Papers - GOTO Tanjuro

山口県育成小輪系ユリ「プチシリーズ」における国内球根養成地および長期氷温貯蔵前の球根の冷蔵処理が切り花形質へ与える影響 Reviewed

福光優子, 尾関仁志, 北村嘉邦, 後藤丹十郎

園芸学研究   23 ( 1 )   271 - 278   2025.1

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Development of an AI-based Image Analysis System to Calculate the Visit Duration of a Green Blow Fly on a Strawberry Flower Reviewed

Hiroki Taniguchi, Yuki Tsukuda, Ko Motoki, Tanjuro Goto, Yuichi Yoshida, Ken‑ichiro Yasuba

The Horticulture Journal   2025

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Japanese Society for Horticultural Science  

DOI： 10.2503/hortj.qh-159

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Effect of Three Days Low-temperature Storage of Tray-grown Strawberry Plants on Emergence and Flowering of Primary Flower Reviewed

Takayoshi Yano, Ryosuke Yamanaka, Minori Endo-Hikawa, Yuki Yoneda, Hisashi Yoshikoshi, Tanjuro Goto, Yuichi Yoshida, Ken-ichiro Yasuba

Horticultural reseach   23 ( 4 )   271 - 278   2024.10

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Effect of seed cold PEG-priming and subsequent long storage on germination, growth and flowering of Eustoma grandiflorum（Raf.）Shinn ʻExe Lavenderʼ.

Thao Thu Phan, Keigo Fukushima, Yoshiyuki Tanaka, Ken-ichiro Yasuba, Yuichi Yoshida, Tanjuro Goto

Sci. Fac. Agr. Okayama Univ.   113   7 - 10   2024.2

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Elucidation of Low-temperature Regulated Flavone Synthesis in <i>Dahlia Variabilis</i> and its Effects on Flower Color Reviewed

Edna K. Muthamia, Koji Naito, Hiromasa Okada, Yukino Karasawa, Tokuyu Kikumura, Takuya Nara, Yasunori Hamauzu, Ko Motoki, Ken-ichiro Yasuba, Yuichi Yoshida, Yoshikuni Kitamura, Tanjuro Goto

The Horticulture Journal   93 ( 4 )   335 - 343   2024

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Japanese Society for Horticultural Science  

DOI： 10.2503/hortj.qh-144

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キュウリ植物体重量の日変動から見た日射および果実の有無による吸水特性 Reviewed

安見明香里, 中川ほのか, 吉田裕一, 後藤丹十郎, 北村嘉邦, 安場健一郎

園芸学研究   22 ( 4 )   259 - 266   2023.12

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Effect of seed cold PEG–priming concentration and period followed by re–drying on germination, growth and flowering of Eustoma grandiflorum （Raf.） Shinn ʻExe Lavenderʼ

Thao Thu, Phan. Fukushima, Keigo, Tanaka, Yoshiyuki, Yasuba, Ken-ichiro, Yoshida, Yuichi, Goto, Tanjuro

Sci. Fac. Agr. Okayama Univ   112 ( 1 )   7 - 12   2023.2

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Comparison of LEDs, Fluorescent Lamps and Incandescent Bulbs for Long-day Treatment of Forcing Strawberries as Affected by Respective Color Temperature.

Yuichi Yoshida, Hanada, Atsushi, Ooguma, Keita, Yoshida, Kenta, Tanjuro Goto, Yoshiyuki Tanaka, Ken-ichiro Yasuba

Sci. Fac. Agr. Okayama Univ.   112 ( 1 )   1 - 6   2023.2

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Low jasmonic acid accumulation causes the defect in the tepal expansion in double-flowered green lily cultivar, ‘Doubleen’ Reviewed

Takuya Fukasawa, Mikiko Kojima, Yumiko Takebayashi, Hitoshi Sakakibara, Ken ichi Matsushima, Ken ichiro Yasuba, Yuichi Yoshida, Tanjuro Goto, Yoshikuni Kitamura

Scientia Horticulturae   308   2023.1

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In this study, the mechanisms underlying green flower phenotype of a lily cultivar, ‘Doubleen’, was investigated focusing on jasmonic acid (JA) accumulation. ‘Doubleen’ is a mutant lily cultivar derived from ‘Yelloween’ and has unexpanded, non-pigmented green tepals but lacks the stamen and carpel. ‘Doubleen’ was treated with methyl jasmonate (MeJA) to investigate the subsequent change in floral organ characteristics. As a result, the tepals of MeJA-treated ‘Doubleen’ expanded and had yellow pigmentation, whereas those of the control did not. To estimate the JA synthesis site in the lily flower, the accumulation profiles of JA and jasmonoyl-L-isoleucine (JA-Ile) were compared between the floral organs of ‘Yelloween’. The JA-Ile content of carpels was the lowest of the three floral organs at all developmental stages. JA-Ile contents in the inner tepals and stamens were not significantly different in all developmental stages. To determine potential role of JA and JA-Ile in tepal expansion and pigmentation in lily flowers, the accumulation of these two compounds was compared between the tepals of ‘Yelloween’ and those of ‘Doubleen’. At all developmental stages, the tepals of ‘Doubleen’ accumulated JA at concentrations lower than those of ‘Yelloween’. Floral organ removal experiments were also conducted using ‘Yelloween’ to evaluate its effect on tepal expansion. Notably, tepal expansion was not affected by pistil removal, but was strongly suppressed by stamen removal. Overall, these results suggest the loss of JA biosynthesis site in the flowers of ‘Doubleen’ leading to the formation of unexpanded green tepals on their flowers.

DOI： 10.1016/j.scienta.2022.111539

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SELECTION OF;NON-FLOWER FADING Dahlia variabilis ‘NESSHO’ PLANTS BASED ON FLAVONE SYNTHASE GENE (DvFNS;EXPRESSION PATTERNS Reviewed

Edna K. Muthamia, Misaki Ando, Ken-ichiro Yasuba, Yuichi Yoshida, Äi0Tanjuro Goto and Yoshikuni Kitamura

The 4th International Conference on Sustainable Agriculture and Environment   2022.11

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BOLTING AND FLOWERING OF Delphinium grandiflorum var. sinensis NOT AFFECTED BY SOWING TIME BUT ROOT ZONE VOLUME. Reviewed

Kawai Mika, Kai Reimi, Kitamura Yoshikuni, Yasuba Ken-ichiro, Yoshida Yuichi, Goto Tanjuro

The 4th International Conference on Sustainable Agriculture and Environment   2022.11

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Morphological and gene expression characterization of maf-1, a floral chili pepper mutant caused by a nonsense mutation in CaLFY Reviewed

Yoshiyuki Tanaka, Mizuki Yokota, Naoto Goto, Tanjuro Goto, Yuichi Yoshida, Ken-ichiro Yasuba, Sho Ohno, Motoaki Doi

Molecular Breeding   42 ( 7 )   2022.7

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s11032-022-01304-w

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Other Link： https://link.springer.com/article/10.1007/s11032-022-01304-w/fulltext.html

Effect of Re-Drying and Storage after 10°C Wet Treatment on Germination and Growth of Five Eustoma grandiflorum (Raf.) Shinn Cultivars

Thao Thu Phan, Keigo Fukushima, Yoshiyuki Tanaka, Ken-ichiro Yasuba, Yuichi Yoshida, Tanjuro Goto

Sci. Fac. Agr. Okayama Univ.   111   1 - 6   2022.3

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Fasciation in Strawberry Floral Organs and Possible Implications for Floral Transition Reviewed

Thi Cam Nguyen, Sunagawa Naomichi, Sesumi Miho, Kitamura Yoshikuni, Tanaka Yoshiyuki, Goto Tanjuro, Yasuba Ken-ichiro, Yoshida Yuichi

The Horticulture Journal   91 ( 1 )   58 - 67   2022

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Japanese Society for Horticultural Science  

<p>Fasciation in strawberry is characterized by an enlarged and flattened receptacle, clustering of flowers, and altered inflorescence architecture. However, the developmental process of fasciated flowers remains obscure. In this study, the fasciation incidence and developmental process in the primary fruit and inflorescence architecture were evaluated and compared for the non-susceptible cultivars, 'Nyoho' and 'Sagahonoka' and one of the most susceptible cultivars, 'Ai-Berry'. The severity and frequency of flower and inflorescence fasciation was clearly greater in the vigorously growing large plants of 'Ai-Berry' compared to small plants and large plants of the other two cultivars. In 'Ai-Berry', the deformation of the large shoot apical meristem (SAM) into an oval shape was the initial symptom observed before and during floral transition. Such oval-shaped SAMs often differentiated two or more leaf primordia almost at the same time, which then developed into divided multiple vegetative SAMs before floral transition and linearly-fasciated SAMs during floral transition, respectively. The development of fasciation symptoms was observed after downregulation of FaTFL1. Although inflorescence or receptacle fasciation could be controlled when early and rapid floral induction was achieved by intermittent low-temperature treatment, severe fasciation was observed in late-flowered plants which were either not responsive or not subjected to this treatment. These results indicate that fasciation of floral organs may be triggered and develop during floral transition and that temperature fluctuations around boundary values between floral inhibition to induction may cause a half-finished or slowly processed floral transition and finally result in severe fasciation in vigorously growing 'Ai-Berry' plants.</p>

DOI： 10.2503/hortj.UTD-315

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Combination Treatment of Silver Thio-Sulfate Complex with 6-Benzyladenine Improves the Cut Flower Quality after Cold Dry Storage in Dutch Iris ‘Blue Magic’ Reviewed

Noriko Toyohara, Yoshikuni Kitamura, Tanjuro Goto

Horticultural Research (Japan)   21 ( 2 )   219 - 227   2022

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DOI： 10.2503/hrj.21.219

J-GLOBAL

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Capsaicinoid biosynthesis in the pericarp of chili pepper fruits is associated with a placental septum-like transcriptome profile and tissue structure Reviewed

Yoshiyuki Tanaka, Mayuko Watachi, Wakana Nemoto, Tanjuro Goto, Yuichi Yoshida, Ken-Ichiro Yasuba, Sho Ohno, Motoaki Doi

PLANT CELL REPORTS   40 ( 10 )   1859 - 1874   2021.7

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Key message CAP biosynthesis in the pericarp of chili pepper fruits occurs with an ambiguous boundary in the placental septum and pericarp. Capsaicinoid (CAP) is a pungent ingredient of chili pepper fruits. Generally, CAP biosynthesis is limited to the placental septum of fruits, but it has been reported that its biosynthesis occurs even in the pericarp of some extremely pungent varieties, resulting in a substantial increase in total content. To examine the mechanism of CAP biosynthesis in the pericarp, comparative transcriptome analysis of a variety that produces CAP in the pericarp (MY) and a variety that does not (HB) was carried out. RNA-seq revealed that 2264 genes were differentially expressed in the MY pericarp compared with the HB pericarp. PCA analysis and GO enrichment analysis indicated that the MY pericarp has a gene expression profile more like placental septum than the HB pericarp. The gene expression of CAP biosynthesis-related genes in the MY pericarp changed coordinately with the placental septum during fruit development. In most Capsicum accessions including HB, the distribution of slender epidermal cells producing CAP was limited to the placental septum, and the morphological boundary between the placental septum and pericarp was clear. In some extremely pungent varieties such as MY, slender epidermal cells ranged from the placental septum to the pericarp region, and the pericarp was morphologically similar to the placental septum, such as the absence of large sub-epidermal cells and abundant spaces in the parenchymal tissue. Our data suggest that CAP biosynthesis in the pericarp occurred with an ambiguous boundary in the placental septum and pericarp. These findings contribute to further enhancement of CAP production in chili pepper fruits.

