Updated on 2026/06/18

写真a

 
TSUDA KATSUTOSHI
 
Organization
Undergraduate School School of Agriculture Associate Professor
Title
Associate Professor
Profile

イネの花序や茎が生まれるしくみと生存戦略の研究をおこなっています。形態形成・発生学は丹念な記述を要する分野ですが、そこには驚くべき多様性と植物ならではの美しい原理が秘められています。それを一つでも多く紐解き、伝えることが目標です。

過去の研究紹介

茎の節と節間ができるしくみを解明

茎の節間は最後に生まれてくる-茎の発生学への挑戦-

イネ形態形成の遺伝的基盤と育種利用に関する総説を発表

単子葉植物の茎に特徴的な形態形成を制御するメカニズム

External link

Degree

  • PhD ( 2010.9   The Graduate University for Advanced Studies )

Research Interests

  • Transcription factor

  • 遺伝育種

  • Vascular bundle

  • Cell differentiation

  • Shoot meristem

  • Stem

  • 野生イネ

Research Areas

  • Life sciences / Plants: molecular biology and physiology

  • Life sciences / Developmental biology

  • Environmental science/Agricultural science / Plant genetics and breeding

Education

  • The Graduate University for Advanced Studies   School of Life Science   Department of Genetics

    2005.10 - 2010.9

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  • 京都大学大学院   農学研究科   地域環境科学専攻

    2005.3 - 2005.9

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  • Kyoto University   Faculty of Agriculture   Faculty of Agriculture

    2001.4 - 2005.3

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Research History

  • Meiji University   School of Agriculture Department of Agriculture   Associate Professor

    2026.4

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  • Yokohama City University   Visiting Assistant Professor

    2025.4 - 2026.4

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  • Nagoya University   Bioscience and Biotechnology Center   Senior Assistant Professor (non-tenured)

    2025.4 - 2026.4

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  • National Institute of Genetics   Assistant Professor (non-tenured)

    2015.4 - 2025.3

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  • University of California, Berkeley

    2013.4 - 2015.3

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  • University of California, Berkeley   Researcher

    2012.4 - 2013.3

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  • National Institute of Genetics

    2010.4 - 2012.3

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Professional Memberships

Committee Memberships

  • 日本植物生理学会   会計幹事  

    2025.3   

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    Committee type:Academic society

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  • ナショナルバイオリソースプロジェクト(NBRP)イネ   運営委員  

    2015.4 - 2025.3   

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    Committee type:Other

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Papers

  • Evolution of the sporophyte shoot axis and functions of TALE HD transcription factors in stem development. Invited Reviewed International journal

    Katsutoshi Tsuda

    Current opinion in plant biology   81   102594 - 102594   2024.6

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

    The stem is one of the major organs in seed plants and is important for plant survival as well as in agriculture. However, due to the lack of clear external landmarks in many species, its developmental and evolutionary processes are understudied compared to other organs. Recent approaches tackling these problems, especially those focused on KNOX1 and BLH transcription factors belonging to the TALE homeodomain superfamily have started unveiling the patterning process of nodes and internodes by connecting previously accumulated knowledge on lateral organ regulators. Fossil records played crucial roles in understanding the evolutionary process of the stem. The aim of this review is to introduce how the stem evolved from ancestorial sporophyte axes and to provide frameworks for future efforts in understanding the developmental process of this elusive but pivotal organ.

    DOI: 10.1016/j.pbi.2024.102594

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  • YABBY and diverged KNOX1 genes shape nodes and internodes in the stem. Reviewed International journal

    Katsutoshi Tsuda, Akiteru Maeno, Ayako Otake, Kae Kato, Wakana Tanaka, Ken-Ichiro Hibara, Ken-Ichi Nonomura

    Science (New York, N.Y.)   384 ( 6701 )   1241 - 1247   2024.6

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

    Plant stems comprise nodes and internodes that specialize in solute exchange and elongation. However, their boundaries are not well defined, and how these basic units arise remains elusive. In rice with clear nodes and internodes, we found that one subclade of class I knotted1-like homeobox (KNOX1) genes for shoot meristem indeterminacy restricts node differentiation and allows internode formation by repressing YABBY genes for leaf development and genes from another node-specific KNOX1 subclade. YABBYs promote nodal vascular differentiation and limit stem elongation. YABBY and node-specific KNOX1 genes specify the pulvinus, which further elaborates the nodal structure for gravitropism. Notably, this KNOX1 subclade organization is specific to seed plants. We propose that nodes and internodes are distinct domains specified by YABBY-KNOX1 cross-regulation that diverged in early seed plants.

