Updated on 2025/09/30

写真a

 
Tanaka Yu
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Associate Professor
Position
Associate Professor
External link

Degree

  • Ph.D (Agronomy) ( 2011.3   Kyoto University )

Research Areas

  • Environmental Science/Agriculture Science / Crop production science

 

Papers

  • Genetic diversity of leaf photosynthesis under fluctuating light conditions among temperate japonica rice varieties

    Kazuki Taniyoshi, Sotaro Honda, Airi Miyamoto, Naomi Asagi, Makoto Matsuoka, Wataru Yamori, Yu Tanaka, Shunsuke Adachi

    Journal of Experimental Botany   2025.4

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    Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    Under field conditions, solar radiation on a crop canopy fluctuates according to clouds, wind, and self-shading. The slower response of photosynthesis compared with the rate of irradiation changes leads to loss of photosynthetic carbon gain. Although some genetic differences in the rate of photosynthetic induction have been reported, the diversity among rice varieties is largely unknown. Here we evaluated genetic variation in the response of photosynthesis to a step increase in light intensity among 166 temperate japonica varieties including landraces and modern varieties. Large genetic variation in photosynthetic induction and less evidence of improvement across modern breeding programmes were acknowledged. In the correlation analysis between physiological traits for all varieties, the efficiency of non-stomatal processes was the major factor affecting the rate of induction. The landrace Aikokumochi, which has intermediate photosynthetic capacity, showed rapid photosynthetic induction—eight times that of the slowest variety. This was attributed to smaller non-stomatal limitation in the initial phase of induction and smaller stomatal limitation in the later phase than in reference varieties. Aikokumochi also had a greater photosynthetic CO2 gain without reduced water use efficiency under repeated fluctuating light. These findings demonstrate the importance of genetic resources to improve photosynthesis while maintaining water use efficiency under fluctuating light conditions.

    DOI： 10.1093/jxb/eraf083

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  • <scp>C4</scp> monocots and <scp>C4</scp> dicots exhibit rapid photosynthetic induction response in contrast to <scp>C3</scp> plants Reviewed

    Keiichiro Tanigawa, Qu Yuchen, Naoya Katsuhama, Kazuma Sakoda, Yu Wakabayashi, Yu Tanaka, Rowan Sage, Tracy Lawson, Wataru Yamori

    Physiologia Plantarum   176 ( 4 )   2024.7

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    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    Considering the prevalence of ever‐changing conditions in the natural world, investigation of photosynthetic responses in C4 plants under fluctuating light is needed. Here, we studied the effect of dynamic illumination on photosynthesis in totally 10 C3, C3–C4 intermediate, C4‐like and C4 dicots and monocots at CO2 concentrations of 400 and 800 μmol mol−1. C4 and C4‐like plants had faster photosynthetic induction and light‐induced stomatal dynamics than C3 plants at 400 μmol mol−1, but not at 800 μmol mol−1 CO2, at which the CO2 supply rarely limits photosynthesis. C4 and C4‐like plants had a higher water use efficiency than C3 plants at both CO2 concentrations. There were positive correlations between photosynthetic induction and light‐induced stomatal response, together with CO2 compensation point, which was a parameter of the CO2‐concentrating mechanism of C4 photosynthesis. These results clearly show that C4 photosynthesis in both monocots and dicots adapts to fluctuating light conditions more efficiently than C3 photosynthesis. The rapid photosynthetic induction response in C4 plants can be attributed to the rapid stomatal dynamics, the CO2‐concentrating mechanism or both.

    DOI： 10.1111/ppl.14431

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  • Analysis on the physiological mechanism of QTL: qRaise1 that affecting photosynthetic induction response in rice leaves

    Yorioka Hidenobu, Taniyoshi Kazuki, Adachi Shunsuke, Yamauchi Takaki, Tanaka Yu, Shiraiwa Tatsuhiko

    Abstracts of Meeting of the CSSJ   257   15 - 15   2024.3

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    Language：Japanese   Publisher：CROP SCIENCE SOCIETY OF JAPAN  

    DOI： 10.14829/jcsproc.257.0_15

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  • Uncovering physiological factors of the rapid photosynthetic induction in a rice variety ‘Aikokumochi’ by altering light intensity and dark-acclimation time before the induction

    Kawaguchi Yoshiki, Honda Sotaro, Taniyoshi Kazuki, Ookawa Taiichiro, Tanaka Yu, Adachi Shunsuke

    Abstracts of Meeting of the CSSJ   257   18 - 18   2024.3

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    Language：Japanese   Publisher：CROP SCIENCE SOCIETY OF JAPAN  

    DOI： 10.14829/jcsproc.257.0_18

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  • QTL analysis for photosynthetic induction using recombinant inbred lines from a cross between rice varieties ‘Aikokumochi’ and ‘Nipponbare’

    Kawaguchi Yoshiki, Honda Sotaro, Taniguchi Ryouta, Taniyoshi Kazuki, Chigira Koki, Ookawa Taiichiro, Tanaka Yu, Adachi Shunsuke

    Kanto Journal of Crop Science   39   44 - 45   2024

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    Language：Japanese   Publisher：Crop Science Society of Japan Kanto Branch  

    DOI： 10.20768/jcskantod.39.0_44

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  • Genome-wide association study of leaf photosynthesis using a high-throughput gas exchange system in rice Reviewed

    Sotaro Honda, Ayumu Imamura, Yoshiaki Seki, Koki Chigira, Marina Iwasa, Kentaro Hayami, Tomohiro Nomura, Satoshi Ohkubo, Taiichiro Ookawa, Atsushi J. Nagano, Makoto Matsuoka, Yu Tanaka, Shunsuke Adachi

    Photosynthesis Research   159 ( 1 )   17 - 28   2023.12

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1007/s11120-023-01065-3

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    Other Link： https://link.springer.com/article/10.1007/s11120-023-01065-3/fulltext.html

  • Development of a Simple and Rapid Measurement System for Determining CO2 Assimilation Rate in Plant Leaves

    HONDA Sotaro, OHKUBO Satoshi, ARAIE Toshitake, AKIYAMA Shigeyuki, AOKI Naofumi, TANAKA Yu, ADACHI Shunsuke

    Japanese Journal of Crop Science   92 ( 4 )   289 - 299   2023.10

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    Language：Japanese   Publisher：CROP SCIENCE SOCIETY OF JAPAN  

    Field measurement of CO2 assimilation rate in plant leaves is done by clumping the leaf with a chamber and waiting a few minutes for each measurement using special carry on equipment. This costly and labor-intensive method has hindered the acquisition of large-scale data on photosynthesis of field grown plants. We created MIC-100, a new closed-type photosynthesis measurement device with a novel infrared gas analyzer cell that enables high-throughput measurement of leaf CO2 assimilation rate. The measurement time required for a single leaf using MIC-100 was reduced to one-seventh that of conventional open system devices, while similar values were obtained for the same leaf under high-light conditions. We also created two supporting technologies to obtain rapid photosynthesis measurements for field-grown rice: the upper-limb assist suit and the leaf area measurement system with a commercial document scanner. These systems enabled large-scale surveys of the natural genetic variation and ontogenetic changes among diverse sets of rice accessions. MIC-100 and the related systems will be useful for physiological studies with many other plant species and for growth surveys in the agricultural fields.

    DOI： 10.1626/jcs.92.289

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    Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I033254766

  • Deep learning enables instant and versatile estimation of rice yield using ground-based RGB images Reviewed International journal

    Yu Tanaka, Tomoya Watanabe, Keisuke Katsura, Yasuhiro Tsujimoto, Toshiyuki Takai, Takashi Sonam Tashi Tanaka, Kensuke Kawamura, Hiroki Saito, Koki Homma, Salifou Goube Mairoua, Kokou Ahouanton, Ali Ibrahim, Kalimuthu Senthilkumar, Vimal Kumar Semwal, Edurado Graterol Matute, Edgar Corredor, Raafat El-Namaky, Norbie L. Manigbas, Edurado Jimmy P. Quilang, Yu Iwahashi, Kota Nakajima, Eisuke Takeuchi, Kazuki Saito

    Plant Phenomics   2023.6

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

    DOI： 10.34133/plantphenomics.0073

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  • Dry matter production and photosynthetic properties of a high-yielding rice cultivar Hokuriku193

    Kondo Toshiki, Ikeda Yuma, Okawa Taiichiro, Tanaka Yu, Adachi Shunsuke

    Abstracts of Meeting of the CSSJ   255   132 - 132   2023.3

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    Language：Japanese   Publisher：CROP SCIENCE SOCIETY OF JAPAN  