DOI： 10.1007/s00299-021-02750-0

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Characterization and bulk segregant analysis of a novel seedless mutant tn-1 of chili pepper (Capsicum annuum) Reviewed

Yoshiyuki Tanaka, Ami Mitani, Nodoka Shimizu, Tanjuro Goto, Yuichi Yoshida, Ken-ichiro Yasuba

Scientia Horticulturae   276   109729 - 109729   2021.1

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

Seedlessness is a desirable trait to improve eases of processing and fresh consumption of sweet pepper (Capsicum annuum L.). Genetic resources for seedless pepper breeding are limited, compared with other Solanaceae crops. A new seedless mutant named tn-1, was identified by screening an ethylmethane sulfonate mutagenized population derived from ornamental chili pepper. Wild-type fruit contained about 40 seed; tn-1 contained no, or a few seed. Ninety-nine individuals in the F-2 population derived from a cross between tn-1 and other cultivars were classified into the groups: Normal with more than 3 seed in each fruit, and Seedless with less than 3 seed in each fruit. The Seedless group had smaller fruit compared with the Normal group. The average values of fruit weight, length, and width of Normal group were 2.94 g, 3.64 cm and 1.40 cm, respectively. On the other hand, mean values for the Seedless group were 0.64 g, 2.11 cm, and 0.90 cm, respectively. Genetic analysis indicated that seedlessness was determined by a single recessive gene. Bulk segregant analyses combined with genotyping-by-sequencing were conducted to identify the genomic region responsible for seedlessness in tn-1. It appears the gene responsible for seedlessness may be located near the end of chromosome 12. The tn-1 mutant will be a useful breeding material to develop seedless sweet pepper.

DOI： 10.1016/j.scienta.2020.109729

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Effects of Flowering Stage at Harvest, Storage Method, and Application of Gibberellin and Benzyladenine on Flower Opening and Tepal Senescence of Dutch Iris ‘Blue Magic’ Cut Flower Reviewed

Noriko Toyohara, Akane Higashi, Tanjuro Goto

Horticultural Research (Japan)   19 ( 1 )   75 - 82   2020.3

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DOI： 10.2503/hrj.19.75

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Effect of Defoliation on Blossom-end Rot Incidence and Calcium Transport into Fruit of Tomato Cultivars under Moderate Water Stress. Reviewed

Indeche, Annah・Yuichi, Yoshida・Tanjuro, Goto・Kenichiro, Yasuba・Yoshiyuki, Tanaka

The Horticulture Journal   89 ( 1 )   22 - 29   2020.3

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPAN SOC HORTICULTURAL SCI  

The translocation of calcium (Ca) within the tomato plant and the causes of Ca deficiency, a factor associated with blossom-end rot (BER) in fruit, are still a matter of conjecture. The objective of this study was to determine the effect of defoliation on BER incidence and Ca transport into different size tomato fruit cultivars. Four experiments were conducted. The start and end dates for each experiment were; 14 March-2 May, 22 July-23 August, 30 August-7 October 2017, and 20 May-25 June 2018, for experiments 1, 2, 3, and 4, respectively. Five tomato cultivars including one large ('Momotaro fight (MF)', >= 200 g), three medium ('Lui60 (L60)', 'Flo cook (TC)', and 'Cindy sweet (CS)', 30-80 g), and one small ((Pepe (PP)', <= 20 g) fruit cultivars, respectively, were grown under moderate water stress controlled by a combination of root zone restriction and solar mediated fertigation. Leaf area of plants was reduced by 20-30% by removing alternate leaflets on all leaves. Defoliation significantly reduced BER in all experiments. In experiment 4, no BER was observed in defoliated plants of L60 and PP, and in MF and TC, BER incidence decreased to a quarter of the control. Defoliation increased the fruit growth rate (FGR) in experiment 1, in which the temperature was the lowest, by a ratio of 1.42 and by 1.39 in experiment 4, in which the radiation was strongest and day length longest. Defoliation increased the rate of daily Ca transport into fruit (CTR) in MF, L60, TC, CS, and PP by average ratios of 1.64, 1.55, 1.35, 1.30, and 1.13, respectively. The increase in CTR in defoliated plants was highest in experiment 4 with a ratio of 1.68 followed by 1.37, 1.33, and 1.28 in experiments 1, 3, and 2, respectively. Defoliation increased both FGR and CTR and there were significant linear relationships between them. However, the degree of increase was larger in CTR than that in FGR, especially in the BER-sensitive large fruit cultivar MF, and defoliation increased the total Ca concentration in fruit accordingly. We conclude that under moderate water stress by root zone restriction and certain other BER inductive conditions, defoliation could be a promising approach to reduce BER incidence by improving Ca nutrition in susceptible large fruit cultivars.

DOI： 10.2503/hortj.UTD-079

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Defoliating to 12-15 leaves increases calcium concentration and decreases blossom-end rot incidence in fruit of tomato plant grown under moderate water stress.

Annah Khatenje Indeche, Yuichi Yoshida, Daisuke Miyaji, Tanjuro Goto, Ken-ichiro Yasuba, Yoshiyuki Tanaka

Sci. Fac. Agr. Okayama Univ.   109   21 - 27   2020.3

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Effects of Harvest Shoot Stage on Partitioning of Photosynthates Originating from Bent Shoots in the Modified Arching Technique of Cut Rose Production. The Horticulture Journal Reviewed

Chisato Isobe, Shinji Kajihara, Yoshiyuki Tanaka, Ken-ichiro Yasuba, Yuichi Yoshida, Katsuhiko Inamoto, Gen Ishioka, Motoaki Doi, Tanjuro Goto

The Horticulture Journal   89 ( 3 )   278 - 283   2020

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Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Japanese Society for Horticultural Science  

By using a stable isotope method, partitioning of photosynthates was examined in a modified arching (MA) technique that achieved a high cut flower productivity to clarify how photosynthates produced by bent shoots are distributed within a plant at different developmental stages of harvest shoots. The translocation ratios from bent shoots at four days after harvest, eight days after harvest, for 10 cm-shoots, flower budding, and blooming were 44.0, 40.2, 51.0, 38.3, and 23.4%, respectively, and plants at the blooming stage had lower translocation ratios compared to those at the other developmental stages. The distribution of photosynthates produced by the bent shoot parts varied with the plant stage of the harvest shoots. The partitioning ratios of roots and crowns at four days, eight days, for 10 cm-shoots, flower budding, and blooming were 63.9, 53.5, 17.5, 26.6, and 81.0%, respectively. From these results, it was revealed that in the period from blooming to the next sprouting, roots and crowns were strong sinks. The partitioning ratios of mother stems were 36.2, 46.4, 7.2, 15.0, and 8.2%, respectively. We estimate that the mother stems are a strong sink right after harvest and absorb the photosynthates for the new sprouting. At the 10 cm-shoot and flower budding stages, photosynthates were partitioned to harvest shoots at 75.2% and 58.4%, respectively, indicating that they were distributed preferentially to vigorously growing harvest shoots. A total of 11.4% of the photosynthates were partitioned to harvest shoots at the blooming stage, suggesting that the photosynthates from the bent shoots were not involved directly in flower blooming. This study will contribute to improving the MA technique and cut rose production.

DOI： 10.2503/hortj.utd-116

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Positional differences of intronic transposons in pAMT affect the pungency level in chili pepper through altered splicing efficiency Reviewed

Tanaka, Yoshiyuki, Asano, Takaya, Kanemitsu, Yorika, Goto, Tanjuro, Yoshida, Yuichi, Yasuba, Kenichiro, Misawa, Yuki, Nakatani, Sachie, Kobata, Kenji

Plant Journal   100 ( 4 )   693 - 705   2020

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY  

Capsaicinoids are unique compounds that give chili pepper fruits their pungent taste. Capsaicinoid levels vary widely among pungent cultivars, which range from low pungency to extremely pungent. However, the molecular mechanisms underlying this quantitative variation have not been elucidated. Our previous study identified various loss-of-function alleles of the pAMT gene which led to low pungency. The mutations in these alleles are commonly defined by Tcc transposon insertion and its footprint. In this study, we identified two leaky pamt alleles (pamt(L1) and pamt(L2)) with different levels of putative aminotransferase (pAMT) activity. Notably, both alleles had a Tcc transposon insertion in intron 3, but the locations of the insertions within the intron were different. Genetic analysis revealed that pamt(L1), pamt(L2) and a loss-of-function pamt allele reduced capsaicinoid levels to about 50%, 10% and less than 1%, respectively. pamt(L1) and pamt(L2) encoded functional pAMT proteins, but they exhibited lower transcript levels than the functional type. RNA sequencing analysis showed that intronic transposons disrupted splicing in intron 3, which resulted in simultaneous expression of functional pAMT mRNA and non-functional splice variants containing partial sequences of Tcc. The non-functional splice variants were more dominant in pamt(L2) than in pamt(L1). This suggested that the difference in position of the intronic transposons could alter splicing efficiency, leading to different pAMT activities and reducing capsaicinoid content to different levels. Our results provide a striking example of allelic variations caused by intronic transposons; these variations contribute to quantitative differences in secondary metabolite contents.