    DOI: 10.1126/science.adn6748

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  • Heat shock-inducible clonal analysis reveals the stepwise establishment of cell fate in the rice stem. Reviewed International journal

    Katsutoshi Tsuda, Akiteru Maeno, Ken-Ichi Nonomura

    The Plant Cell   2023.9

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

    The stem, consisting of nodes and internodes, is the shoot axis which supports aboveground organs and connects them to roots. In contrast to other organs, developmental processes of the stem remain elusive, especially those initiating nodes and internodes. By introducing an intron into the Cre recombinase gene, we established a heat shock-inducible clonal analysis system in a single binary vector and applied it to the stem in the flag leaf phytomer of rice (Oryza sativa). With detailed characterizations of stem structure and development, we show that cell fate acquisition for each domain of the stem occurs stepwise. Cell fate for a single phytomer was established in the shoot apical meristem (SAM) by one plastochron before leaf initiation. Cells destined for the foot (non-elongating domain at the stem base) also started emerging before leaf initiation. Cell fate acquisition for the node began just before leaf initiation at the flank of the SAM, separating cell lineages for leaves and stems. Subsequently, cell fates for the axillary bud were established in early leaf primordia. Finally, cells committed to the internode emerged from, at most, a few cell tiers of the 12-25-cell stage stem epidermis. Thus, internode cell fate is established last during stem development. This study provides the groundwork to unveil underlying molecular mechanisms in stem development and a valuable tool for clonal analysis, which can be applied to various species.

    DOI: 10.1093/plcell/koad241

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  • Genetic basis controlling rice plant architecture and its modification for breeding Invited Reviewed

    Wakana Tanaka, Takaki Yamauchi, Katsutoshi Tsuda

    Breeding Science   73 ( 1 )   3 - 45   2023.3

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

    The shoot and root system architectures are fundamental for crop productivity. During the history of artificial selection of domestication and post-domestication breeding, the architecture of rice has significantly changed from its wild ancestor to fulfil requirements in agriculture. We review the recent studies on developmental biology in rice by focusing on components determining rice plant architecture; shoot meristems, leaves, tillers, stems, inflorescences and roots. We also highlight natural variations that affected these structures and were utilized in cultivars. Importantly, many core regulators identified from developmental mutants have been utilized in breeding as weak alleles moderately affecting these architectures. Given a surge of functional genomics and genome editing, the genetic mechanisms underlying the rice plant architecture discussed here will provide a theoretical basis to push breeding further forward not only in rice but also in other crops and their wild relatives.

    DOI: 10.1270/jsbbs.22088

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  • Comparison of constitutive promoter activities and development of maize ubiquitin promoter- and Gateway-based binary vectors for rice Reviewed

    Katsutoshi Tsuda, Toshiya Suzuki, Manaki Mimura, Ken-Ichi Nonomura

    Plant Biotechnology   39 ( 2 )   139 - 146   2022.6

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:Japanese Society for Plant Cell and Molecular Biology  

    DOI: 10.5511/plantbiotechnology.22.0120a

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  • OryzaGenome2.1: Database of Diverse Genotypes in Wild Oryza Species. Reviewed International journal

    Hiromi Kajiya-Kanegae, Hajime Ohyanagi, Toshinobu Ebata, Yasuhiro Tanizawa, Akio Onogi, Yuji Sawada, Masami Yokota Hirai, Zi-Xuan Wang, Bin Han, Atsushi Toyoda, Asao Fujiyama, Hiroyoshi Iwata, Katsutoshi Tsuda, Toshiya Suzuki, Misuzu Nosaka-Takahashi, Ken-Ichi Nonomura, Yasukazu Nakamura, Shoko Kawamoto, Nori Kurata, Yutaka Sato