    DOI： 10.14829/jcsproc.255.0_132

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  • Biomass estimation of World rice (Oryza sativa L.) core collection based on the convolutional neural network and digital images of canopy Reviewed

    Kota Nakajima, Yu Tanaka, Keisuke Katsura, Tomoaki Yamaguchi, Tomoya Watanabe, Tatsuhiko Shiraiwa

    Plant Production Science   26 ( 2 )   187 - 196   2023

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)  

    DOI： 10.1080/1343943X.2023.2210767

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  • Varietal difference of photosynthetic induction under different background irradiance in rice

    Kawaguchi Yoshiki, Honda Sotaro, Taniyoshi Kazuki, Ookawa Taiichiro, Tanaka Yu, Adachi Shunsuke

    Kanto Journal of Crop Science   38   56 - 57   2023

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    Language：Japanese   Publisher：Crop Science Society of Japan Kanto Branch  

    DOI： 10.20768/jcskantod.38.0_56

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  • Anisohydric characteristics of a rice genotype 'ARC 11094' contribute to increased photosynthetic carbon fixation in response to high light. Reviewed International journal

    Kazuki Taniyoshi, Yu Tanaka, Shunsuke Adachi, Tatsuhiko Shiraiwa

    Physiologia plantarum   174 ( 6 )   e13825   2022.11

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    Photosynthetic induction, which is the response of the CO2 assimilation rate to a stepwise increase in light intensity, potentially affects plant carbon gain and crop productivity in field environments. Although natural variations in photosynthetic induction are determined by CO2 supply and its fixation, detailed factors, especially CO2 supply, are unclear. This study investigated photosynthesis at steady and non-steady states in three rice (Oryza sativa L.) genotypes: ARC 11094, Takanari and Koshihikari. Stomatal traits and water relations in the plants were evaluated to characterise CO2 supply. Photosynthetic induction in ARC 11094 and Takanari was superior to that in Koshihikari owing to an efficient CO2 supply. The CO2 supply in Takanari is attributed to its high stomatal density, small guard cell length and extensive root mass, whereas that in ARC 11094 is attributed to its high stomatal conductance per stoma and stomatal opening in leaves with insufficient water (i.e., anisohydric stomatal behaviour). Our results suggest that there are various mechanisms for realising an efficient CO2 supply during the induction response. These characteristics can be useful for improving photosynthetic induction and, thus, crop productivity in field environments in future breeding programmes.

    DOI： 10.1111/ppl.13825

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  • Predicting rice (Oryza sativa L.) canopy temperature difference and estimating its environmental response in two rice cultivars, ‘Koshihikari’ and ‘Takanari’, based on a neural network Reviewed

    Rintaro Kondo, Yu Tanaka, Tatsuhiko Shiraiwa

    Plant Production Science   1 - 13   2022.7

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Informa UK Limited  

    DOI： 10.1080/1343943x.2022.2103003

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  • Analysis of Physiological Variations and Genetic Architecture for Photosynthetic Capacity of Japanese Soybean Germplasm

    Mohammad Jan Shamim, Akito Kaga, Yu Tanaka, Hiroshi Yamatani, Tatsuhiko Shiraiwa

    Frontiers in Plant Science   13   2022.6

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Frontiers Media SA  

    The culmination of conventional yield improving parameters has widened the margin between food demand and crop yield, leaving the potential yield productivity to be bridged by the manipulation of photosynthetic processes in plants. Efficient strategies to assess photosynthetic capacity in crops need to be developed to identify suitable targets that have the potential to improve photosynthetic efficiencies. Here, we assessed the photosynthetic capacity of the Japanese soybean mini core collection (GmJMC) using a newly developed high-throughput photosynthesis measurement system “MIC-100” to analyze physiological mechanisms and genetic architecture underpinning photosynthesis. K-means clustering of light-saturated photosynthesis (Asat) classified GmJMC accessions into four distinct clusters with Cluster2 comprised of highly photosynthesizing accessions. Genome-wide association analysis based on the variation of Asat revealed a significant association with a single nucleotide polymorphism (SNP) on chromosome 17. Among the candidate genes related to photosynthesis in the genomic region, variation in expression of a gene encoding G protein alpha subunit 1 (GPA1) showed a strong correlation (r = 0.72, p &amp;lt; 0.01) with that of Asat. Among GmJMC accessions, GmJMC47 was characterized by the highest Asat, stomatal conductance (gs), stomatal density (SDensity), electron transfer rate (ETR), and light use efficiency of photosystem II (Fv’/Fm′) and the lowest non-photochemical quenching [NPQ(t)], indicating that GmJMC47 has greater CO2 supply and efficient light-harvesting systems. These results provide strong evidence that exploration of plant germplasm is a useful strategy to unlock the potential of resource use efficiencies for photosynthesis.

    DOI： 10.3389/fpls.2022.910527

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  • Towards improved dynamic photosynthesis in C3 crops by utilizing natural genetic variation

    Kazuma Sakoda, Shunsuke Adachi, Wataru Yamori, Yu Tanaka

    Journal of Experimental Botany   73 ( 10 )   3109 - 3121   2022.5

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    Authorship：Last author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

    Abstract

    Under field environments, fluctuating light conditions induce dynamic photosynthesis, which affects carbon gain by crop plants. Elucidating the natural genetic variations among untapped germplasm resources and their underlying mechanisms can provide an effective strategy to improve dynamic photosynthesis and, ultimately, improve crop yields through molecular breeding approaches. In this review, we first overview two processes affecting dynamic photosynthesis, namely (i) biochemical processes associated with CO2 fixation and photoprotection and (ii) gas diffusion processes from the atmosphere to the chloroplast stroma. Next, we review the intra- and interspecific variations in dynamic photosynthesis in relation to each of these two processes. It is suggested that plant adaptations to different hydrological environments underlie natural genetic variation explained by gas diffusion through stomata. This emphasizes the importance of the coordination of photosynthetic and stomatal dynamics to optimize the balance between carbon gain and water use efficiency under field environments. Finally, we discuss future challenges in improving dynamic photosynthesis by utilizing natural genetic variation. The forward genetic approach supported by high-throughput phenotyping should be introduced to evaluate the effects of genetic and environmental factors and their interactions on the natural variation in dynamic photosynthesis.

    DOI： 10.1093/jxb/erac100

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    Other Link： https://academic.oup.com/jxb/article-pdf/73/10/3109/43802194/erac100.pdf

  • Drought stress reduces crop carbon gain due to delayed photosynthetic induction under fluctuating light conditions

    Kazuma Sakoda, Kazuki Taniyoshi, Wataru Yamori, Yu Tanaka

    Physiologia Plantarum   174 ( 1 )   2022.1

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    Authorship：Last author   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    DOI： 10.1111/ppl.13603

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    Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ppl.13603

  • MIC-100, a new system for high-throughput phenotyping of instantaneous leaf photosynthetic rate in the field. International journal

    Yu Tanaka, Kazuki Taniyoshi, Ayumu Imamura, Ryo Mukai, Shun Sukemura, Kazuma Sakoda, Shunsuke Adachi

    Functional plant biology : FPB   2021.6

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    Photosynthesis occurs mainly in plant leaves and is a fundamental process in the global carbon cycle and in crop production. The exploitation of natural genetic variation in leaf photosynthetic capacity is a promising strategy to meet the increasing demand for crops. The present study reports the newly developed photosynthesis measurement system 'MIC-100,' with a higher throughput for measuring instantaneous photosynthetic rate in the field. MIC-100 is established based on the closed system and directly detects the CO2 absorption in the leaf chamber. The reproducibility, accuracy, and measurement throughput of MIC-100 were tested using soybean (Glycine max L. (Merr.)) and rice (Oryza sativa L.) grown under field conditions. In most cases, the coefficient of variance (CV) for repeated-measurements of the same leaf was less than 0.1. The photosynthetic rates measured with the MIC-100 model showed a significant correlation (R2 = 0.93-0.95) with rates measured by a widely used gas-exchange system. The measurement throughput of the MIC-100 is significantly greater than that of conventional open gas-exchange systems under field conditions. Although MIC-100 solely detects the instantaneous photosynthetic rate under a given environment, this study demonstrated that the MIC-100 enables the rough evaluation of leaf photosynthesis within the large-scale plant populations grown in the field.

    DOI： 10.1071/FP21029

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  • Continuous estimation of rice (Oryza sativa (L.)) canopy transpiration realized by modifying the heat balance model Reviewed

    Rintaro Kondo, Yu Tanaka, Hiroto Katayama, Koki Homma, Tatsuhiko Shiraiwa

    Biosystems Engineering   204   294 - 303   2021.4

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.biosystemseng.2021.01.016

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  • Drought stress imposes reversible photosynthetic damage under fluctuating light conditions in crops

    Kazuma Sakoda, Kazuki Taniyoshi, Wataru Yamori, Yu Tanaka

    2021.2

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    Authorship：Last author   Publisher：Authorea, Inc.  