DOI： 10.1111/tpj.14462

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Intermittent Low Temperature Storage Duration and Cycle on the Growth and Flowering of Eustoma (Eustoma grandiflorum L.) Seedlings Raised in the Summer The Horticulture Journal Reviewed

Thao Thu Phan, Satoshi Sasaki, Keigo Fukushima, Yoshiyuki Tanaka, Ken-ichiro Yasuba, Yuichi Yoshida, Tanjuro Goto

The Horticulture Journal   89 ( 3 )   292 - 299   2020

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Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPAN SOC HORTICULTURAL SCI  

In the present study, we evaluated the effects of intermittent low temperature storage (ILTS) following cold imbibition of Eustoma seeds as a low-cost method. The objective of this study was to investigate the effects of the total number of cold storage days and the lengths of ILTS cycles for seedlings on the subsequent growth and flowering of three cultivars with different susceptibilities to rosetting: 'Nancy', 'Exe Lavender', and 'Bolero White'. Before sowing, the seeds were imbibed with water at 10 degrees C under a dark condition for 35 days. A cycle of 6D/6D (6 days in a refrigerator kept at 10 degrees C in the dark/6 days in a greenhouse kept at a high ambient temperature) was repeated 0, 1, 2, 3, 4, and 5 times to attain 0, 6, 12, 18, 24, and 30 days of cold storage (DCS), respectively. Using a cycle of 6D/6D at least one time (6 DCS) increased the bolting and flowering percentages and accelerated the bolting date by 6-10 days and the flowering date by 4-9 days in 'Nancy', a high-rosetting cultivar. The percentage of harvesting was above 80% only in seedlings subjected to 24 and 30 DCS in ILTS. In addition, under equal 30 DCS of ILTS, cycles of 3D/3D x 10 times, 6D/6D x 5 times, and 15D/15D x 2 times were investigated by exposing the seedlings to a high ambient temperature for 3, 6, and 15 days and then transferring them to a refrigerator (10 degrees C) for 3, 6, and 15 days, respectively. ILTS cycles of 3D/3D and 6D/6D resulted in earlier bolting and flowering dates than cycles of 15D/15D. The cycle of 15D/15D resulted in a lower percentage of marketable harvesting and an increased number of nodes to the first flower. These results suggest that applying ILTS with a cycle of 6D/6D at least four times can be an efficient method to promote the bolting and flowering of Eustoma without applying air conditioning to the entire greenhouse.

DOI： 10.2503/hortj.UTD-145

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Effects of Length of Light Period and Photosynthetic Photon Flux Density in Growth Chamber on Germination and Growth of &lt;i&gt;Eustoma grandiflorum&lt;/i&gt; after Low-temperature Wet Treatment of Seeds Reviewed

Keigo Fukushima, Shinji Kajihara, Satoshi Ishikura, Mina Tokiyasu, Naoko Fukuta, Tanjuro Goto

Horticultural Research (Japan)   18 ( 4 )   373 - 379   2019.9

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DOI： 10.2503/hrj.18.373

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ベゴニア‘ネティア’の生育，開花および草姿に対する間欠冷蔵処理と短日処理効果の比較． Reviewed

中島 拓, 後藤丹十郎

植物環境工学   31   210 - 215   2019

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Development of Program Library Using an Open-source Hardware for Implementation of Low-cost Greenhouse Environmental Control System Reviewed

Ken-ichiro YASUBA, Hidehito KUROSAKI, Takehiko HOSHI, Takashi OKAYASU, Yoshiyuki TANAKA, Tanjuro GOTO, Yuichi YOSHIDA

Environmental Control in Biology   56 ( 3 )   107 - 112   2018.7

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A program library for use on open-source hardware was developed in order to construct a low-cost environmental control system for greenhouses. The library facilitated the development of environmental sensing and control devices that conform to the protocols of the Ubiquitous Environment Control System (UECS). The open-source hardware used was the &quot;Arduino Ethernet&quot; and the &quot;Arduino Mega 2560 with Ethernet Shield&quot; microcontroller boards. UECS is a system for controlling greenhouse environments that communicates information via a local area network, and devices utilizing the library that we developed can perform the UECS defined communication tasks automatically. With the help of this library, device developers no longer need to program the communications aspects of the device and can concentrate on programming setting and control logic of the device. The library occupies about 29 kilobytes of the read only memory area of the target board. The library and associated open-source microcontroller boards are powerful tools for developing low-cost environmental control systems.

DOI： 10.2525/ecb.56.107

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吸水種子湿潤低温処理後のトルコギキョウの発芽と生育に及ぼすグロースチャンバーにおける育苗温度の影響 Reviewed

福島啓吾, 梶原真二, 石倉 聡, 福田直子, 後藤丹十郎

17   395 - 403   2018

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開花期の年次安定性と斉一性に優れる8月咲きの小ギク'春日の紅'の育成． Reviewed

仲 照史, 廣岡健司, 辻本直樹, 角川由加, 虎太有里, 後藤丹十郎

園芸学研究   17   105 - 114   2018

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Effect of Re-drying Seeds after Wet Treatment at 10℃ on the Germination and Growth of Eustoma grandiflorum (Raf.) Shinn. Reviewed

Fukushima, K, S. Kajihara, S. Ishikura, N. Kastutani, T. Goto Tanjuro

The Horticuluture Journal.   87 ( 3 )   413 - 420   2018

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This study was initiated to investigate the effects of wet treatment at 10 degrees C (WT10 degrees C) and subsequent re-drying treatment (RDT) on the germination and growth of Eustoma grandiflorum seeds. Both treatments, WT10 degrees C and RDT, were applied at 10 degrees C under dark conditions. In all the experiments, 'King of Snow', which is one of the major Eustoma cultivars in Japan, was used. When the total number of days exposed to WT10 degrees C and RDT was set to 35 days, the prevention of rosettes and the promotion of growth were dependent on the number of days of WT10 degrees C, and these effects were maintained after RDT. When RDT was applied to the seeds after WT10 degrees C for 35 days, the growth promotion due to WT10 degrees C was maintained regardless of the length of re-drying time from 7 to 28 days; however, the germination rate decreased with RDT. On the other hand, applying RDT after WT10 degrees C for 14 days had no effect on the germination rate; however, the growth promotion was insufficient compared with WT10 degrees C for 28 days. This problem was solved by carrying out a further 14 days of WT10 degrees C after RDT. When the seeds were exposed to WT10 degrees C for 14 days, then re-dried for 7 days, and exposed to WT10 degrees C for a further 14 days, the same growth promotion was achieved as for seeds exposed to WT10 degrees C for 28 days continuously. The above results suggest that the promotion of growth depends on the total number of days of WT10 degrees C regardless of whether these days are continuous or not. Moreover, the growth promotion was maintained after RDT. The results also suggest the possibility that when both the processes of WT10 degrees C and the RDT are carried out by seed companies, growers who have no cooling equipment can produce cut flowers using seedlings grown in the high-temperature season.

DOI： 10.2503/hortj.OKD-149

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プライミング種子への吸水種子湿潤低温処理がトルコギキョウ'レイナホワイト'の生育および切り花形質に及ぼす影響． Reviewed

福島啓吾, 梶原真二, 石倉 聡, 後藤丹十郎

園芸学研究   17   79 - 85   2018

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間欠冷蔵処理がエラチオール・ベゴニア‘ネティア’の開花および生育に及ぼす影響 Reviewed

中島 拓, 後藤丹十郎

園芸学研究   17   73 - 78   2018

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Identification of a Novel Mutant pAMT Allele Responsible for Low-pungency and Capsinoid Production in Chili Pepper Accession 'No.4034' (Capsicum chinense). Reviewed

Yoshiyuki Tanaka, Shiho Fukuta, Sota Koeda, Tanjuro Goto, Yuichi Yoshida, Ken-ichiro Yasuba

The Horticulture Journal   68 ( 2 )   222 - 228   2018

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Capsinoids are low-pungent capsaicinoid analogues in chili pepper fruits. They exhibit various bioactivities in humans similar to capsaicinoids, but do not produce a nasty burning sensation, encouraging their application in foods and supplements. Previous reports demonstrated that loss-of-function of putative aminotransferase (pAMT) leads to low-pungency and capsinoid accumulation. Therefore, the pamt allele is a useful gene in chili pepper breeding programs to enhance health-promoting properties. Eight loss-of-function alleles have been identified in the Capsicum genus, but the variation in paint alleles remains to be fully elucidated. In this study, we identified one novel loss-of-function allele from the analysis of low-pungent chili pepper 'No. 4034' (C. chinense). 'No. 4034' contained mainly capsinoid with an undetectable level of capsaicinoid. A genetic complementation test was conducted by crossing 'No. 4034' with other accessions. The results indicated that 'No. 4034' possessed a loss-of-function pamt allele. Sequence analysis showed that the novel mutant allele contained a 7-bp insertion (TCGGTAC) in the 16th axon region, which we designated as pamt(9). The insertion caused a frameshift mutation and resulted in a truncated protein. Gene expression analysis showed that the expression level of pAMT specifically decreased among biosynthetic genes tested here in 'No. 4034', compared with that of pungent accession. pamt(9) will be useful for low-pungency and capsinoid breeding, and will provide additional information for variations in pAMT mutants.

DOI： 10.2503/hortj.OKD-115

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Difference in capsaicinoid biosynthesis gene expression in the pericarp reveals elevation of capsaicinoid contents in chili peppers (Capsicum chinense) Reviewed

Yoshiyuki Tanaka, Fumihiro Nakashima, Erasmus Kirii, Tanjuro Goto, Yuichi Yoshida, Ken-ichiro Yasuba

PLANT CELL REPORTS   36 ( 2 )   267 - 279   2017.2

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This research reveals that the up-regulated expression of multiple capsaicinoid biosynthetic genes in pericarp tissue leads to the elevation of total capsaicinoid content in chili pepper fruit.
Capsaicinoids are health-functional compounds that are produced uniquely in chili pepper fruits. A high capsaicinoid level is one of the major parameters determining the commercial quality and health-promoting properties of chili peppers. To investigate the mechanisms responsible for its high contents, we compared an extremely pungent cultivar 'Trinidad Moruga Scorpion Yellow' (MY) with other cultivars of different pungency levels (Fushimi-amanaga, Takanotsume, Red Habanero). Capsaicinoid concentrations were markedly higher in MY fruit (23.9 mg/g DW) than in other pungent cultivars including 'Red Habanero' (HB) fruit (14.3 mg/g DW). Comparative analysis of MY and HB reveals that both cultivars accumulated similar capsaicinoid concentrations in the placental septum, with that in the HB pericarp (1.8 mg/g DW) being markedly lower than that in the placental septum (69.1 mg/g DW). The capsaicinoid concentration in HB fruit is dependent on the placental septum, as reported in other accessions. Therefore, even though placental septum tissue contains high capsaicinoid concentrations, those in the pericarp and seeds attenuated its total content. In contrast, the MY pericarp exhibited a markedly higher concentration (23.2 mg/g DW). A qRT-PCR analysis revealed that multiple capsaicinoid biosynthetic pathway genes (Pun1, pAMT, KAS, and BCAT) were strongly up-regulated in placental septum of pungent cultivars. The genes were expressed exclusively in the MY pericarp, but were barely detected in the pericarps of other pungent cultivars. Collectively, the present study indicates that the up-regulated expression of these genes not only in placental septum but also in pericarp plays an important role in driving capsaicinoid accumulation in the whole fruit.