    Rice (New York, N.Y.)   14 ( 1 )   24 - 24   2021.3

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

    BACKGROUND: OryzaGenome ( http://viewer.shigen.info/oryzagenome21detail/index.xhtml ), a feature within Oryzabase ( https://shigen.nig.ac.jp/rice/oryzabase/ ), is a genomic database for wild Oryza species that provides comparative and evolutionary genomics approaches for the rice research community. RESULTS: Here we release OryzaGenome2.1, the first major update of OryzaGenome. The main feature in this version is the inclusion of newly sequenced genotypes and their meta-information, giving a total of 217 accessions of 19 wild Oryza species (O. rufipogon, O. barthii, O. longistaminata, O. meridionalis, O. glumaepatula, O. punctata, O. minuta, O. officinalis, O. rhizomatis, O. eichingeri, O. latifolia, O. alta, O. grandiglumis, O. australiensis, O. brachyantha, O. granulata, O. meyeriana, O. ridleyi, and O. longiglumis). These 19 wild species belong to 9 genome types (AA, BB, CC, BBCC, CCDD, EE, FF, GG, and HHJJ), representing wide genomic diversity in the genus. Using the genotype information, we analyzed the genome diversity of Oryza species. Other features of OryzaGenome facilitate the use of information on single nucleotide polymorphisms (SNPs) between O. sativa and its wild progenitor O. rufipogon in rice research, including breeding as well as basic science. For example, we provide Variant Call Format (VCF) files for genome-wide SNPs of 33 O. rufipogon accessions against the O. sativa reference genome, IRGSP1.0. In addition, we provide a new SNP Effect Table function, allowing users to identify SNPs or small insertion/deletion polymorphisms in the 33 O. rufipogon accessions and to search for the effect of these polymorphisms on protein function if they reside in the coding region (e.g., are missense or nonsense mutations). Furthermore, the SNP Viewer for 446 O. rufipogon accessions was updated by implementing new tracks for possible selective sweep regions and highly mutated regions that were potentially exposed to selective pressures during the process of domestication. CONCLUSION: OryzaGenome2.1 focuses on comparative genomic analysis of diverse wild Oryza accessions collected around the world and on the development of resources to speed up the identification of critical trait-related genes, especially from O. rufipogon. It aims to promote the use of genotype information from wild accessions in rice breeding and potential future crop improvements. Diverse genotypes will be a key resource for evolutionary studies in Oryza, including polyploid biology.

    DOI: 10.1186/s12284-021-00468-x

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  • Collection, preservation and distribution of <i>Oryza</i> genetic resources by the National Bioresource Project RICE (NBRP-RICE) Invited Reviewed

    Yutaka Sato, Katsutoshi Tsuda, Yoshiyuki Yamagata, Hiroaki Matsusaka, Hiromi Kajiya-Kanegae, Yuri Yoshida, Ayumi Agata, Kim Nhung Ta, Sae Shimizu-Sato, Toshiya Suzuki, Misuzu Nosaka-Takahashi, Takahiko Kubo, Shoko Kawamoto, Ken-Ichi Nonomura, Hideshi Yasui, Toshihiro Kumamaru

    Breeding Science   71 ( 3 )   291 - 298   2021

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    DOI: 10.1270/jsbbs.21005

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  • Agrobacterium-Mediated Genetic Transformation of Wild Oryza Species Using Immature Embryos. Reviewed International journal

    Sae Shimizu-Sato, Katsutoshi Tsuda, Misuzu Nosaka-Takahashi, Toshiya Suzuki, Seijiro Ono, Kim Nhung Ta, Yuri Yoshida, Ken-Ichi Nonomura, Yutaka Sato