    <p id="p1">Drought stress is a major limiting factor for crop growth and yield.
    Water availability in the field can cyclically change between drought
    and rewatering conditions, depending on precipitation patterns.
    Concurrently, light intensity under field conditions can fluctuate,
    inducing dynamic photosynthesis and transpiration during crop growth
    period. The present study aimed to characterize carbon gain and water
    use in fluctuating light under drought and rewatering conditions by
    conducting gas exchange measurements in two major crops, namely rice and
    soybean. In both crops, drought stress reduced steady-state
    photosynthesis and/or photosynthetic capacity, and delayed
    photosynthetic induction even when it had relatively small impact on
    photosynthetic capacity, suggesting that the drought effects on
    photosynthesis should be evaluated based on induction, maximum, and
    steady states. This delayed photosynthetic induction resulted in a
    substantial loss of carbon gain under fluctuating light conditions,
    which can be a limiting factor for crop growth and yield in the field.
    Meanwhile, rewatering after drought conditions completely recovered
    photosynthetic capacity and induction in both crops, whereas drought
    experience would be memorized to slow down the stomatal opening.
    Therefore, the stability of photosynthetic induction can be a promising
    target to improve drought tolerance during crop breeding in the future.

    DOI： 10.22541/au.161281464.49728392/v1

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  • Physiological analysis of leaf photosynthesis of backcross-derived progenies from soybean (Glycine max (L.) Merrill) and G. tomentella Hayata Reviewed

    Mohammad Jan Shamim, Yu Tanaka, Kazuma Sakoda, Tatsuhiko Shiraiwa, Randall L. Nelson

    Plant Production Science   24 ( 1 )   109 - 117   2021.1

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1080/1343943x.2020.1807369

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  • Higher Stomatal Density Improves Photosynthetic Induction and Biomass Production in Arabidopsis Under Fluctuating Light Reviewed International journal

    Kazuma Sakoda, Wataru Yamori, Tomoo Shimada, Shigeo S. Sugano, Ikuko Hara-Nishimura, Yu Tanaka

    Frontiers in Plant Science   11   589603 - 589603   2020.10

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    Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Frontiers Media SA  

    Stomatal density (SD) is closely associated with photosynthetic and growth characteristics in plants. In the field, light intensity can fluctuate drastically within a day. The objective of the present study is to examine how higher SD affects stomatal conductance (g
    s
    ) and CO2 assimilation rate (A) dynamics, biomass production and water use under fluctuating light. Here, we compared the photosynthetic and growth characteristics under constant and fluctuating light among three lines of Arabidopsis thaliana (L.): the wild type (WT), STOMAGEN/EPFL9-overexpressing line (ST-OX), and EPIDERMAL PATTERNING FACTOR 1 knockout line (epf1). ST-OX and epf1 showed 268.1 and 46.5% higher SD than WT (p < 0.05). Guard cell length of ST-OX was 10.0% lower than that of WT (p < 0.01). There were no significant variations in gas exchange parameters at steady state between WT and ST-OX or epf1, although these parameters tended to be higher in ST-OX and epf1 than WT. On the other hand, ST-OX and epf1 showed faster A induction than WT after step increase in light owing to the higher g
    s
    under initial dark condition. In addition, ST-OX and epf1 showed initially faster g
    s
    induction and, at the later phase, slower g
    s
    induction. Cumulative CO2 assimilation in ST-OX and epf1 was 57.6 and 78.8% higher than WT attributable to faster A induction with reduction of water use efficiency (WUE). epf1 yielded 25.6% higher biomass than WT under fluctuating light (p < 0.01). In the present study, higher SD resulted in faster photosynthetic induction owing to the higher initial g
    s
    . epf1, with a moderate increase in SD, achieved greater biomass production than WT under fluctuating light. These results suggest that higher SD can be beneficial to improve biomass production in plants under fluctuating light conditions.

    DOI： 10.3389/fpls.2020.589603

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  • Genetic variation in the photosynthetic induction response in rice (Oryza sativa L.) Reviewed

    Kazuki Taniyoshi, Yu Tanaka, Tatsuhiko Shiraiwa

    Plant Production Science   23 ( 4 )   513 - 521   2020.10

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Informa UK Limited  

    DOI： 10.1080/1343943x.2020.1777878

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  • Rice Cultivar Takanari Has Higher Photosynthetic Performance Under Fluctuating Light Than Koshihikari, Especially Under Limited Nitrogen Supply and Elevated CO2 Reviewed

    Satoshi Ohkubo, Yu Tanaka, Wataru Yamori, Shunsuke Adachi

    Frontiers in Plant Science   11   2020.9

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

    DOI： 10.3389/fpls.2020.01308

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  • Leaf and Canopy Transpiration of Rice Heading Gene hd3a Mutant Reviewed

    Yu Iwahashi, Yu Tanaka, Koki Homma, Hiroki Saito, Yutaka Okumoto, Tatsuhiko Shiraiwa

    Japanese Journal of Crop Science   89 ( 3 )   218 - 223   2020.7

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    Authorship：Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：Crop Science Society of Japan  

    DOI： 10.1626/jcs.89.218

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  • Two novel quantitative trait loci affecting the variation in leaf photosynthetic capacity among soybeans. Reviewed International journal

    Kazuma Sakoda, Akito Kaga, Yu Tanaka, Seita Suzuki, Kenichiro Fujii, Masao Ishimoto, Tatsuhiko Shiraiwa

    Plant science : an international journal of experimental plant biology   291   110300 - 110300   2020.2

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    There is a large variation in CO2 assimilation rate per unit of leaf area (A) within or among crop species, which can be exploited to improve A by elucidating the mechanisms underlying such variation. The objective of the present study is to elucidate the genetic factors affecting the variation in leaf photosynthetic capacity among soybeans. Here, we conducted field experiments over three years, using Enrei, a leading variety in Japan, Peking, a landrace from China and the chromosome segment substitution lines derived from their progenies. The gas exchange measurements were conducted to evaluate A among soybean. Peking showed higher A than Enrei after the flowering in all the years. The genetic analysis identified two novel quantitative trait loci (QTLs) related to variation in A, which were located on chromosome 13 (qLPC13) and 20 (qLPC20). The Peking allele at qLPC13 increased A by 8.3 % in the Enrei genetic background, while the Peking allele at qLPC20 decreased A by 15.3 %. The present study is the first report on QTLs affecting a genotypic variation in leaf photosynthetic capacity among field-grown soybeans. The identification of the causal genes in these QTLs can provide a novel strategy to enhance leaf photosynthetic capacity with soybean breeding.

    DOI： 10.1016/j.plantsci.2019.110300

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  • High-yielding rice Takanari has superior photosynthetic response to a commercial rice Koshihikari under fluctuating light Reviewed

    Shunsuke Adachi, Yu Tanaka, Atsuko Miyagi, Makoto Kashima, Ayumi Tezuka, Yoshihiro Toya, Shunzo Kobayashi, Satoshi Ohkubo, Hiroshi Shimizu, Maki Kawai-Yamada, Rowan F Sage, Atsushi J Nagano, Wataru Yamori

    Journal of Experimental Botany   70 ( 19 )   5287 - 5297   2019.10

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

    DOI： 10.1093/jxb/erz304

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    Other Link： http://academic.oup.com/jxb/article-pdf/70/19/5287/30152701/erz304.pdf

  • Natural genetic variation of the photosynthetic induction response to fluctuating light environment. Reviewed

    Tanaka Y, Adachi S, Yamori W

    Current opinion in plant biology   49   52 - 59   2019.6

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    DOI： 10.1016/j.pbi.2019.04.010

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  • Consortia of anti-nematode fungi and bacteria in the rhizosphere of soybean plants attacked by root-knot nematodes Reviewed

    Hirokazu Toju, Yu Tanaka

    Royal Society Open Science   6 ( 3 )   2019.5

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  • Genetic Diversity in Stomatal Density among Soybeans Elucidated Using High-throughput Technique Based on an Algorithm for Object Detection Reviewed International journal

    Kazuma Sakoda, Tomoya Watanabe, Shun Sukemura, Shunzo KobayashiYuichi Nagasaki, Yu Tanaka, Tatsuhiko Shiraiwa

    Scientific Reports   9 ( 1 )   7610 - 7610   2019.5

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    The stomatal density (SD) can be a promising target to improve the leaf photosynthesis in soybeans (Glycine max (L.) Merr). In a conventional SD evaluation, the counting process of the stomata during a manual operation can be time-consuming. We aimed to develop a high-throughput technique for evaluating the SD and elucidating the variation in the SD among various soybean accessions. The central leaflet of the first trifoliolate was sampled, and microscopic images of the leaflet replica were obtained among 90 soybean accessions. The Single Shot MultiBox Detector, an algorithm for an object detection based on deep learning, was introduced to develop an automatic detector of the stomata in the image. The developed detector successfully recognized the stomata in the microscopic image with high-throughput. Using this technique, the value of R2 reached 0.90 when the manually and automatically measured SDs were compared in the 150 images. This technique discovered a variation in SD from 93 ± 3 to 166 ± 4 mm-2 among the 90 accessions. Our detector can be a powerful tool for a SD evaluation with a large-scale population in crop species, accelerating the identification of useful alleles related to the SD in future breeding programs.