DOI： 10.1007/s00299-016-2078-8

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Non-pungency in a Japanese Chili Pepper Landrace (Capsicum annuum) is Caused by a Novel Loss-of-function Pun1 Allele Reviewed

Erasmus Kirii, Tanjuro Goto, Yuichi Yoshida, Ken-ichiro Yasuba, Yoshiyuki Tanaka

HORTICULTURE JOURNAL   86 ( 1 )   61 - 69   2017.1

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Pungency in peppers is due to the presence of the alkaloid capsaicin and its analogues, collectively known as capsaicinoids. These compounds are only produced in the Capsicum genus and function as deterrents to mammals from consuming the pepper fruits. Pungency in pepper is qualitatively controlled by the Pun1 locus, which encodes a putative acyltransferase enzyme. Mutations in the Pun1 gene result in a loss of pungency, and several Pun1 loss-of-function alleles have been identified in sweet peppers to date (pun1(1-3)). However, variations in pun1 alleles have not been completely elucidated. In the present study, we report a new type of loss-of-function pun1 allele, named pun1(4), in a Japanese sweet pepper cultivar, 'Nara Murasaki' (C. annuum). Sequence analysis at the Pun1 locus revealed that this type of Pun1 allele is caused by a single adenine nucleotide insertion in the second exon region. This insertion is unique to 'Nara Murasaki' and is not present in wild-type Pun1. This insertion causes a frameshift mutation and a change in the amino acid sequence, resulting in a truncated protein. The results of gene expression analysis indicated that the expression of Pun2 in 'Nara Murasaki' was hardly detectable, while the transcripts of this gene were strongly expressed in a pungent cultivar. In a co-segregation test, the pun1(4) genotype perfectly co-segregated with non-pungency in 103 F-2 population plants of a cross between 'Nara Murasaki' and a pungent cultivar. 'Nara Murasaki' and a DNA marker to distinguish the pun1(4) allele will be informative for understanding the domestication process of sweet peppers.

DOI： 10.2503/hortj.MI-148

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Software to Calculate Greenhouse Interstice Ventilation Frequency Based on Nocturnal Time Course of CO&lt;sub&gt;2&lt;/sub&gt; Reviewed

Ken-ichiro Yasuba, Takuya Fujio, Katsuyoshi Watanabe, Chisyu Tane, Tatsuya Yamada, Yuki Uchimura, Yuichi Yoshida, Tanjyuro Goto, Yoshiyuki Tanaka

Agricultural Information Research   26 ( 4 )   155 - 163   2017

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DOI： 10.3173/air.26.155

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Effects of Planting System on Flowering Period Uniformity of Small-flowered Spray-type Chrysanthemum Reviewed

Terufumi Naka, Shigeichi Maeda, Tanjuro Goto

Horticultural Research (Japan)   16 ( 1 )   41 - 50   2017

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DOI： 10.2503/hrj.16.41

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トルコギキョウの生育および切り花形質に及ぼす吸水種子湿潤低温処理方法の影響 Reviewed

福島啓吾, 梶原真二, 石倉 聡, 勝谷範敏, 後藤丹十郎

園芸学研究   17   177 - 184   2017

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Effect of Temperature at the Seedling Stage after Low-Temperature Treatment of Imbibed Seeds on the Growth and Characteristics of Eustoma grandiflorum Reviewed

Fukushima Keigo, Kajihara Shinji, Ishikura Satoshi, Katsutani Noritoshi, Imamura Hitoshi, Goto Tanjuro

Horticultural Research (Japan)   15 ( 4 )   377 - 382   2016

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<p>This study was carried out in order to improve the cut flower production of Eustoma grandiflorum for shipment in late autumn and early spring. In this study, the effect of low-temperature treatment of imbibed seeds for cultivars with different rosette characteristics was investigated. Moreover, the effect of the day and night temperatures after the low-temperature treatment of the imbibed seeds on the growth of flowers was investigated. The experiments were conducted using two cultivars with different rosette characteristics. The bolting rate, flower budding rate, and flowering rate were increased by low-temperature treatment of the imbibed seeds regardless of the rosette characteristics. After low-temperature treatment of the imbibed seeds, seedlings of the two cultivars were raised at different night temperatures (22, 25, 28, and 31°C). With night temperatures of 28 and 31°C, the bolting and flowering rates decreased, regardless of the rosette characteristics, whereas at 22 and 25°C, the bolting rate, flower budding rate, and flowering rate were higher. For night temperatures in the range 22～31°C, the growth and length of the cut were better at lower rather than higher temperatures. Growth at different day temperatures (30 and 40°C) after the low-temperature treatment had no affect on the bolting, flower budding, or flowering rates. However, growth was more favorably promoted with a day temperature of 30°C compared with 40°C.</p>

DOI： 10.2503/hrj.15.377

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低コスト環境制御システム構築のためのプログラムライブラリの開発 Reviewed

安場健一郎, 多根知周, 田中義行, 後藤丹十郎, 吉田裕一, 黒崎秀仁, 岡安崇史, 星 岳彦

農業情報研究   25 ( 1 )   12 - 18   2016

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Effects of Interrupted Lighting on the Spray Formation of Summer-to-autumn- flowering Small-flowered Spray-type Chrysanthemum Cultivars 'Haruka' and 'Subaru' Reviewed

Yoshio Mori, Katsuhiko Sumitomo, Tamotsu Hisamatsu, Tanjuro Goto

HORTICULTURE JOURNAL   85 ( 3 )   264 - 271   2016

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Summer-to-autumn-flowering small-flowered spray-type (SAFS) chrysanthemums (Chrysanthemum morifolium Ramat.) are commercially important in Japan, and there is an occasional increased demand for these flowers. However, under current cultivation methods, the quality of spray formations is compromised in order to maintain a sufficient production rate at times of peak demand. This study investigated the effect of interrupted lighting (IL), the intercalation of a period of long days (by night interruption) into the natural day length (NDL) period of growing, in order to regulate spray formations in SAFS chrysanthemum cultivars 'Haruka' and 'Subaru', in which lighting can markedly delay flowering. The effects of the NDL period before IL and those of the IL period were investigated. First, we investigated the effect of 2-12 days of NDL followed by 12 days of IL. Plants subjected to 2-6 days of NDL had longer flower clusters and a greater number of flower buds on the upper lateral flower stems and developed a broom-like spray. Next, we investigated the effect of 420 days of IL after 4 days of NDL. Plants subjected to 8-20 days of IL had longer flower clusters, more flower buds on the upper lateral flower stems, and broom-like sprays. These changes were more pronounced when the IL periods were prolonged. Our results showed that spray formation in SAFS chrysanthemum cultivars 'Haruka' and 'Subaru' can be regulated by controlling the timing and period of IL.

DOI： 10.2503/hortj.MI-072

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中玉トマト'シンディスィート'の尻腐れ果発生および果実中の水溶性Ca濃度の季節変化と果実肥大速度の関係.園芸学研究. Reviewed

大山光男, 吉田裕一, Tran Duy Vinh, 田中義行, 安場健一郎, 後藤丹十郎

園芸学研究   15 ( 2 )   189 - 196   2016

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Importance of Line Selection to Improve Uniformity of Flowering Period of Small-Flowered Spray-Type Chrysanthemum Flowering in Summer-to-autumn Reviewed

Naka Terufumi, Sumikawa Yuka, Maeda Shigeichi, Goto Tanjuro

Horticultural Research (Japan)   15 ( 1 )   39 - 46   2016

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In order to improve the uniformity in the flowering period of summer-to-autumn flowering-type chrysanthemums, the influence of a previous history of cuttings on flowering was investigated in Exp. 1 using two cultivars, 'Minoru' and 'Okinamaru'. The flowering period was markedly influenced by individual mother stocks and the node number where the cuttings were taken from. In Exp. 2, paying attention to the difference between mother stocks, the possibility of line selection was examined to improve the uniformity of flowering. In the first year, using three cultivars, 'Okinamaru', 'Hiroshimabeni', and 'Kosuzu', 1-5 lines of each cultivar were chosen as earlier or later flowering lines. In the next year, these selected lines were cultivated under the condition of rain-protected culture. In comparison with the control, the flowering periods became shorter and the coefficient of variance in the flowering became smaller. The earlier or later flowering characters of these selected lines were replicated in the examination under the condition of an open field in another year. In the supplementary test without training, the flowering period of these selected lines became shorter and the ratio of cut flowers which bloomed for the peak seven days increased.

DOI： 10.2503/hrj.15.39

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ミツバチの代替･補完ポリネーターとしてのヒロズキンバエの利用 Reviewed

花田惇史, 吉田裕一, 佐藤卓也, 後藤丹十郎, 安場健一郎, 田中義行

園芸学研究   15 ( 2 )   161 - 169   2016

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Development of a Program Library to Construct a Low-Cost Environmental Control System

Yasuba Ken-ichiro, Tane Chisyu, Tanaka Yoshiyuki, Goto Tanjuro, Yoshida Yuichi, Kurosaki Hidehito, Okayasu Takashi, Hoshi Takehiko

Agricultural Information Research   25 ( 1 )   12 - 18   2016

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A Java class library was developed to construct a Ubiquitous Environment Control System (UECS), and the developed system was used to control the environment in a greenhouse using information communication. The library was able to implement the UECS communication protocol, so a developer could write a program without referring to the complicated communication protocol. Specifically, we created a program for operating a ventilation fan using data on air temperature that was received automatically via a local area network. In this case, only 45 lines of programming were needed, just 3.6% of the the number that would be needed to create an equivalent program without the library. Java programs can run on a variety of platforms, so the scope of the library's application is wide. In addition, both the development of UECS devices and construction of UECS systems will be facilitated through the use of this library.

DOI： 10.3173/air.25.12

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Multiple loss-of-function putative aminotransferase alleles contribute to low pungency and capsinoid biosynthesis in Capsicum chinense Reviewed

Yoshiyuki Tanaka, Tomomi Sonoyama, Yuji Muraga, Sota Koeda, Tanjuro Goto, Yuichi Yoshida, Kenichiro Yasuba

MOLECULAR BREEDING   35 ( 6 )   142   2015.6

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Capsicum chinense is a domesticated hot pepper species in the Capsicum genus that originated in the Amazon and is consumed in USA, the Caribbean and South America. Although a characteristic of this species is high pungency, some non-pungent or low-pungent strains, called "Aji Dulce'' (sweet pepper in Spanish), exist in the Caribbean region. In the present study, low-pungent C. chinense accessions were analyzed in order to elucidate the genetic mechanisms responsible for low pungency. All low-pungent C. chinense accessions in this study carried non-functional alleles of putative aminotransferase (pAMT), which catalyzes the formation of vanillylamine from vanillin in the capsaicinoid biosynthetic pathway. These low-pungent accessions produced capsinoids, low-pungent capsaicinoid analogs. The pamt mutation in each strain was characterized using allele-specific markers, and one novel pamt allele (pamt(7)) was identified. The pamt(7) had a new hAT family transposon insertion in the second exon region, which caused the loss of pAMT expression. pamt(7) is apparently an ancestral allele for pamt(6) because the 7-bp insertion in pamt(6) can be regarded as a footprint of the transposon. A phylogenetic analysis of pamt alleles was performed to examine their relationships. Combined with previously reported pamt alleles, the Tcc family transposon insertion and its excision were involved in the generation of various pamt alleles in C. chinense. A phylogenetic analysis of pamt alleles showed that at least five occurred within C. chinense after speciation of the Capsicum genus. In conclusion, the results of the present study identified pamt as the main and most frequent gene controlling low pungency in C. chinense. Allelic variations in loss-of function pamt and their wide distribution demonstrated the potential of C. chinense bioresources for genetic improvements to pungency and metabolic profiles in hot pepper breeding programs.