    Rice (New York, N.Y.)   13 ( 1 )   33 - 33   2020.6

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    Genetic transformation is one of the most important technologies for revealing or modulating gene function. It is used widely in both functional genomics and molecular breeding of rice. Demands on its use in wild Oryza species is increasing because of their high genetic diversity. Given the difficulties in genetic crosses between distantly related species, genetic transformation offers a way to alter or transfer genetic traits in wild rice accessions. However, transformation of wild Oryza accessions by conventional methods using calli induced from scutellum tissue of embryos in mature seeds often fails. Here, we report methods using immature embryos for the genetic transformation of a broad range of Oryza species. First, we investigated the ability of callus induction and regeneration from immature embryos of 192 accessions in 20 species under several culture conditions. We regenerated plants from immature embryos of 90 accessions in 16 species. Next, we optimized the conditions of Agrobacterium infection using a vector carrying the GFP gene driven by the maize ubiquitin promoter. GFP signals were observed in 51 accessions in 11 species. We analyzed the growth and seed set of transgenic plants of O. barthii, O. glumaepatula, O. rufipogon, and O. brachyantha. The plants grew to maturity and set seeds normally. Southern blot analyses using DNA from T0 plants showed that all GFP plants were derived from independent transformation events. We confirmed that the T-DNAs were transmitted to the next generation through the segregation of GFP signals in the T1 generation. These results show that many Oryza species can be transformed by using modified immature-embryo methods. This will accelerate the use of wild Oryza accessions in molecular genetic analyses and molecular breeding.

    DOI: 10.1186/s12284-020-00394-4

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  • Class I KNOX Gene <i>OSH1</i> is Indispensable for Axillary Meristem Development in Rice Reviewed

    Wakana Tanaka, Katsutoshi Tsuda, Hiro-Yuki Hirano

    CYTOLOGIA   84 ( 4 )   343 - 346   2019.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:International Society of Cytology  

    DOI: 10.1508/cytologia.84.343

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  • Heat Induced Epitope Retrieval (HIER) Assisted Protein Immunostaining in Maize Invited Reviewed

    Katsutoshi Tsuda, George Chuck

    BIO-PROTOCOL   2019.6

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

    DOI: 10.21769/bioprotoc.3260

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  • BELL1-like homeobox genes regulate inflorescence architecture and meristem maintenance in rice. Reviewed

    Ikeda T, Tanaka W, Toriba T, Suzuki C, Maeno A, Tsuda K, Shiroishi T, Kurata T, Sakamoto T, Murai M, Matsusaka H, Kumamaru T, Hirano HY

    The Plant journal : for cell and molecular biology   98 ( 3 )   465 - 478   2019.5

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

    DOI: 10.1111/tpj.14230

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/tpj.14230

  • EAT1 transcription factor, a non-cell-autonomous regulator of pollen production, activates meiotic small RNA biogenesis in rice anther tapetum Reviewed

    Seijiro Ono, Hua Liu, Katsutoshi Tsuda, Eigo Fukai, Keisuke Tanaka, Takuji Sasaki, Ken-Ichi Nonomura

    PLoS Genetics   14 ( 2 )   e1007238   2018.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Public Library of Science  

    DOI: 10.1371/journal.pgen.1007238

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  • Micro-computed Tomography to Visualize Vascular Networks in Maize Stems Invited Reviewed

    Akiteru Maeno, Katsutoshi Tsuda

    Bio-protocol   8 ( 01 )   2018.1

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Bio-Protocol, LLC  

    DOI: 10.21769/BioProtoc.2682

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  • KNOTTED1 Cofactors, BLH12 and BLH14, Regulate Internode Patterning and Vein Anastomosis in Maize Reviewed

    Katsutoshi Tsuda, Maria-Jazmin Abraham-Juarez, Akiteru Maeno, Zhaobin Dong, Dale Aromdee, Robert Meeley, Toshihiko Shiroishi, Ken-ichi Nonomura, Sarah Hake

    PLANT CELL   29 ( 5 )   1105 - 1118   2017.5

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

    DOI: 10.1105/tpc.16.00967

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  • Diverse functions of KNOX transcription factors in the diploid body plan of plants Invited Reviewed