    DOI： 10.1038/s41598-019-44127-0

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  • Activation State of Rubisco Decreases with the Nitrogen accumulation during the Reproductive Stage in Soybean [Glycine max (L.) Merr.] Reviewed

    Kazuma Sakoda, Seita Suzuki, FUKAYAMA HIROSHI, Yu Tanaka, Tatsuhiko Shiraiwa

    Photosynthetica   2018

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

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  • Identification of large variation in the photosynthetic induction response among 37 soybean [Glycine max (L.) Merr.] genotypes that is not correlated with steady-state photosynthetic capacity Reviewed

    M. A. Soleh, Y. Tanaka, S. Y. Kim, S. C. Huber, K. Sakoda, T. Shiraiwa

    PHOTOSYNTHESIS RESEARCH   131 ( 3 )   305 - 315   2017.3

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/s11120-016-0323-1

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  • Genetic and Physiological Diversity in the Leaf Photosynthetic Capacity of Soybean Reviewed

    Kazuma Sakoda, Yu Tanaka, Stephen P. Long, Tatsuhiko Shiraiwa

    CROP SCIENCE   56 ( 5 )   2731 - 2741   2016.9

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.2135/cropsci2016.02.0122

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  • Factors underlying genotypic differences in the induction of photosynthesis in soybean [Glycine max (L.) Merr.] Reviewed

    Mochamad Arief Soleh, Yu Tanaka, Yuko Nomoto, Yu Iwahashi, Keiichiro Nakashima, Yasuko Fukuda, Stephen P. Long, Tatsuhiko Shiraiwa

    PLANT CELL AND ENVIRONMENT   39 ( 3 )   685 - 693   2016.3

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    DOI： 10.1111/pce.12674

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  • Yield and dry matter productivity of Japanese and US soybean cultivars Reviewed

    Kawasaki, Y, Y. Tanaka, K. Katsura, L. C. Purcell, T. Shiraiwa

    Plant Prod. Sci.   19   257–266 - 266   2016.2

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    DOI： 10.1080/1343943X.2015.1133235

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  • Response of the leaf photosynthetic rate to available nitrogen in erect panicle-type rice (Oryza sativa L.) cultivar, Shennong265 Reviewed

    Chihiro Urairi, Yu Tanaka, Yoshihiro Hirooka, Koki Homma, Zhengjin Xu, Tatsuhiko Shiraiwa

    PLANT PRODUCTION SCIENCE   19 ( 3 )   420 - 426   2016

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    DOI： 10.1080/1343943X.2016.1149037

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  • Measurements and its Applications of Leaf Gas Exchange Reviewed

    Yu Tanaka

    Japanese journal of crop science   85 ( 3 )   339 - 346   2016

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    DOI： 10.1626/jcs.85.339

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  • Stability Verification of the Effects of Stem Determination and Earliness of Flowering on Green Stem Disorder of Soybean against Genetic Background and Environment Reviewed

    Fujii Kenichiro, Kato Shin, Sayama Takashi, Tanaka Yu, Nakazaki Tetsuya, Ishimoto Masao, Shiraiwa Tatsuhiko

    PLANT PRODUCTION SCIENCE   18 ( 2 )   166 - 179   2015.4

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    DOI： 10.1626/pps.18.166

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  • Biomass production and yield of soybean grown under converted paddy fields with excess water during the early growth stage Reviewed

    Bajgain, R, Kawasaki, Y, Akamatsu, Y, Tanaka, Y, Kawamura, H, Katsura, K, Shiraiwa, T

    Field Crops Research   180   221 - 227   2015

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    DOI： 10.1016/j.fcr.2015.06.010

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  • A major and stable QTL associated with seed weight in soybean across multiple environments and genetic backgrounds Reviewed

    Shin Kato, Takashi Sayama, Kenichiro Fujii, Setsuzo Yumoto, Yuhi Kono, Tae-Young Hwang, Akio Kikuchi, Yoshitake Takada, Yu Tanaka, Tatsuhiko Shiraiwa, Masao Ishimoto

    THEORETICAL AND APPLIED GENETICS   127 ( 6 )   1365 - 1374   2014.6

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    DOI： 10.1007/s00122-014-2304-0

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  • Leaf Photosynthesis and Its Genetic Improvement from the Perspective of Energy Flow and CO2 Diffusion Reviewed

    Yu Tanaka, Etsushi Kumagai, Youshi Tazoe, Shunsuke Adachi, Koki Homma

    PLANT PRODUCTION SCIENCE   17 ( 2 )   111 - 123   2014.4

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    DOI： 10.1626/pps.17.111

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  • Enhancement of leaf photosynthetic capacity through increased stomatal density in Arabidopsis Reviewed

    Yu Tanaka, Shigeo S. Sugano, Tomoo Shimada, Ikuko Hara-Nishimura

    NEW PHYTOLOGIST   198 ( 3 )   757 - 764   2013.5

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    DOI： 10.1111/nph.12186

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  • ダイズ単収の日米地域差の拡大要因に関する作物学的調査‐視察報告(第2回)米国における圃場・作物管理‐ Reviewed

    白岩立彦, 桂圭祐, 島田信二, 川崎洋平, 村田資治, 本間香貴, 義平大樹, 田中朋之, 田中佑

    作物研究(作物学会近畿支部会報)   56   93 - 98   2011

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  • Variability of Leaf Morphology and Stomatal Conductance in Soybean [Glycine max (L.) Merr.] Cultivars Reviewed

    Y. Tanaka, K. Fujii, T. Shiraiwa

    CROP SCIENCE   50 ( 6 )   2525 - 2532   2010.11

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    DOI： 10.2135/cropsci2010.02.0058

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  • Stem growth habit affects leaf morphology and gas exchange traits in soybean Reviewed

    Yu Tanaka, Tatsuhiko Shiraiwa

    ANNALS OF BOTANY   104 ( 7 )   1293 - 1299   2009.12

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    DOI： 10.1093/aob/mcp240

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  • Leaf gas exchange activity in soybean as related to leaf traits and stem growth habit Reviewed

    Y. Tanaka, T. Shiraiwa, A. Nakajima, J. Sato, T. Nakazaki

    CROP SCIENCE   48 ( 5 )   1925 - 1932   2008.9

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    DOI： 10.2135/cropsci2007.12.0707

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Books

  • 植物の超階層生物学: ゲノミクス×フェノミクス×生態学でひもとく多様性 (種生物学研究 43号)

    種生物学会（ Role： Joint author ,  第8章）

    文一総合出版  2023.8  （ ISBN:4829962100 ）

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    Total pages：344   Language：Japanese

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  • Handbook of plant and crop physiology

    Pessarakli, Mohammad（pp. 1026-1040）

    CRC Press  2021  （ ISBN:9780367554545 ）

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    Total pages：xxv, 1173 p.   Language：English

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MISC

  • Construction of Deep Learning-Based Estimation Model for the Days Before Heading of Rice Using Image Analysis

    田村拓巳, 中嶌洸太, 田中佑, 白岩立彦

    日本作物学会講演会要旨集   257th   2024

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  • Effect of labor-saving addition of training data by pseudo-labeling on the versatility of deep learning-based estimation model for rice biomass

    Nakajima Kota, Tanaka Yu, Katsura Keisuke, Yamaguchi Tomoaki, Saito Kazuki, Tsujimoto Yasuhiro, Watanabe Tomoya, Mochizuki Atsushi, Shiraiwa Tatsuhiko

    Abstracts of Meeting of the CSSJ   256   50 - 50   2023.9

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    DOI： 10.14829/jcsproc.256.0_50

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  • Time-course genome wide association study for the photosynthetic induction in rice

    谷吉和貴, 中嶌洸太, 西村和紗, 田中佑, 白岩立彦

    日本作物学会講演会要旨集   256th   2023

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  • Trial Use of Smartphone Applications for Yield Investigation in Farmer Fields in the Coastal Region of Sendai, Japan:

    SUZUKI Haruka, ISHIBASHI Taro, ITO Ruito, YAMAMOTO Shuhei, TANAKA Yu, WATANABE Tomoya, SAITO Kazuki, TSUJIMOTO Yasuhiro, TAKAI Toshiyuki, HOMMA Koki

    Tohoku Journal of Crop Science   65   21 - 22   2022.12

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    DOI： 10.20725/tjcs.65.0_21

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  • Three-year experiments of genome-wide association study for leaf photosynthetic rate using japonica rice panel

    Imamura Ayumu, Honda Sotaro, Seki Yoshiaki, Ookawa Taiichiro, Matsuoka Makoto, Tanaka Yu, Adachi Shunsuke

    Abstracts of Meeting of the CSSJ   254   113 - 113   2022.9

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    DOI： 10.14829/jcsproc.254.0_113

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  • Construction of deep learning-based estimation model for rice biomass and its robustness to shooting time and lack of hills

    Nakajima Kota, Tanaka Yu, Katsura Keisuke, Yamaguchi Tomoaki, Saito Kazuki, Tsujimoto Yasuhiro, Watanabe Tomoya, Shiraiwa Tatsuhiko

    Abstracts of Meeting of the CSSJ   254   117 - 117   2022.9

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    DOI： 10.14829/jcsproc.254.0_117

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  • Variation and characterization of photosynthetic induction among Japanese rice cultivars

    Taniyoshi Kazuki, Seki Yoshiaki, Hiramatsu Shoma, Tamaki Rikuo, Asagi Naomi, Matsuoka Makoto, Tanaka Yu, Adachi Shunsuke

    Abstracts of Meeting of the CSSJ   253   74 - 74   2022.3

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    DOI： 10.14829/jcsproc.253.0_74

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  • Characterization of photosynthetic induction properties among Japanese rice cultivars

    Taniyoshi Kazuki, Miyamoto Airi, Asagi Naomi, Matsuoka Makoto, Tanaka Yu, Adachi Shunsuke

    Abstracts of Meeting of the CSSJ   253   75 - 75   2022.3

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    DOI： 10.14829/jcsproc.253.0_75

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  • ニューラルネットワークに基づくイネ群落葉気温差の予測とその環境応答の評価

    近藤 琳太郎, 田中 佑, 白岩 立彦

    第253回日本作物学会講演会要旨集   56   2022.3

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    DOI： 10.14829/jcsproc.253.0_56

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  • Estimation of rice biomass using deep learning-based model for cultivars having diverse plant types

    中嶌洸太, 田中佑, 桂圭佑, 山口友亮, 白岩立彦

    日本作物学会講演会要旨集   251st   2021

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  • Photosynthetic measurement by two type of solar-induced fluorescence

    栗山健二, 久世宏明, WANG Quan, 村松加奈子, 本間香貴, 田中佑, 白岩立彦

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)   82nd   2021

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  • Deep learning-based robust estimation for rice biomass using digital image of canopy

    中嶌洸太, 田中佑, 田中佑, 桂圭佑, 白岩立彦

    日本作物学会講演会要旨集   249th   2020

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  • Genome-wide association study for leaf photosynthetic rate in rice with a high-throughput gas exchange measurement

    Seki Yoshiaki, Hayami Kentaro, Nomura Tomohiro, Ookawa Taiichiro, Matsuoka Makoto, Tanaka Yu, Adachi Shunsuke

    Kanto Journal of Crop Science   35   30 - 31   2020

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    DOI： 10.20768/jcskanto.35.0_30

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  • Genome-wide association study for leaf photosynthetic rate in rice with a high-throughput gas exchange measurement

    関佳彬, 速水健太郎, 野村知宏, 大川泰一郎, 松岡信, 田中佑, 安達俊輔

    日本作物学会関東支部会報(Web)   35   2020

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  • 断続撮影された少数の熱画像からイネ群落蒸散速度を連続推定するシステムの開発

    近藤 琳太郎, 田中 佑, 白岩 立彦

    159   2019.9

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    DOI： 10.14829/jcsproc.248.0_159

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  • 光合成誘導反応のイネ品種間差に関わる生理的要因の解析

    安達俊輔, 田中佑, 宮城敦子, 鹿島誠, 手塚あゆみ, 戸谷吉博, 小林俊造, 大久保智司, 清水浩, 川合真紀, 永野惇, 矢守航

    日本作物学会講演会要旨集   247th   65   2019.3

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    DOI： 10.14829/jcsproc.247.0_65

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  • 世界のダイズコアコレクションの個葉における光合成速度と反射スペクトルの変異の探索

    向井諒, 田中佑, 田中佑, 迫田和馬, 助村駿, 白岩立彦

    日本作物学会講演会要旨集   247th   2019

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  • 新型迅速光合成測定装置を用いたイネ光合成日変化の評価

    寺崎千鶴, 富澤和紀, 速水健太郎, 大川泰一郎, 大久保智司, 田中佑, 安達俊輔

    日本作物学会講演会要旨集   246th   129   2018.9

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  • イネ群落蒸散の継続的推定およびそれに基づく物質生産の評価

    近藤 琳太郎, 田中 佑, 本間 香貴, 白岩 立彦

    第245回日本作物学会講演会要旨集   86   2018.3

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    DOI： 10.14829/jcsproc.245.0_104

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  • Evaluation of Soybean Yield Using Non-destructive Measurement and Convolutional Neural Network

    Watanabe Tomoya, Kousaka Fumiko, Suzuki Chika, Kobayashi Satoshi, Yamaguchi Naoya, Tanaka Yu, Shiraiwa Tatsuhiko

    Abstracts of Meeting of the CSSJ   245 ( 0 )   2018

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  • 深層学習に基づく迅速評価手法を用いたダイズ個葉の気孔密度に関する遺伝的変異の解明

    迫田和馬, 渡邊智也, 助村駿, 小林俊造, 長崎裕一, 白岩立彦, 田中佑, 田中佑

    日本作物学会講演会要旨集   245th   2018

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  • 新たな測定原理に基づく携帯型光合成測定装置の開発

    田中佑, 田中佑, 青木直史, 秋山重之, 池田俊明, 水野富美雄, 小林章, 安達俊輔, 安達俊輔, 内山正克

    日本作物学会講演会要旨集   243rd   9   2017.3

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  • イネ群落コンダクタンスの継続的推定およびそれに基づく物質生産性の評価

    近藤 琳太郎, 片山 寛斗, 田中 佑, 本間 香貴, 白岩 立彦

    第243回日本作物学会講演会要旨集   116   2017.3

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    DOI： 10.14829/jcsproc.243.0_116

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  • ダイズにおける個葉光合成能力の系統間差についての水分生理的解析

    鈴木晴大, 迫田和馬, 田中佑, 田中佑, 白岩立彦

    日本作物学会講演会要旨集   244th   2017

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  • 染色体断片置換系統群(CSSLs)を用いたダイズの個葉光合成能力に寄与する遺伝的要因の解明

    迫田和馬, 田中佑, 鈴木晴大, 加賀秋人, 石本政男, 白岩立彦

    日本作物学会講演会要旨集   243rd   2017

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  • ダイズにおける個葉光合成能力および葉内コンダクタンスの遺伝的変異について

    迫田和馬, 迫田和馬, 田中佑, 田中佑, KROMDIJK Johannes, 白岩立彦, NELSON Randall, LONG Stephen P.