DOI： 10.1007/s11032-015-0339-9

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Effects of Air Temperature at Different Developmental Stages of Shoots on Occurrence of Abnormal Inflorescence in Gypsophila paniculata ‘Altair’ Reviewed

山口訓史, 後藤丹十郎, 大谷翔子, 安場健一郎, 田中義行, 吉田裕一

園芸学研究   14 ( 3 )   261 - 266   2015

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Incidence of Blossom-end Rot in Relation to the Water-soluble Calcium Concentration in Tomato Fruits as Affected by Calcium Nutrition and Cropping Season Reviewed

Yuichi Yoshida, Nobuyuki Irie, Tran Duy Vinh, Mitsuo Ooyama, Yoshiyuki Tanaka, Ken-ichiro Yasuba, Tanjuro Goto

JOURNAL OF THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE   83 ( 4 )   282 - 289   2014.10

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To understand the factors affecting the incidence of blossom-end rot (BER), the effect of the Ca/K ratio (4/12-12/4, in me.L-1) in nutrient solutions and Ca concentration in fractions in the distal part of young tomato fruits immediately before BER symptoms appear were investigated for three seasons. The rate of BER incidence increased with a decrease in the Ca/K ratio in the supplied solutions in the summer and spring, but little difference was observed in the winter. Ca concentration was highest in winter and lowest in summer, and the concentration in fractions decreased with a decrease in the Ca/K ratio of the solutions. When the results of all three experiments were pooled, among the fractions, water-soluble Ca concentration was found to have the highest significance in the relationship to BER incidence. The risk of BER incidence in rapidly growing tomato increased to a critical level when water-soluble Ca in the distal part of the fresh fruit decreased to less than 0.20 mu mol.g(-1) FW. Multiple-regression analysis revealed that the concentration of water-soluble Ca, which is predominantly recovering apoplastic or cytoplasmic Ca2+, and total Ca, which has been translocated during fruit development, are significantly affected by solar radiation and Ca concentration in the supplied solution rather than air temperature.

DOI： 10.2503/jjshs1.CH-107

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暗期中断による7～9月の高需要期連続出荷に適する小ギク品種の選定 Reviewed

森 義雄, 中島 拓, 藤本拓郎, 常見高士, 住友克彦, 久松 完, 後藤丹十郎

園芸学研究   13   349 - 356   2014

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Agricultural Use of Sludge Dredged from Deposits in Lakes and Reservoirs Reviewed

82 ( 7 )   536 - 538   2014

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小ギク切り花の開花程度選別を機械化するための計測手法 Reviewed

仲 照史, 濱田敏弘, 松本由利子, 福本靖彦, 印田清秀, 後藤丹十郎

植物環境工学   26   145 - 153   2014

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Effect of Minimum Air Temperature on Occurrence of Abnormal Inflorescence and Cut Flower Quality in Gypsophila paniculata ‘Altair’ Reviewed

Norihito Yamaguchi, Tanjuro Goto, Kayoko Kobiki, Shoko Otani, Yoshiyuki Tanaka, Yuichi Yoshida

Hort. Res. (Japan)   13 ( 2 )   161 - 167   2014

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養液栽培イチゴの生育・収量と果実発育に及ぼすカリウム栄養の影響

吉田 裕一, 大森 敏正, 後藤丹十郎, 田中 義行, 村上 賢治

岡山大学農学部学術報告   103   11 - 19   2014

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Effect of Pulsed Lighting from Yellow Fluorescent Light Emitting Diodes on the Budding, Flowering, and Flower Characteristics of Small-flowered Spray-type Chrysanthemums Reviewed

Ishikura Satoshi, Goto Tanjuro, Kajihara Shinji, Higashiura Masaru

Hort. Res. (Japan)   12 ( 4 )   419 - 426   2013

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We describe the use of pulsed lighting from yellow fluorescent light emitting diodes (LEDs) designed for moth control in the cultivation of small-flowered spray-type chrysanthemums. The pulses had a 20 ms pulse width and a 80 ms dark period. The effects of the irradiance of pulsed light (0, 20, 35 and 50 mW·m⁻²) on the flowering and the cut flower characteristics have been investigated. No significant differences were found in the number of days to flower budding and flowering, flower formation, and on the cut flower characteristics grown using an irradiance of 20 mW·m⁻². However, in some cultivars, the number of days to flowering and the cut flower length of plants exposed to 35 and 50 mW·m⁻² irradiance increased significantly compared to unexposed plants.<br>

DOI： 10.2503/hrj.12.419

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Influence of Environmental Conditions on the Chrysanthemum Leaf Yellow Spot - Measurement of the Leaf Yellow Spot at Early Stage -

Naoki Eguchi, Kazuhiko Namba, Mitsuji Monta, Tanjuro Goto

IFAC Proceedings Volumes   46 ( 4 )   366 - 371   2013

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DOI： 10.3182/20130327-3-jp-3017.00082

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Effects of Gibberellic Acid Application after Flower Budding on the Flowering and Cut Flower Quality of Summer-to-autumn Flowering Small-flowered Spray Type Chrysanthemums Harvested in August Reviewed

Yoshio Mori, Shinsuke Kono, Tanjuro Goto

Horticultural Research (Japan)   12 ( 1 )   103 - 108   2013

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DOI： 10.2503/hrj.12.103

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Influence of environmental conditions on the chrysanthemum leaf yellow spot - Measurement of the leaf yellow spot at early stage

Naoki Eguchi, Kazuhiko Namba, Mitsuji Monta, Tanjuro Goto

IFAC Proceedings Volumes (IFAC-PapersOnline)   1 ( PART 1 )   2013

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In recent years, yellow spots appear on the leaf of chrysanthemums in many species, which brought commercial problems. The purpose of this study is to examine the measurement of the spot in order to make the influence of environmental conditions clear. Image instrumentation with transmitted light made possible to measure the spot at early stage, which was difficult for reflected light. The method is used the gap of the light quantity between the spot and others. It is involved in chlorophylls and the use of the suitable light color make measuring easy. The portable device using this method was produced experimentally and leaf yellow spot was measured with this device, which brought the basic data, the state get worse with time and the relationship between the spot and environmental conditions.

DOI： 10.3182/20130327-3-jp-3017.00082

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Effect of Solution Strength and Fruit Thinning on Nutrient Uptake, Yield, and Fruit Quality of Strawberry ^|^lsquo;Nyoho^|^rsquo; Grown with Sufficiently Elevated CO2 Reviewed

Daichi Inazumi, Yuichi Yoshida, Tanjuro Goto, Kenji Murakami

Horticultural Research (Japan)   12 ( 3 )   273 - 279   2013

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DOI： 10.2503/hrj.12.273

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日長，補光強度，遮光時期および最低夜温がシュッコンカスミソウ ‘アルタイル’の形態異常花序発生に及ぼす影響

山口訓史, 後藤丹十郎, 小日置佳世子, 大谷翔子, 吉田裕一

岡山大学農学部学術報告   102   29 - 34   2013

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培養液中Ca濃度が根域制限したトマト果実の水溶性Ca濃度と尻腐れ果発生に及ぼす影響

吉田裕一, 新開 礼, 大山光男, 村上賢治, 後藤丹十郎

岡山大学農学部学術報告   102   21 - 28   2013

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培養液濃度と施用量が高CO2濃度条件下で育てたイチゴ‘さがほのか’の生育・収量と果実品質に及ぼす影響

稲角大地, 吉田裕一, 後藤丹十郎, 村上賢治

岡山大学農学部学術報告   102   15 - 20   2013

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防蛾用黄色LED光がキクの開花反応に及ぼす影響

石倉 聡, 梶原真二, 福島圭吾, 後藤丹十郎

岡山大学農学部学術報告   102   35 - 41   2013

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Development of an Insect Pest Control System using Pulsed Light from a Yellow-LED in the Production of Autumn-flowering Chrysanthemums : Investigation of an Appropriate Irradiance Range for the Production of Autumn-flowering Chrysanthemums Reviewed

ISHIKURA Satoshi, GOTO Tanjuro, HIRAMA Junji, YAMASHITA Shinichi, NOMURA Masashi, YOON Jungbeom

Shokubutsu Kojo Gakkaishi   24 ( 4 )   244 - 251   2012.12

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In order to develop an insect pest control device using pulsed light from a yellow LED, the dependency of the production of autumn-flowering chrysanthemums on the irradiance was investigated. The Electro-Retino Gram (ERG) signals of the compound eyes of Helicoverpa armigera and Spodoptera litura due to irradiation with pulsed yellow light with 20 ms pulse width and 100 ms period were determined over the irradiance range from 1 to1000 mW m^-2. The ERG signals showed that these 2 types of noctuid moth continuously and reproducibly recognized pulsed illumination within the irradiance range from 1 to 100 mW m^-2. Therefore, the effects of the irradiance of pulsed light from a yellow LED (0，20，35 and 50 mW m^-2) on flowering and the cut flower characteristics of the autumn-flowering chrysanthemum, 'Zimba', were determined. No significant differences were found in the number of days to flower budding or flowering, or the cut flower characteristics below35 mW m^-2. However, the number of days to flowering and the cut flower length of plants exposed to 50 mW m^-2 irradiance increased significantly compared to those exposed at other irradiances. Thus, no delay in flowering occurred below 35 mW m^-2 irradiance and the maximum irradiance for which no delay occurred is between 35 and 50 mW m^-2.

DOI： 10.2525/shita.24.244

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Flower Induction in June-bearing Strawberry by Intermittent Low Temperature Storage Reviewed

Yuichi Yoshida, Eiji Ozaki, Kenji Murakami, Tanjuro Goto

JOURNAL OF THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE   81 ( 4 )   343 - 349   2012.10

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In this paper, we describe a new artificial flower-inducing treatment, intermittent low temperature storage, which we suggest could be a low-cost and useful technology for the forcing of June-bearing strawberries. Tray-grown 'Nyoho' plants were placed in a refrigerator (13 degrees C, in the dark) for 4 days and then transferred to an outdoor shelter with 50% shading, also for 4 days (4D/4D). Plants were transferred at noon and this 4D/4D cycle was repeated twice. Similarly, 3D/3D and 2D/2D cycles were applied 3 and 4 times, respectively. The outdoor conditions during the period of treatment from late August to mid-September were as follows: mean daily temperature, 22.5 to 29 degrees C; and day length (sunrise to sunset) 12.2 to 13.1 h. The efficient use of a refrigerator could be achieved by alternately subjecting two groups of plants to the same duration of low temperature in the dark and outdoor conditions. Treated plants were grown on peat bags and flowering performance was compared with untreated controls and continuously cold-stored (12D) plants. In intermittently cold-stored plants, flowering was significantly earlier than that in untreated controls by 6 to 10 days. Compared to the continuous 12D plants, flowering was 15 and 4 days earlier in 4D/4D plants within the plots planted on September 13 and 17, respectively. The 2 to 4 days under outdoor conditions imposed in the low temperature storage apparently induced uniform flower initiation through the improvement of carbohydrate nutrition in strawberries. Although further studies are required to establish the most effective treatment procedures, intermittent low temperature storage could be a useful new flower-inducing technology for early forcing of June-bearing strawberries.