    Katsutoshi Tsuda, Sarah Hake

    CURRENT OPINION IN PLANT BIOLOGY   27   91 - 96   2015.10

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    Authorship:Lead author   Language:English  

    DOI: 10.1016/j.pbi.2015.06.015

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  • Genome-Wide Study of KNOX Regulatory Network Reveals Brassinosteroid Catabolic Genes Important for Shoot Meristem Function in Rice Reviewed

    Katsutoshi Tsuda, Nori Kurata, Hajime Ohyanagi, Sarah Hake

    PLANT CELL   26 ( 9 )   3488 - 3500   2014.9

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    DOI: 10.1105/tpc.114.129122

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  • Organ fusion and defective shoot development in oni3 mutants of rice Reviewed

    Takafumi Akiba, Ken-Ichiro Hibara, Fumiko Kimura, Katsutoshi Tsuda, Kiko Shibata, Mayu Ishibashi, Chihiro Moriya, Kiyotaka Nakagawa, Nori Kurata, Jun-Ichi Itoh, Yukihiro Ito

    PLANT AND CELL PHYSIOLOGY   55 ( 1 )   42 - 51   2014.1

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    DOI: 10.1093/pcp/pct154

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  • ONION2 Fatty Acid Elongase is Required for Shoot Development in Rice Reviewed

    Katsutoshi Tsuda, Takafumi Akiba, Fumiko Kimura, Mayu Ishibashi, Chihiro Moriya, Kiyotaka Nakagawa, Nori Kurata, Yukihiro Ito

    PLANT AND CELL PHYSIOLOGY   54 ( 2 )   209 - 217   2013.2

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

    DOI: 10.1093/pcp/pcs169

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  • Positive Autoregulation of a KNOX Gene Is Essential for Shoot Apical Meristem Maintenance in Rice Reviewed

    Katsutoshi Tsuda, Yukihiro Ito, Yutaka Sato, Nori Kurata

    PLANT CELL   23 ( 12 )   4368 - 4381   2011.12

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

    DOI: 10.1105/tpc.111.090050

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  • Fatty acid elongase is required for shoot development in rice Reviewed

    Yukihiro Ito, Fumiko Kimura, Kazuma Hirakata, Katsutoshi Tsuda, Tomoaki Takasugi, Mitsugu Eiguchi, Kiyotaka Nakagawa, Nori Kurata

    PLANT JOURNAL   66 ( 4 )   680 - 688   2011.5

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    DOI: 10.1111/j.1365-313X.2011.04530.x

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  • Isolation and mapping of three rice mutants that showed ectopic expression of KNOX genes in leaves Reviewed

    Katsutoshi Tsuda, Yukihiro Ito, Shinichiro Yamaki, Akio Miyao, Hirohiko Hirochika, Nori Kurata

    PLANT SCIENCE   177 ( 2 )   131 - 135   2009.8

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

    DOI: 10.1016/j.plantsci.2009.04.007

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  • Identification of mutants with impaired regulation of KNOX genes expression Reviewed

    Tsuda K, Ito Y, Miyao A, Hirochika H, Kurata N

    Rice Genetics Newsletter   24   12 - 13   2008

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

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  • SCARECROW functions in root radial patterning in rice to organize multiple cortical cell layers

    Jingxia Li, Shoya Minami, Katsutoshi Tsuda, Takaki Yamauchi

    Plant Physiology   2026.2

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    DOI: 10.1093/plphys/kiaf677

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  • Detection of QTLs regulating the second internode length in rice dwarf mutant d1 Reviewed

    Quynh T. Ha, Sandar Moe, Vincent Pamugas Reyes, Kazuyuki Doi, Kotaro Miura, Mio Mizushima, Akiteru Maeno, Katsutoshi Tsuda, Keisuke Nagai, Motoyuki Ashikari

    Breeding Science   2024

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    Publishing type:Research paper (scientific journal)   Publisher:Japanese Society of Breeding  

    DOI: 10.1270/jsbbs.24036

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  • The attraction of genus <i>Oryza</i>