    日本作物学会講演会要旨集   241st   2016

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  • リーフパンチを利用したダイズ個葉における炭素安定同位体の簡易分析法の検討

    福田 泰子, 片山 寛斗, 田中 佑, 白岩 立彦

    日本作物学会紀事   85 ( 別1 )   207 - 207   2015.3

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  • イネ直立穂品種と非直立穂品種の交雑集団における高光合成系統の探索

    大石 晃史, 田中 佑, 徐 正進, 白岩 立彦

    日本作物学会紀事   85 ( 別1 )   87 - 87   2015.3

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  • イズ高光合成系統の個葉における生理・形態的特性の解明

    迫田 和馬, 田中 佑, 白岩 立彦, Randall Nelson

    日本作物学会紀事   85 ( 別1 )   86 - 86   2015.3

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  • The diversity of photosynthetic induction responses among 41 soybean genotypes

    Mochamad Arief Soleh, 田中 佑, Steven Huber, 白岩 立彦

    85 ( 1 )   85 - 85   2015.3

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  • 個葉の光合成誘導反応が圃場条件での積算光合成量におよぼす影響についての一考察

    田中 佑, 本間 香貴

    日本作物学会紀事   85 ( 別1 )   84 - 84   2015.3

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  • Rice heading gene,hd3a increases stomatal conductance under the short day condition

    th International Rice Congress

    2014.11

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  • Dry matter production and nitrogen utilization of high yielding soybean cultivars

    ASA, CSSA, SSSA International Annual Meeting

    2014.11

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  • ダイズ品種間における光合成誘導反応の差異をもたらす生理的要因について

    田中 佑, 岩橋 優, Mochamad Arief Soleh, 白岩 立彦, Stephen P. Long

    日本作物学会紀事   84 ( 別1 )   2014.9

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  • イネ出穂期遺伝子hd3a変異体の個葉及び群落蒸散特性の解析

    岩橋 優, 田中 佑, 伊東 真, 吉竹 良洋, 齊藤 大樹, 奥本 裕, 本間 香貴, 白岩 立彦

    日本作物学会紀事   84 ( 別1 )   58 - 58   2014.9

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  • 突然の強光照射に対するダイズ個葉の光合成誘導反応の品種間差異

    Mochamad Arief Soleh, 田中 佑, 白岩 立彦

    日本作物学会紀事   83 ( 別1 )   96 - 97   2014.3

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  • Nitrogen response of the leaf photosynthetic rate in erect panicle type rice

    Urairi Chihiro, Tanaka Yu, Kawasaki Yohei, Hirooka Yoshihiro, Xu Zhengjin, Shiraiwa Tatsuhiko

    Abstracts of Meeting of the CSSJ   83 ( 別1 )   368 - 369   2014.3

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    DOI： 10.14829/jcsproc.237.0_368

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  • 日米ダイズ品種の子実肥大期間における乾物動態の解析

    川崎 洋平, Rajen Bajgain, 河村 久紀, 桂 圭佑, 田中 佑, 白岩 立彦

    日本作物学会紀事   82 ( 別2 )   166 - 167   2013.9

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  • ダイズの初生葉を対象とした迅速な葉温フェノタイピングの可能性

    田中 佑, 福田 泰子, 白岩 立彦

    日本作物学会紀事   82 ( 別2 )   164 - 165   2013.9

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  • Perspectives of the control of photosynthesis through manipulating the stomatal density

    TANAKA Yu

    82   486 - 487   2013.3

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  • Analysis of Yield Variation in Soybean Genotypes Focused on Pod Production Process

    Fujii Kenichiro, Fukuda Yasuko, Katsura Keisuke, Tanaka Yu, Shiraiwa Tatsuhiko

    Abstracts of Meeting of the CSSJ   82 ( 別1 )   176 - 177   2013.3

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    DOI： 10.14829/jcsproc.235.0_176

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  • Cultivar difference in photosynthetic induction response in soybean

    Nomoto Yuko, Tanaka Yu, Homma Koki, Siraiwa Tatsuhiko

    Abstracts of Meeting of the CSSJ   82 ( 別1 )   382 - 383   2013.3

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    DOI： 10.14829/jcsproc.235.0_382

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  • Homologous genes of FT and ELF3 in rice (Oryza sativa L.) affect stomatal opening and photosynthetic rate

    Iwahashi Yu, Tanaka Yu, Ito Makoto, Yoshitake Yoshihiro, Saito Hiroki, Okumoto Yutaka, Homma Koki

    Abstracts of Meeting of the CSSJ   82 ( 別1 )   380 - 381   2013.3

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    DOI： 10.14829/jcsproc.235.0_380

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  • Radiation use efficiency and leaf gas exchange capacity in US and Japanese soybean cultivars

    FUKUDA Yasuko, TANAKA Yu, FUJII Ken-ichiro, KAWASAKI Yohei, SHIRAIWA Tatsuhiko

    234th   138 - 139   2012.9

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  • Biomass production and yield of soybean grown under optimum condition and with excess water during early growth stage

    BAJGAIN Rajen, KAWASAKI Yohei, AKAMATSU Yusaku, TANAKA Yu, KAWAMURA Hisanori, SHIRAIWA Tatsuhiko

    81   140 - 141   2012.3

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  • 気孔密度の増減がシロイヌナズナのガス交換およびバイオマス生産におよぼす影響

    田中佑, 菅野茂夫, 嶋田知生, 西村いくこ

    第53回日本植物生理学会   53rd   2012.3

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  • Yield and Dry Matter Production of Japanese and US Soybean Cultivars under Drought Stress

    Kawasaki, Y, Tanaka, Y, Katsura, K, Shiraiwa, T

    The 7th Asian Crop Science Conference   2011.9

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  • An Analysis of Factors that Associate Occurrence of Delayed Stem Senescence in Soybean Using Recombinant Inbred Lines Segregated for Stem Growth Habits

    FUJII Kenichiro, TANAKA Yu, KATO Shin, SAYAMA Takashi, NAKAZAKI Tetsuya, ISHIMOTO Masao, SHIRAIWA Tatsuhiko

    80   218 - 219   2011.3

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  • Mapping and Evaluation of QTLs Involved in Stomatal Density in Soybean

    TANAKA Yu, FUJII Kenichiro, SAYAMA Takashi, NAKAZAKI Tetsuya, ISHIMOTO Masao, SHIRAIWA Tatsuhiko

    80   220 - 221   2011.3

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  • Leaf Gas Exchange Characteristics of Soybean [Glycine max. (L.) Merr.] in Relation to Dry Matter Productivity Reviewed

    Yu Tanaka, Yohei Kawasaki, Keisuke Katsura, Tatsuhiko Shiraiwa

    Crop Science Society of America, International Annual Meeting   2010.11

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  • Yield and Dry Matter Productivity of Japanese and US Soybean Cultivars : A Comparison in the warm regions

    KAWASAKI Yohei, TANAKA Yu, KATSURA Keisuke, PURCELL L. C., HOMMA Koki, KATSUBE TANAKA Tomoyuki, SHIRAIWA Tatsuhiko

    Abstracts of Meeting of the CSSJ   79   102 - 103   2010.9

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    DOI： 10.14829/jcsproc.230.0.102.0

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  • Leaf anatomy of soybean [Glycine max. (L.) Merr.] in relation to gas exchange and dry matter productivity. Reviewed

    Y. Tanaka, K. Kawasaki, K. Katsura, T. Shiraiwa

    ASA-CSSA-SSSA International Annual Meetings   2010

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  • Variation of Single Leaf Anatomy and Stomatal Conductance among 58 Soybean Cultivars

    TANAKA Y., SHIRAIWA T.

    Abstracts of Meeting of the CSSJ   78   106 - 107   2009.9

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    DOI： 10.14829/jcsproc.228.0.106.0

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  • Root Morphological Characteristics of Soybean That Determine Lodging Resistance Reviewed

    TSUJIOKA Shiho, SHIRAIWA Tatsuhiko, TANAKA Yu

    227th   320 - 321   2009.3

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  • 57 Influence of Stem Growth Habit on Single Leaf Morphology and Stomatal Conductance in Soybean

    Tanaka Y., Shiraiwa T.

    Japanese Journal of Crop Science   226th ( 2 )   114 - 115   2008.9

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    Language：Japanese   Publisher：The Crop Science Society of Japan  

    DOI： 10.14829/jcsproc.226.0.114.0

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  • ダイズの莢先熟発生機構 発生に関連する木部液サイトカイニン物質の特定

    佐藤順子, 白岩立彦, 田中佑, 西島隆明, 中崎鉄也

    第226回 日本作物学会   2008.9

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    DOI： 10.14829/jcsproc.226.0.84.0

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  • ダイズの耐倒伏性に関する品種特性の解析

    辻岡 志保, 白岩 立彦, 田中 佑

    根の研究 = Root research   17 ( 2 )   67 - 67   2008.6

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  • Morphological approach for genetic improvement of stomatal conductance in soybean Reviewed

    Yu Tanaka, Tatsuhiko Shiraiwa, Azusa Nakajima, Junko Sato, Tetsuya Nakazaki

    5th International Crop Science Congress   2008.4

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  • ダイズ交雑分離集団における気孔コンダクタンスおよび個葉特性の変異とその要因解析

    田中佑, 白岩立彦, 佐藤順子, 中崎鉄也

    日本作物学会講演会要旨・資料集   224th   132 - 133   2007.9

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  • ダイズの莢先熟発生機構 –‘莢先熟性’の関連形質と遺伝的要因–

    松山治樹, 白岩立彦, 佐藤順子, 中崎鉄也, 田中佑

    第224回 日本作物学会   2007.9

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    DOI： 10.14829/jcsproc.224.0.70.0

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  • Contribution of canopy structure and leaf photosynthesis to difference in ability of crop biomass production between Japanese and US soybean cultivars