DOI： 10.2503/jjshs1.81.343

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気温および地温がキク‘精興の誠’の黄斑発生に及ぼす影響

後藤丹十郎, 山口訓史, 藤田紫乃, 四谷亮介

岡山大学農学部学術報告   101   33 - 37   2012

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Effects of Fertigation Management Based on Apparent Nitrogen Absorption Concentration on Cut Flower Yield, Characteristic Form and Nitrate Nitrogen Concentration of Soil Solution in Carnation 'Nora' Reviewed

Yamanaka Masahito, Goto Tanjuro, Ogawa Kinoe, Uda Akira, Miyaura Toshifumi, Yamaguchi Kunio

Hort. Res. (Japan)   10 ( 4 )   475 - 483   2011

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To develop simple and versatile fertilizer management in cultivation by fertigation of carnations (Dianthus caryophyllus L.), the effects of fertilizer management by apparent nitrogen absorption concentration on cut flower yields, characteristic form and soil solution concentration were investigated using the cultivar 'Nora'. Cut-flower yield by the four-split (seasonally-split) application method was highest among treatments and that by the twelve-split (monthly-split) application method was higher than that of the fixed application method. The cut flower weight (g)/length (cm) ratio of the fixed application method was smaller than that of the twelve-split application method between 33 and 36 weeks after the beginning of harvest. There were differences in EC and nitrate nitrogen concentration between the different methods of treatment. The nitrate nitrogen concentration of soil solution in each treatment ranged from 8 to 169 ppm, from 54 to 103 ppm, and 21 to 108 ppm for the four-split, twelve-split and fixed application methods, respectively, 20 weeks after the beginning of harvest. Fluctuation in the fixed application method was the greatest among the treatments, fluctuation in the four-split application method was least among the treatments examined, and the nitrate nitrogen concentration of soil solution was maintained at an optimal concentration level for the growth of carnations throughout the cultivation period.<br>

DOI： 10.2503/hrj.10.475

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Characteristics of Water Consumption in Winter-Spring Harvest Cropping Type of Carnation Reviewed

Yamanaka Masahito, Goto Tanjuro, Uda Akira, Iwai Toyomichi, Higashiura Masaru

Hort. Res. (Japan)   10 ( 1 )   33 - 40   2011

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We investigated the effects of flower bearing types and pinching methods on the characteristics of water consumption in winter-spring harvest cropping type of carnation (Dianthus caryophyllus L.) in order to develop liquid fertilizer management of cultivation by fertigation. The standard type 'Nora' and spray type 'Barbara' were cultivated by bottom fertigation with single pinching or double pinching. The amount of daily water consumption changed with cultivation time, the amount of daily water consumption was lowest in summer for the early cultivation time and greatest in spring for the later cultivation time. The total amount of water consumption for 'Nora' grown by single pinching was 32.29 L (per plant), that of 'Nora' grown by double pinching was 35.26 L, that of 'Barbara' grown by single pinching was 29.75 L and that of 'Barbara' grown by double pinching was 30.29 L. There was a positive correlation between the amount of water consumption over 4 weeks and the number of leaves during those 4 weeks. There was a positive correlation between the amount of daily water consumption and the daily integrated solar radiation 4 weeks after planting. The amount of water consumption (y: L·plant⁻¹·4 weeks⁻¹) could be estimated by a regression line between the integrated solar radiation (X₁: MJ·m⁻²·4 weeks⁻¹) and the leaf number at that time (X₂: per plant) as follows; y = 0.00697X₁ + 0.00930X₂ − 1.36616, regardless of cultivar or pinching methods. Moreover, the amount of water consumption could be estimated by solar radiation alone starting 12 weeks after planting.<br>

DOI： 10.2503/hrj.10.33

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Effects of polyethylene pot removal and irrigation method on growth and flowering of garden-type cyclamen Reviewed

Goto, T, Shimizu N, Koma Y, Morishita T, Fujii K, Nakano Y, Shima K

Acta Horticulture   886   83 - 90   2011

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種子のロットおよび採種時期がブプレウルムの生育、開花および切り花形質に及ぼす影響

後藤丹十郎, 石井真由美, 藤原一毅

岡山大学農学部学術報告   100   25 - 29   2011

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スプレーカーネーションの灌水同時施肥栽培における栽植方式が収量および切り花品質に及ぼす影響

山中正仁, 後藤丹十郎, 東浦 優

岡山大学農学部学術報告   100   31 - 37   2011

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1A1-B05 Mobile eggplant grading robot : Discriminating experiment of plants by using IC tags

YAMAMOTO Chikafumi, MONTA Mitsuji, NAMBA Kazuhiko, GOTO Tanjuro

The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec)   2010   _1A1 - B05_1-_1A1-B05_3   2010

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In the progress of precision farming, it is very important to collect variety of information on crops and field. In this study, we developed a prototype mobile eggplant grading robot in order to get information that be used for presentation of better way on cultivation. This robot can collect and accumulate the fruit's features information and location information at the same time while harvesting. After the field test experiment, a prototype mobile eggplant grading robot has achieved its purpose which was acquiring and storing information in real time and has created field spatial maps from the information. In the previous experiments, a rotary encoder was used in order to discriminate plant location based on the distance from the start point of the robot. However, the detecting error of the distance increased in proportion to the travelling distance of the robot because of the slip of the rotary encoder. In this paper, the robot discriminated plants by using IC tags attached to individual plants and a transmitter-receiver mounted on the robot. From the results, the robot could discriminate individual plants correctly.

DOI： 10.1299/jsmermd.2010._1A1-B05_1

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給液濃度がかん水同時施肥法で栽培したスプレーカーネーションの切り花収量と品質および時期別養分吸収特性に及ぼす影響

山中正仁, 後藤丹十郎, 小河 甲, 宇田 明, 岩井豊通

岡山大学農学部学術報告   99   55 - 62   2010

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Effect of Dissolved Oxygen Concentration in Irrigation Water on the Growth and Postproduction Quality of Potted Cyclamen Using the Ebb & Flow System Reviewed

MAEDA Shigeichi, NAKA Terufumi, SUMIKAWA Yuka, GOTO Tanjuro

Shokubutsu Kojo Gakkaishi   21 ( 4 )   169 - 174   2009.12

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We investigated the effects of the dissolved oxygen (DO) concentration in irrigation water on the growth and postproduction quality of potted cyclamen (Cyclamen persicum Mill.), grown using a recirculating Ebb & Flow subirrigation system (Ebb & Flow system). Four levels of DO were set: 4∼6 ppm (control, no air supply), 7∼9 ppm, 15∼18 ppm, and 30∼35 ppm, using an air compressor and two types of oxygen generator. The increase in the DO concentration of irrigation water caused a rise in the pH, but no alkalization of substrates or physiological damage of potted cyclamen was observed during cultivation. The results indicated that growth suppression during a high-temperature period was avoided by treatment with over 15 ppm DO; therefore, the growth and start of flowering of cyclamen were accelerated during the total cultivation period. Moreover, the results showed that the postproduction quality of cyclamen under floral display conditions at a low-light intensity was degraded easily over 15 ppm DO, but it was maintained for longer with 7∼9 ppm DO. From the above results, when the DO concentration in irrigation water was fixed until shipment, we considered that treatment with 7∼9 ppm DO, which facilitated a higher postproduction quality, was more desirable for potted cyclamen production with the Ebb & Flow system.

DOI： 10.2525/shita.21.169

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Effects of increased water evaporation from the medium on medium temperature and the growth of pansy and cyclamen during high temperature period Reviewed

Nakano Y, Maeda S, Goto T, Higashide T, Kinoshita T, Yoshikawa H

Hort. Res.   8 ( 4 )   475 - 481   2009.10

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To improve the growth and development of pansy (Viola × wittrockiana Gams) and cyclamen (Cyclamen persicum Mill.) nursery plants in summer, we investigated the effects of increased water evaporation from medium on medium temperature and plant growth. Medium temperature declined when the polyethylene pot was removed using the soil cast with heat-adhesive polyester fiber. Air blowing on the surface of the medium promoted a cooling effect. Although either removing the pot or blowing air was likely to enhance the growth and development of these plants, simultaneous application of both treatments was more effective during high temperature periods. In pansy plants, these treatments lowered the leaf temperature and plant death rate, and increased the shoot dry matter. The number of leaves and floral buds, and shoot dry matter of cyclamen plants cultivated with these treatments were larger than those of non-treated plants.<br>

DOI： 10.2503/hrj.8.475

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Effect of Types of Media Hardened by the Heat Fusion of Polyester Fibers on Yield of Cut Flower Stems and the Characteristic Form of Rose, and on the Fluctuation of Nutrient Solutions in Closed Hydroponic Culture Reviewed

Kajihara Shinji, Nobuyasu Hiroyuki, Katsutani Noritoshi, Goto Tanjuro

Hort. Res. (Japan)   8 ( 1 )   61 - 66   2009

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The effects of using media hardened by heat fusion of polyester fibers on yields and quality of cut flower stems 'Asami·Red' (syn. 'Rote Rose') rose and on the composition of nutrient solutions for a year under closed hydroponic culture were investigated. The yields of cut flower stems grown in vermiculite medium (grain diameter: 6–7 mm) and coconut coir medium (fiber length: 3 mm) were remarkably higher than those grown in rockwool and perlite medium (grain diameter: 0.6–1.5 mm or 2.5 mm). The weight of a cut flower stem did not differ among the media, however stem lengths from both grain perlite media were shorter than those from other media. Eighteen months after transplanting, the length and width of each medium were the same as those just after planting, and the thickness in rockwool and coconut coir media decreased slightly. The solidity of each medium remained almost the same at the termination of the project. The pH of the nutrient solution in the rockwool medium changed the most, becoming higher than that of the other media for most of the time. The EC in coconut coir medium tended to be high throughout the project. The concentration of NH₄-N decreased, while other inorganic components increased gradually. In conclusion, the vermiculite or coconut coir media hardened by heat fusion of polyester fibers is the most favorable of alternative media tested in comparisons with rockwool medium under closed hydroponic culture.<br>

DOI： 10.2503/hrj.8.61

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Partitioning of Photosynthate Originating from Bent Shoots in the Arching and High-rack Culture Systems of Rose Production Reviewed

Shinji, Kajihara, Junki Itou, Noritoshi Katsutani, Tanjuro Goto, Hideo Shimaji

Scientia Horticulturae   121   485 - 489   2009

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頭上灌水と底面灌水の組み合わせが熱融着性ポリエステル繊維固化ポットレス培地で育てた花壇苗の生育に及ぼす影響