    Ishikawa Ryo, Yamagata Yoshiyuki, Koide Yohei, Ishii Takashige, Ishikawa Ryuji, Akimoto Masahiro, Tsuda Katsutoshi, Fujita Daisuke

    Breeding Research   advpub   2023

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    Language:Japanese   Publisher:Japanese Society of Breeding  

    DOI: 10.1270/jsbbr.25.w03

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  • Rice GLUCAN SYNTHASE-LIKE5 promotes anther callose deposition to maintain meiosis initiation and progression. Reviewed International journal

    Harsha Somashekar, Manaki Mimura, Katsutoshi Tsuda, Ken-Ichi Nonomura

    Plant physiology   2022.10

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    Callose is a plant cell-wall polysaccharide whose deposition is spatiotemporally regulated in various developmental processes and environmental stress responses. Appearance of callose in premeiotic anthers is a prominent histological hallmark for the onset of meiosis in flowering plants; however, the biological role of callose in meiosis remains unknown. Here we show that rice (Oryza sativa) GLUCAN SYNTHASE LIKE5 (OsGSL5), a callose synthase, localizes on the plasma membrane of pollen mother cells (PMCs) and is responsible for biogenesis of callose in anther locules through premeiotic and meiotic stages. In Osgsl5 mutant anthers mostly lacking callose deposition, aberrant PMCs accompanied by aggregated, unpaired or multivalent chromosomes were frequently observed, and furthermore, a considerable number of mutant PMCs had untimely progress into meiosis compared to that of wild-type PMCs. Immunostaining of meiosis-specific protein HOMOLOGOUS PAIRING ABERRATION IN RICE MEIOSIS2 (PAIR2) in premeiotic PMCs revealed precocious meiosis entry in Osgsl5 anthers. These findings provide insights into the function of callose in controlling the timing of male meiosis initiation and progression, in addition to roles in microsporogenesis, in flowering plants.

    DOI: 10.1093/plphys/kiac488

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  • Rice Expression Atlas In Reproductive Development Reviewed

    Masahiro Fujita, Youko Horiuchi, Yayoi Ueda, Yoko Mizuta, Takahiko Kubo, Kentaro Yano, Shinichiro Yamaki, Katsutoshi Tsuda, Toshifumi Nagata, Mitsuru Niihama, Hirotaka Kato, Shunsuke Kikuchi, Kazuki Hamada, Takako Mochizuki, Takeshi Ishimizu, Hiroaki Iwai, Nobuhiro Tsutsumi, Nori Kurata

    PLANT AND CELL PHYSIOLOGY   51 ( 12 )   2060 - 2081   2010.12

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    DOI: 10.1093/pcp/pcq165

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Books

  • 地味な「茎」に潜む進化のドラマ──「節」と「節間」が生まれるまで

    津田勝利( Role: Sole authorエッセイ)

    岩波「科学」  2025.1 

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    Responsible for pages:6   Book type:General book, introductory book for general audience

    コンタクトを頂ければ、PDFを配布することができます。

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  • Chromatin Immunoprecipitation from Shoot Apices and Young Panicles of Rice

    Katsutoshi Tsuda( Role: Contributor)

    2024.11  ( ISBN:9781071642030

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  • Three-Dimensional Multiphoton Imaging of Transcription Factor by ClearSee

    Yoko Mizuta, Katsutoshi Tsuda( Role: Contributor)

    2018.7  ( ISBN:9781493986569

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  • Plant Transcription Factors: Evolutionary, Structural and Functional Aspects

    Katsutoshi Tsuda, Sarah Hake, Daniel H Gonzalez( Role: Contributor)

    Academic Press  2015.8  ( ISBN:0128008547

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    Total pages:434   Responsible for pages:215-228   Language:English   Book type:Scholarly book

    Chapter 14, "Homeobox Transcription Factors and the Regulation of Meristem Development and Maintenance".

