Faculty Profiles - GOTO Tanjuro

Papers - GOTO Tanjuro

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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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

CiNii Article

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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

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

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

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

Web of Science

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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

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

Web of Science

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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

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

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

Web of Science

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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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Papers - GOTO Tanjuro