大橋佑司, 後藤丹十郎, 清水 希, 小間康史, 森下照久, 藤井一徳, 島 浩二

98   17 - 22   2009

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熱融着性ポリエステル繊維で固化した屋上基盤における一年生草本の施肥管理技術 Reviewed

末留 昇, 長澤淳一, 豊原憲子, 藤井一徳, 後藤丹十郎, 島 浩二

近畿中国四国農業研究   14   14 - 19   2009

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塩化ナトリウムを添加した液肥処理がパンジーの生育に及ぼす影響

島 浩二, 前田茂一, 後藤丹十郎

和歌山農林水産総合技術センター研究報告   10   1 - 6   2009

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Characteristic of the bedding flower seedlings that raised in media hardened by heat fusion polyester fiber and investigation of a simple wall greening method by use these seedlings(PAPERS AND REPORTS OF THE 39TH SCIENTIFIC RESEARCH MEETING) Reviewed

TOYOHARA Noriko, YOSHIKAWA Hiroyasu, SUETOME Noboru, GOTO Tanjyuro, NAMURA Sukeyasu, SHIMA Koji

Journal of the Japanese Society of Revegetation Technology   34 ( 1 )   103 - 108   2008.8

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A new media hardened by heat fusion polyester fiber has a characteristic that stanch the flow of media materials by watering. By raising bedding flower seedlings in the media, these materials were bound strongly with the growth of the plant, and penetration resistance of the media grew stronger. Pretreatment of slow release fertilizer for the media, it could keep flowering on the seedlings by only watering. 9cm diameter size media just fitted on 5.5cm pitch net-fence. This media was able to make wall greening quickly without using new base or soil. In summer high temperature, to keep the media wet condition and to send wind for them, the temperature of media were cold down and the ambient temperature of greening face was also cold down.

DOI： 10.7211/jjsrt.34.103

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キク‘精興の誠’の黄斑発生を助長する温度条件 Reviewed

7 ( 2 )   235 - 240   2008

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DOI： 10.2503/hrj.7.235

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Effect of plug transplant age and photoperiod treatment at seedling stage on cut flower quality of Celosia cristata L. Reviewed

Tanjuro Goto, Yuki Muraoka

Acta Horticulture   782   201 - 206   2008

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Celosia cristata L. Kurume type is a quantitative short-day plant with entirely globular inflorescences that is popular as a cut flower in Japan. The photoperiod sensitivity limits production and this could be overcome by prolonging its seedling stage by long-day treatments. In this study, the effects of transplant age and long-day treatment at seedlings stage on cut flower quality of C cristata Kurume type cv. Sakata-pride were investigated. Plug transplants raised under 15h (natural day length) or 24-h photoperiods in a greenhouse were transplanted into wooden containers when two, four or eight leaves had unfolded. Flower bud initiation had already occurred in transplants with eight unfolded leaves grown in natural but not in 24-h day length. Days to visible bud were prolonged by 24-h treatment. The cut flowers grown in 24h were longer than those grown in natural day length. The weight of cut flower and inflorescence decreased as transplant age increased. The inflorescence form changed from globular to flat as transplant age increased. The youngest transplants had the highest cut flower quality. These results suggest that in order to produce highly marketable quality cut flowers of C cristata Kurume type, the plug transplants must be planted before 4 leaves unfold, and that prolonging the seedling stage may be difficult through long-day treatment.

DOI： 10.17660/ActaHortic.2008.782.23

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Development of mobile eggplant grading robot for dynamic in-field variability sensing: Manufacture of robot and performance test Reviewed

Vui Kiong Chong, Mitsuji Monta, Kazunori Ninomiya, Naoshi Kondo, Kazuhiko Namba, Eichi Terasaki, Takao Nishi, Tanjuro Goto

Engineering in Agriculture, Environment and Food   1 ( 2 )   68 - 76   2008

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier B.V.  

A machine vision-based mobile eggplant grading robot was developed as a model to sense and log essential data needed for precision farming and traceability of agricultural crops. The robot consisted of battery railcar, trailer, grading mechanisms including manipulator, end-effector, machine vision and divider. Manually operated, the robot moved along crop ridges during the harvesting process with the grading mechanisms all mounted on the trailer. The robot sensed and logged the field spatial variability dynamically by grading manually harvested eggplant fruit of individual tree. This paper presents the details of manufactured robot and results of the performance test conducted. Test results showed that the robot was feasible for field spatial variability sensing in greenhouse.

DOI： 10.1016/S1881-8366(08)80005-5

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培地の形状，施肥方法，栽植密度が熱融着性ポリエステル繊維固化ポットレス培地で育てたパンジーの生育に及ぼす影響

後藤丹十郎, 大橋佑司, 清水 希, 森下照久, 藤井一徳, 石川順也, 島 浩二

岡山大学農学部学術報告   97   61 - 67   2008

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キク‘精興の誠’の黄斑発生を助長する温度条件 Reviewed

長菅香織, 後藤丹十郎, 矢野孝喜, 山崎博子, 稲本勝彦, 山崎篤

Horticultural Research (Japan)   7 ( 2 )   235 - 240   2008

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DOI： 10.2503/hrj.7.235

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熱融着性ポリエステル繊維固化培地で育成したパンジーのプランター定植後の生育

島 浩二, 川西孝秀, 矢部泰之, 森下照久, 藤井一徳, 後藤丹十郎

和歌山農林水産総合技術センター研究報告   9   15 - 19   2008

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1A1-G03 Mobile Eggplant Grading Robot : Construction of prototype and field test

CHONG Vui Kiong, MONTA Mitsuji, NINOMIYA Kazunori, KONDO Naoshi, NAMBA Kazuhiko, NISHI Takao, GOTO Tanjuro

The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec)   2007   _1A1 - G03_1-_1A1-G03_4   2007

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Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society of Mechanical Engineers  

Precision Farming practices that required GIS and GPS system are too costly and impractical for small-scale farm. However, site-specific management is still necessary as it contribute in reducing the operation cost and also over usage of pesticides chemicals. A new approach in generating yield and quality map for small scale farm using mobile grading robot has been carried out. A prototype mobile eggplant grading robot was constructed and field test was done. The mobile robot consists of a battery railcar with the grading unit trailer hauled behind. Eggplant fruits were harvested manually and passed to the grading robot. Features information of the eggplant was taken simultaneously with the harvesting location information to create field variability map. Observations found that the constructed prototype robot was capable of accumulating the field variability information during the field test.

DOI： 10.1299/jsmermd.2007._1A1-G03_1

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セルシート育苗を利用したキクの直接短日定植法の可能性 Reviewed

仲照史, 山口訓史, 後藤丹十郎, 水田洋一, 角川由加, 前田茂一

近畿中国四国農業研究   11   46 - 51   2007

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Effect of Nutrient Levels and Mineral Composition on the Occurrence of Leaf-yellow-spot in Chrysanthemum

Oki, A, T. Goto, K. Nagasuga, A. Yamasaki

Sci. Rep. Fac. Agri. Okayama Univ   96   43 - 48   2007

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根域容量と日射比例給液制御による給液量がトマトの生育・収量と果実品質に及ぼす影響

吉田裕一, 松野太樹, 新開 礼, 後藤丹十郎

岡山大学農学部学術報告   96   37 - 42   2007

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熱融着性ポリエステル 繊維固化ポットレス培地で育成したペチュニアの生育に及ぼす灌水方法の影響

後藤丹十郎, 島 浩二, 東 千里, 森下照久, 藤井一徳, 元岡茂治

岡山大学農学部学術報告   95   29 - 34   2006

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Flowering of Zantedeshia rehmannii Engl. as affected by combination of tuber storage temperature and duration Reviewed

Goto, T, Kawajiri K, Kageyama Y, Konishi K

Acta Horticulture   639   273 - 279   2005

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Increasing the Length of the Transplanting Period of Gypsophila paniculata L. Cuttings Grown in Cell Medium Hardened by Heat Fusion Polyester Fiber Reviewed

Goto Tanjuro, Fujii Kazunori, Motooka Shigeharu, Konishi Kuniyoshi

Horticultural Research (Japan)   4 ( 1 )   17 - 20   2005

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Rooting, growth and cut flower quality of Gypsophila paniculata L. cuttings grown in cell medium hardened by heat fusion polyester fiber was investigated. Rooting percentages of hardened media were not affected by medium compositions and were higher than those without hardened media. Moreover, the hardened media did not break down whenever root-ball was not formed. Regardless of transplantation age, hardened medium had little effect on transplant growth and cut flower quality. Hardened medium had no effect on the formation of succulent roots. Therefore, we developed a method of transplanting young cuttings before the root-ball formed using the harden cell medium.

DOI： 10.2503/hrj.4.17

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培地および定植期がキク‘精興の誠’の黄斑発生に及ぼす影響

後藤丹十郎, 沖 章紀, 景山詳弘

岡山大学農学部学術報告   94   15 - 18   2005

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スプレーギクのベンチ栽培における見かけの養分吸収濃度に基づいた灌水同時施肥栽培法の開発

島 浩二, 後藤丹十郎, 景山詳弘

岡山大学農学部学術報告   94   19 - 24   2005

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スプレーギクのベンチ栽培における施肥方法が切り花品質と養分吸収に及ぼす影響 Reviewed

3 ( 1 )   23 - 26   2004

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DOI： 10.2503/hrj.3.23

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Effects of Nutrient Level at Planting Time on Growth and Quality of Cut Flower in Spray Chrysanthemums Reviewed

Shima Kohji, Goto Tanjuro, Kageyama Yoshihiro

Hort. Res. (Japan)   3 ( 2 )   155 - 160   2004

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Effects of the nutrient level at planting time on growth and quality of cut flower in spray chrysanthemums were investigated. An equal amount of fertilizer measuring approximately N 267 mg/shoot was applied to each plot with different basal fertilizer ratios of 0 %, 25 %, 75 % and 100 %, respectively. The residual nutrients divided into 10 equal dosages were applied every week. For reference, fertilizer was also applied according to the conventional recommended method (N 500 mg/shoot).<br> Initial growth of plants in 25 % and 50 % plots was better than that in the other plots. Necrosis due to excessive fertilization was observed in the leaves of plants in the 75 % and 100 % plots. Regardless of the ratio of basal fertilizer to total application, the quality of cut flowers was good and marketable. The quality of cut flowers from the conventional plot was lower than that from other plots due to excessive growth of leaves and stems.<br> It is desirable to maintain the initial nutrient levels at planting time in a range between 50 and 300 ppm nitrate using a soil solution in spray chrysanthemum production.<br>

DOI： 10.2503/hrj.3.155

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スプレーギクのベンチ栽培における季節別の水消費量

島 浩二, 後藤丹十郎, 景山詳弘

岡山大学農学部学術報告   93   33 - 37   2004

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培養液中NaCl濃度がピートバッグ栽培イチゴの生育，収量と品質に及ぼす影響 Reviewed