    Nakajima Azusa, Shiraiwa Tatsuhiko, Tanaka Yu, Homma Koki, Horie Takeshi

    Abstracts of Meeting of the CSSJ   222nd   184 - 185   2006.10

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    DOI： 10.14829/jcsproc.222.0.184.0

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  • Analysis of Leaf Photosynthetic Rate of a Recombinant Population Derived by Crossing Two Soybean Cultivars Differing in Growth Habit

    Tanaka Yu, Shiraiwa Tatsuhiko, Nakazaki Tetsuya, Nakajima Azusa, Satoh Junko, Horie Takeshi

    Abstracts of Meeting of the CSSJ   222nd   186 - 187   2006.10

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    DOI： 10.14829/jcsproc.222.0.186.0

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Presentations

  • Natural Variation of the Non-Steady State Photosynthesis among Rice and Soybean Varieties Invited International conference

    Y. Tanaka, S. Kobayshi, K. Tanaka, R. Kondo

    International Symposium of Agricultural Meteorology  2018.3 

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  • Genetic variation of the leaf photosynthesis under steady and non-steady-state conditions in soybean Invited International conference

    Yu Tanaka

    Photosynthesis and Productivity in a Changing Environment – The 2015 Tokyo Whole Plant Photosynthesis Workshop  2015.5.16 

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  • Utilization of the Variation in Stomatal and Related Traits to Achieve Efficient Photosynthesis in C3 Crop Plants Invited International conference

    Yu Tanaka

    Gordon Research Conferences – CO2 Assimilation in Plants: Genome to Biome  2014.6 

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  • 収量の生理的ポテンシャルの品種間変異

    シンポジウム 「ダイズ研究のすすめ」  2012.9  日本育種学会

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Industrial property rights

  • CO2濃度測定装置、光合成速度測定装置、及び、光合成速度測定法

    田中 佑, 秋山重之

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    Application no：特願2015-124727 

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Research Projects

  • The development of multimodal imaging technology for ion dynamics in super-organism, connecting agricultural fields and molecular biology

    Grant number：24H00499  2024.04 - 2028.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    田野井 慶太朗, 藤田 泰成, 晝間 敬, 田中 佑, 杉田 亮平

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  • イネの光合成・物質生産過程の超大規模解析基盤の構築と有用遺伝資源の探索

    Grant number：24K01741  2024.04 - 2027.03

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    田中 佑, 谷吉 和貴, 安達 俊輔, 高井 俊之

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    Grant amount：\18590000 （ Direct expense: \14300000 、 Indirect expense：\4290000 ）

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  • Genetic analysis of passage cell numbers in roots: towards optimization of water use efficiency of crops

    Grant number：22H02308  2022.04 - 2025.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    山内 卓樹, 田中 佑, 野下 浩司

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    Grant amount：\17550000 （ Direct expense: \13500000 、 Indirect expense：\4050000 ）

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  • Genetic analysis of passage cell numbers in roots: towards optimization of water use efficiency of crops

    Grant number：23K23574  2022.04 - 2025.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    山内 卓樹, 田中 佑, 野下 浩司

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    Grant amount：\17550000 （ Direct expense: \13500000 、 Indirect expense：\4050000 ）

    国連の持続可能な開発目標では, 環境持続性や食料供給の課題が掲げられている．そこで本研究課題では, 土壌中から地上部への水の輸送を最適化することで, 作物の収量の増加や気候変動に対する耐性の強化を見据えた研究を展開する．
    植物の根の表面から吸収された水は, 表皮と皮層を通り中心柱内部の道管に輸送された後, 道管を通して地上部へと運ばれ, 植物の成長を支える葉での光合成に利用される．皮層の最内層（内皮）には, スベリンなどの疎水性の物質が蓄積して水の輸送は阻害されるが, 内皮に点在するスベリンを蓄積しない通過細胞が選択的な水の輸送を担うと考えられる．これまでに, 多収水稲品種では標準品種と比べて通過細胞数が多く, 耐乾性の陸稲品種ではその数が少ないことがわかっているが, 内皮の通過細胞数を制御するメカニズムは未解明である．
    本年度は, 標準水稲品種, 多収水稲品種, 通過細胞数を制御する遺伝子座を両親型でもつ染色体断片置換系統の光合成速度, 気孔コンダクタンスを測定した．その結果, 通過細胞数を制御する候補遺伝子座を多収品種型でもつ系統は標準品種と比べて高い光合成速度と気孔コンダクタンスを示し, 標準品種型の系統は多収品種と比べて高い光合成速度と気孔コンダクタンスを示した．一方, 根長や根数は候補遺伝子座と関連しないことから, 通過細胞数がイネの根における水の輸送に重要であることが示唆された．また, 染色体断片置換系統を戻し交雑して, 通過細胞数の評価をおこない, 候補遺伝子領域の確認と絞りこみをおこなった．これらと併行して, 標準水稲品種と耐乾性陸稲品種を交配したF3系統を自殖しQTL解析に用いる予定のF4世代の種子を得た．さらに, スベリン染色した根の横断切片からスベリン化した内皮細胞数を自動で抽出してカウントする画像処理法を概ね確立した．

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  • 時系列並列解析によるイネ光合成誘導の多様性および遺伝要因の解明

    Grant number：21K19104  2021.07 - 2024.03

    日本学術振興会  科学研究費助成事業  挑戦的研究(萌芽)

    安達 俊輔, 田中 佑

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    Grant amount：\6500000 （ Direct expense: \5000000 、 Indirect expense：\1500000 ）

    光強度の変化に対する光合成誘導の遅れは、作物の生産量の約20%を損失させる要因である。本研究は日本の温帯ジャポニカイネ品種の光合成誘導の多様性を評価するとともに、その生理要因と遺伝要因を明らかにすることを目的とした。2021年度には、在来品種と育成品種を含む日本で育成されたイネ166品種をポット栽培し、弱光環境から強光環境に変化させた際の光合成誘導の多様性を評価した。その結果、強光照射後10分間のCO2同化積算値（CCF10）に、約8倍の変異があることが認められた。なかでも愛国もちのCCF10がきわめて高く、光合成誘導を加速する有用遺伝子を有していると考えられた。CCF10は、誘導反応中の平均気孔コンダクタンスと正の相関 (r = 0.87)を示し、平均葉内CO2濃度と負の相関（r = -0.69）を示した。すなわち、日本の水稲品種の光合成誘導反応の変異には気孔を介したCO2供給が影響するものの、葉のCO2固定活性の影響がそれ以上に大きく、結果的に平均葉内CO2濃度と負の相関を示したと解釈された。さらにCCF10は強光照射直前の光合成速度と有意な相関を示した（r = 0。66）。これは世界のイネコアコレクションで見られた結果と同様であり、弱光下での光合成活性がその後の強光に対する光合成応答に重要であることが示唆された。以上のように光合成誘導の多様性とその生理要因の一端を明らかにすることができた。

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  • A quantitative analysis on the factors to increase occurrence of soil-born diseases in soybean

    Grant number：21H02172  2021.04 - 2024.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    白岩 立彦, 田中 貴, 田中 佑, 田中 千尋, 本間 香貴

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    Grant amount：\16380000 （ Direct expense: \12600000 、 Indirect expense：\3780000 ）

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  • 深層学習に基づくイネバイオマスの汎用的推定モデル構築とその応用

    Grant number：20H02968  2020.04 - 2023.03

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    田中 佑, 桂 圭佑, 辻本 泰弘, 高井 俊之

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    Grant amount：\17550000 （ Direct expense: \13500000 、 Indirect expense：\4050000 ）

    作物の地上部全乾物重（以下バイオマス）は最も基本的かつ重要な生育情報である．本研究では，近年著しく進歩しつつある機械学習の一手法である深層学習を応用し，群落の可視画像から多様なイネのバイオマスを高精度に推定する汎用的モデルを作成する．さらに簡便かつ高精度な非破壊推定技術に基づいた，イネバイオマスの遺伝的・空間的変動評価系を確立することを目指す．
    2020年度は，主に本研究計画の基盤となるバイオマス推定モデルを構築した．京都大学，および東京農工大学において水田に生育する隣接2株のイネを中心とした可視画像を撮影し，対応するバイオマスを実測することでデータベースを構築した．収集したバイオマスデータは2579点，対応する画像は複数枚を撮影することで12183枚に達するデータベースとなった．これらを対象に深層学習モデルを構築した．構築したモデルは，検証用データに対してR2値が0.95，相対平方根平均二乗誤差（rRMSE）が18.6%の高い精度でバイオマスを推定することができた．特に，これまで他の非破壊調査手法では誤差が大きくなる傾向にあった高バイオマス領域においても本モデルは高い推定精度を維持しており，およそイネの出穂後1週間程度までのバイオマス推定が可能であった．
    一方，モデル構築に用いなかった未知の品種から構成される予測用データに対しては，およそ9.1t ha-1以下のバイオマスに対してはR2値が0.87，rRMSEが27.7%の精度を示したものの，それ以上の高バイオマスを有する群落に対しては正確な推定値を出力できなかった．