2 ( 3 )   171 - 174   2003

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DOI： 10.2503/hrj.2.171

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セル培地に必要な散水量と植物体の大きさの関係

後藤丹十郎, 吉田裕一

岡山大学農学部学術報告   92   27 - 30   2003

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Effect of Fertilization Application Levels Based on the Nitrogen Application Standard Curve on Cut Flower Quality and Nutrient Uptake of Spray Chrysanthemums in Bench Culture Reviewed

Shima Kohji, Goto Tanjuro, Kageyama Yoshihiro

Hort. Res. (Japan)   1 ( 4 )   249 - 254   2002

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The effects of nutrient application based on the nitrogen application standard curve (NASC) developed in the hydroponics system on the cut flower quality and nutrient uptake of spray chrysanthemums in bench culture were investigated. Plants were grown at 0.75, 1.0, 1.25 and 1.5 strengths of NASC, including 356, 474, 593, 711 mg total nitrogen/shoot, respectively.<br> About 80% of harvested flowers were marketable flowers having the weight of ≧ 40 g when the lower 20 cm leaves were trimmed after cutting on 80 cm shoot (the shipping standard size in Wakayama) in all application levels. Using the 0.75 strength, there was little residual nitrogen in the soil at harvest. However, Using treatments of ≧ 1.0 strength, an accumulation of nitrogen in the soil was detected during the cultivation period. The residual nutrients in the soil increased with increases in the fertilization level.<br> Consequently, nutrient application based on 0.75 NASC strength can produce high quality cut flowers in bench culture, and is suitable for the environment due to the low levels of nutrients remaining in the soil. Modification of NASC is recommended to improve plant growth in the early stages.<br>

DOI： 10.2503/hrj.1.249

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Growth and Cut Flower Quality of Stock (Matthiola incana R. Br.) and Snapdragon (Antirrhinum majus L.) Seedlings Grown in Cell Medium Hardened by Heat Fusion Polyester Fiber Reviewed

Goto Tanjuro, Fujii Kazunori, Motooka Shigeharu, Konishi Kuniyoshi

Hort. Res. (Japan)   1 ( 4 )   245 - 248   2002

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Growth and cut flower quality of stock (Matthiola incana R. Br.) and snapdragon (Antirrhinum majus L.) seedlings grown in cell medium hardened by heat fusion polyester fiber were investigated. In both species, hardened medium had no effect on germination rate and percentage. The media hardened by heat fusion polyester fiber did not break down, regardless of root-ball formed. Regardless of species and transplant age, hardened medium had little effect on transplant and cut flower quality. Hardened cell medium was easy to transplant since it did not break down and was therefore considered effective for transplanting yound seedlings before root-ball formed.<br>

DOI： 10.2503/hrj.1.245

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自動底面灌水によるストックのセル苗生産（第2報）日射比例灌水法および定時灌水法における灌水頻度がセル苗の生長と生産性に及ぼす影響 Reviewed

後藤丹十郎, 藤本裕也, 吉田裕一, 景山詳弘

植物工場学会誌   14   87 - 91   2002

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Photosynthetic, Evapotranspiratory and Leaf Morphological Properties of Chrysanthemum Grown under Root Restriction as Affected by Fertigation Frequency Reviewed

Tanjuro Goto, Taiki Matsuno, Yuichi Yoshida, Yoshihiro Kageyama

J.of Japan Soc.Hort.Sci   71 ( 2 )   277 - 287   2002

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This experiment was conducted to clarify the effect of fertigation frequency (once or 8 times per day) on the growth, evapotranspiration rate, and photosynthetic and leaf morphological properties of chrysanthemum (Dendranthema grandiflorum Kitamura cv. Pinky) grown under different restricted root zone volumes (30, 100, and 300 ml). Shoot growth was reduced with decreased root zone volume, but, the growth reduction was smaller when the plants were fertigated 8 times per day rather than once per day. Although the evapotranspiration rate did not decrease when the plants were fertigated frequently, the rate decreased significantly when the total water consumption nearly equaled the water-holding capacity of the medium (50% of the volume), especially in 30-ml or 100-ml containers. Stomata size decreased with a decrease in fertigation frequency and container size. The percentage of open stomata (open/total stomata × 100) and consequently, transpiration rate, net photosynthetic rate, and leaf CO_2 concentration were significantly lower in the plants grown in 30-ml and 100-ml containers, and fertigated once per day, compared to the four other treatments. The rates of photosynthesis and evapotranspiration of the plants fertigated 8 times per day remained faster than those fertigated only once per day. Consequently, vegetative growth of the plants fertigated frequently was equal to or more vigorous than those grown with three fold greater root zone volume but fertigated only once per day.

DOI： 10.2503/jjshs.71.277

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自動底面灌水によるストックのセル苗生産（第1報）蒸発散量と環境要因，特に日射量との関係について Reviewed

後藤丹十郎, 山田祐介, 藤本裕也, 吉田裕一, 景山詳弘

植物工場学会誌   14   81 - 86   2002

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Effects of Water and Nutrient Stresses on Reduction of Vegetative Growth in Chrysanthemum Grown under Restricted Root Zone Volume. Reviewed

Tanjuro Goto, Noriyuki Takaya, Naoko Yoshioka, Yuichi Yoshida, Yoshihiro Kageyama, Kuniyoshi Konishi

Engei Gakkai zasshi   70 ( 6 )   760 - 766   2001

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DOI： 10.2503/jjshs.70.760

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セル内培地からの排水促進が宿根性花きの挿し穂の発根に及ぼす影響

後藤丹十郎, 景山詳弘, 小西国義

農業および園芸   76   531 - 534   2001

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カーネーションおよびシュクコンカスミソウのセル成型育苗に関する研究−セルの容量と育苗期間が移植後の生長と切り花品質に及ぼす影響− Reviewed

後藤丹十郎, 景山詳弘, 小西国義

園芸学会雑誌   69   749 - 757   2000

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ＮＦＴ栽培における培養液量がスプレイギクの養分吸収と切り花品質に及ぼす影響 Reviewed

尹 恵淑, 後藤丹十郎, 景山詳弘

生物環境調節   38   121 - 127   2000

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Developing a Nitrogen Application Curve for Spray Chrysanthemums grown in Hydroponic System and its Practical Use in NFT System. Reviewed

Hae Suk Yoon, Tanjuro Goto, Yoshihiro Kageyama

Engei Gakkai zasshi   69 ( 4 )   416 - 422   2000

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DOI： 10.2503/jjshs.69.416

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Effects of root zone volume on the growth of snapdragon seedlings under optimum nutrients and water supply Reviewed

Goto, T, Sagawa, T, Kageyama, Y, Konishi, K

Acta Horticulturae   511   233 - 238   2000

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Mineral uptake as influensed by growing seasons and developmental stages in spray chrysanthemums grown under a hydroponic system Reviewed

Yoon, H. S, Goto, T, Kageyama, Y

1 ( 4 )   249 - 254   2000

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DOI： 10.2503/hrj.1.249

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播種期および施肥濃度がストックセル成型苗の生育に及ぼす影響

後藤丹十郎, 正岡啓史, 景山詳弘, 小西国義

農業および園芸   75   1227 - 1231   2000

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輪ギクの品質評価に関する研究（第1報）専門家の評価基準とキクの形態的特徴との関係 Reviewed

近藤直, 後藤丹十郎, 門田充司, 村瀬治比古

植物工場学会誌   11   93 - 99   1999

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輪ギクの品質評価に関する研究（第2報）カルマンニューロを用いた評価 Reviewed

近藤直, 村瀬治比古, 門田充司, 後藤丹十郎

植物工場学会誌   11   100 - 105   1999

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セル苗育苗におけるセル容量および移植時苗齢がキンギョソウの移植後の生長と開花ならびにストックの移植後の初期生長に及ぼす影響

後藤丹十郎, 景山詳弘, 小西国義

岡山大学農学部学術報告   88   47 - 55   1999

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セル成型苗育苗の低温貯蔵期間および温度がキク，シュッコンカスミソウおよびカーネーションの移植後の初期生長に及ぼす影響

後藤丹十郎, 正岡啓史, 景山詳弘, 小西国義

岡山大学農学部学術報告   87   141 - 148   1998

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根域容量がシュクコンカスミソウ、カーネーションおよびキクの主枝と側枝の生長に及ぼす影響

後藤丹十郎, 景山詳弘, 小西国義

岡山大学農学部学術報告   86   43 - 49   1997

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Effect of potassium and calcium concentration in the nutrient solution on growth and nutrient uptake of rose plants Reviewed

Terada M, Goto, T, Kageyama, Y, Konishi, K

Acta Horticulturae   440   366 - 370   1996

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スターチス・シヌアータの挿し芽苗による促成栽培

後藤丹十郎, 山登千恵, 景山詳弘, 小西国義

岡山大学農学部学術報告   85   31 - 37   1996

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Reducing of Tomato Puffiness in Auxin-Induced Parthenocarpic Fruits by Forchlorfenuron (1- (2-chloro-4-pyridyl) -3-phenylurea). Reviewed

Kataoka Keiko, Date Syuichi, Goto Tanjuro, Asahira Tadashi

Journal of the Japanese Society for Horticultural Science   63 ( 1 )   61 - 66   1994

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Synthetic auxin treatment for promoting the fruit growth of tomato without pollination sometimes causes puffy fruits. The newly developed cytokinin-like substance, forchlorfenuron (1- (2-chloro-4-pyridyl) -3-phenylurea, CPPU). when applied at anthesis, reduces tomato puffiness of auxin-induced parthenocarpic fruits. Addition of 50300 mg•liter^-1 to an auxin solution did not decrease fruit weight but thickened the peduncle, enlarged columella, and elongated the calyxes beyond those of the control fruits.

DOI： 10.2503/jjshs.63.61

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Other Link： http://agriknowledge.affrc.go.jp/RN/2010501479

アスパラガスの1年生株を用いた促成伏せ込み栽培−品種、根株重、伏せ込み床の温度、根株の低温貯蔵期間及び根株の掘り上げ時期について−

後藤丹十郎, 吉田裕一, 片岡圭子, 稲本勝彦, 行永寿二郎

京大農場報告   4   1 - 8   1994

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イチゴ‘愛ベリー’の果実生長に対する摘果の効果

吉田裕一, 後藤丹十郎, 時実充洋

京大農場報告   3   7 - 11   1993

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イチゴ雌ずいの形態と受精能力の開花後の変化 Reviewed

吉田裕一, 後藤丹十郎, 中條利明, 藤目幸広

園芸学会雑誌   60   345 - 351   1991

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Classification of Japanese bunching onion (Allium fistulosum L.)．

Inden, H, Yamasaki, A, Goto, T, Asahira, T

Proceedings of International Simp. on Horticultural Gerplasm. Cultivated and Wild. 2 Vegetables   2   163 - 167   1989

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