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  • 葉のガス交換の直接計測によるイネ光合成QTLの同定手法の開発

    Grant number：19H02939  2019.04 - 2023.03

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    安達 俊輔, 松岡 信, 田中 佑

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    Grant amount：\17160000 （ Direct expense: \13200000 、 Indirect expense：\3960000 ）

    作物の光合成測定の迅速化のため、葉1枚あたりCO2同化速度の測定時間を従来の1/10以下に短縮した新型迅速光合成測定装置MIC-100を開発した。本研究はMIC-100を用いてCO2同化速度に関わるゲノムワイド関連解析（GWAS）を実施し、日本で育成されたイネ198品種の光合成変異をもたらす新規遺伝子の特定を目指す。さらに肥料条件とCO2同化速度の遺伝×環境相互作用を制御する新規ゲノム領域の特定を目指す。これまでの検討で、イネ品種間のCO2同化速度には約3倍の変異が認められた。さらに在来品種に比較して近代育成品種が有意に高いCO2同化速度を示すことを認めた。一方近代育成品種の光合成速度と育成年次との関係は認められなかった。したがって、在来品種に比べると育成品種は光合成速度の高いものが選ばれたが、近代育種の過程で光合成速度は改良されていないと判断すべきである。品種間変異の生理的要因については、クロロフィル量や葉の厚さとCO2同化速度の間に有意な関係は認められず、光合成速度の変異にはこれら以外の性質が深く関わると示唆された。3年間にわたるGWASの年次反復実験によって、CO2同化速度に関与する計5箇所のゲノム領域を同定した。さらに複数年次データの主成分分析スコアを利用したGWASでは、明瞭なピークが第4染色体、第8染色体にそれぞれ見いだされた。すなわちこれら2つのゲノム領域の信頼性が高く、今後の遺伝子単離のターゲットになりうることが示唆された。以上のようにこれまで実現されてこなかったCO2同化速度に関わるGWASが本研究で実現した。今後は見いだされたゲノム領域の確認と遺伝子特定に向けて検討を進めるとともに、遺伝×環境相互作用する光合成ゲノム領域の特定を進める。

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  • Design and evaluation of super-high yielding growth type of soybean based on genotype by environment interaction

    Grant number：19H02943  2019.04 - 2023.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Saitoh Kuniyuki

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    Grant amount：\17420000 （ Direct expense: \13400000 、 Indirect expense：\4020000 ）

    To analyze the relationship between sowing time and maturity time to maximize high-yielding potential of soybean in each environment, we investigated the interaction between environment and genotype in yield using CLARK-NILs, near-isogenic lines differing only in maturity time, grown under the same cultivation conditions from Hokkaido, to Kyushu, Japan. The results of the four-year study showed that the early-maturing e1 genotype produced higher yields in Hokkaido, while the late-maturing E1 genotype produced higher yields in the southwestern Japan, and both E2 and E3 genes increased yields by extending the vegetative growth period in the e1 genotypes. Comparison of yield performance among high-yielding US cultivars demonstrated super-high yields of UA4805, 459g/m2 and UA4910, 527g/m2, which were related to the higher number of flowers and rate of podding.

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  • Development of non-steady state canopy photosynthesis model for soybean based on continuous measurement of canopy surface temperature

    Grant number：17H03755  2017.04 - 2020.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Homma Koki

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    Grant amount：\16250000 （ Direct expense: \12500000 、 Indirect expense：\3750000 ）

    We studied the canopy photosynthesis of soybean under unsteady state condition based on the measurement of surface temperature. For the purpose, following topics were conducted: (1) modeling of leaf photosynthetic rate under unsteady state condition, (2) evaluation of canopy resistance based on canopy surface temperature measurement, (3) evaluation of vertical distribution dynamics of canopy, (4) evaluation of transpiration rate by stem heat balance method. The results of each topic were published in journals or presented in society conferences, etc. The further applications have also been established. For example, the evaluation method for the dynamics of the vertical distribution of canopy was applied to cultivar mixed cultivation of soybean. Based on the results of (1) to (4), a canopy photosynthesis model was developed. The model will be improved by validation with carbon balance by the assimilation box method.

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  • High [CO2] adaptation of soybeans in terms of the single leaf photosynthesis

    Grant number：15K18634  2015.04 - 2018.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    Tanaka Yu

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    Grant amount：\3900000 （ Direct expense: \3000000 、 Indirect expense：\900000 ）

    The leaf photosynthesis is one of the most important trait to determine the soybean productivity. This study elucidated that a local variety, PI603911C, showed the extremely high photosynthetic rate under the ambient and high CO2 condition. This phenotype is partly attributed to the greater carboxylation activity in the mesophyll cells. This study also detected several soybean varieties having high photosynthetic rate. Notably, these varieties achieved high photosynthetic rate with different physiological mechanisms. It is expected that this study provides useful information to the future soybean breeding programs.

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  • Evaluation of potential productivity of soybean in tropical environment and investigation of adaptive

    Grant number：25257410  2013.04 - 2018.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    Shiraiwa Tatsuhiko, Sanichon Jirawat, Iskandar Lubis, Saryoko Andy

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    Grant amount：\41730000 （ Direct expense: \32100000 、 Indirect expense：\9630000 ）

    A statistical analysis on regional and decadal variation of climate and soybean yield showed that soybean production is potentially negatively affected by high temperature. Divergent varieties including World Soybean Mini Core-collection were grown in the field under tropical climate. It was proved that soybeans from temperate region is lower yielding than those from tropical regions and Japanese soybeans were particularly less stable in yield and seed quality. The crop physiological attributes were examined for tropical and temperate varieties under tropical environment. Temperate soybeans showed inferior physiological activity of crop canopy than tropical elite variety and this was attributed to difference in leaf conductance and stomatal density. For future breeding of better adaptation to increased temperature, two varieties, DS25-1 from USA and Tanggamus from Indonesia were selected by their high and stable performance of quality, harvest index and/or biomass productivity.

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  • Alternative methodology for screening responsive cultivars to elevated atmospheric CO2 concentration in crops

    Grant number：25292011  2013.04 - 2016.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Shimono Hiroyuki, TANAKA Yu, KAWASAKI Michio, YOSHIHIRA Taiki, AOKI Naoto, KUMAGAI Etsushi, SHIRAIWA Tatsuhiko, SASAKI Haruto

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    Grant amount：\18850000 （ Direct expense: \14500000 、 Indirect expense：\4350000 ）

    To feed future world population, adaptive cultivar against increasing atmospheric CO2, which increase photosynthesis, biomass and productivity, is an option to boost crop productivity. The purpose of this research is to identify alternative, cheap and reliable methodologies to screen responsive cultivars to future elevated CO2 without using CO2 fumigation facilities for crops, rice and soybean. Six hypotheses were tested, (1) low CO2 chamber method, (2) stomatal sensitivity method, (3) planting geometry method, (4) Finlay Wilkinson regression method, (5) Rural-Urban gradient method, (6) natural CO2 spring method. We concluded that (3) planting geometry method and (4) Finlay Wilkinson regression method can be used for alternative screening method without using CO2 fumigation facilities.

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  • Course Seminar 3 （2024academic year） 1st and 2nd semester  - その他

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  • Seminar in Crop Production Science （2023academic year） Late  - その他

  • Control in Food Crop Production 2 （2023academic year） Second semester  - 金3,金4

  • Undergraduate's-level thesis research （2023academic year） 1st-4th semester  - その他

  • Crop Production Science 1 （2023academic year） 1st semester  - 月3,月4

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Media Coverage

  • Revolutionizing Rice Yield Prediction: Groundbreaking Study Utilizes Deep Learning for Sustainable Agriculture Internet

    AlphaGalileo  2023.12

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  • CNN-Based Model Can Accurately Estimate Rice Yield From Canopy Images Internet

    AZO Life Sciences  2023.8

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  • Artificial intelligence can now estimate rice yields, according to new study Internet

    EurekAlert!  2023.8

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  • Artificial intelligence can now estimate rice yields, according to new study Internet

    Science Daily  2023.8

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  • 水稲収量 アプリ推定 Newspaper, magazine

    日本農業新聞  2023.8

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  • 岡山大，イネの収穫量1秒で Newspaper, magazine

    日経産業新聞  2023.8

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    日本経済新聞社  2023.7

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    山陽新聞  2023.7

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