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MISC

  • Genetic and epigenetic changes associated with ancient allopolyploidization of Oryza coarctata, the only halophyte in the genus Oryza

    西山典秀, 望月孝子, 坂本美佳, 谷澤靖洋, 津田勝利, 佐藤(志水)佐江, 吉川貴徳, 稲垣宗一, 中村保一, 豊田敦, 佐藤豊

    育種学研究   27   2025

Presentations

  • A factor promoting male gamete transmission in rice

    Katsutoshi Tsuda

    Cold Spring Harbor Asia Conference  2025.5 

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    Event date: 2025.5

    Language:English   Presentation type:Poster presentation  

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  • Genome analysis of the highly salt-tolerant wild rice Oryza coarctata

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    Event date: 2024.9

    Language:Japanese  

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  • Cell fate for the internode is established last among organs in a phytomer in rice.

    Katsutoshi Tsuda, Akiteru Maeno, Ken-Ichi Nonomura

    2024.3 

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    Event date: 2024.3

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Genetic basis of the stem node-internode patterning in rice.

    Katsutoshi Tsuda

    THE 24th INTERNATIONAL CONFERENCE ON PLANT GROWTH SUBSTANCES 

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    Event date: 2023.7

    Language:English   Presentation type:Poster presentation  

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  • KNOX and YABBY transcription factors shape nodes and internodes of the stem in rice.

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    Event date: 2023.3

    Language:Japanese   Presentation type:Poster presentation  

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  • 【受賞講演】イネ科植物における茎形成機構の研究 Invited

    津田勝利

    第147回 日本育種学会 講演会  2025.3 

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  • 【受賞講演】茎の初期発生機構の研究 Invited

    津田勝利

    第66回 日本植物生理学会 年会  2025.3 

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  • Stem development and evolution: How nodes and internodes are formed? Invited

    TSUDA Katsutoshi

    40th IPSR International Symposium and 16th Symposium on Plant Stress Science  2025.3 

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  • YABBYと機能分化したKNOX1による茎の節・節間パターン形成 Invited

    津田勝利

    第2回独眼竜講話会  2024.7 

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  • Genetic basis of the stem node and internode patterning in rice II.

    Tsuda K., Maeno A., Hibara K.I., Tanaka W., Nonomura K.I.

    2023.9 

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  • Genetic basis of the stem node and internode patterning in rice.

    Katsutoshi Tsuda, Akiteru Maeno, Wakana Tanaka, Ken-ichi Nonomura

    2023.3 

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  • Development of a heatshock-inducible clonal analysis system and its application to observe internode initiation in rice.

    Katsutoshi Tsuda

    2022.9 

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  • Wild rice in National Institute of Genetics (Infrastructures of wild rice species for molecular genetics)

    2022.9 

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  • Utilization of wild rice genetic resources enabled by genome information and editing

    2022.3 

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  • Genetic analysis of panicle branching regulators from a rice ancestor, Oryza rufipogon.

    Katsutoshi Tsuda

    85th BSJ Sympodium “Inflorescence development and diversity in grasses”  2021.9 

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  • イネの花序構築を制御するBELL1型ホメオボックス遺伝子RIとRIL1の機能解析

    池田拓之, 田中若奈, 鳥羽大陽, 鈴木千絵, 前野哲輝, 津田勝利, 城石俊彦, 倉田哲也, 坂本智昭, 村井正之, 松坂弘明, 熊丸敏博, 平野博之

    第135回 日本育種学会 講演会  2019.3 

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  • Control of subcellular localization of a KNOX transcription factor in rice.

    Katsutoshi Tsuda, Ken-ichi Nonomura

    2019.3 

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  • BELL1型ホメオドメイン転写因子をコードするRIとRIL1遺伝子は花序構築とメリステムの維持を制御する

    IKEDA Takuyuki, TANAKA Wakana, TORIBA Taiyo, MAENO Akiteru, TSUDA Katsutoshi, SHIROISHI Toshihiko, KURATA Tetsuya, SAKAMOTO Tomoaki, MURAI Masayuki, MATSUSAKA Hiroaki, KUMAMARU Toshihiro, HIRANO Hiro-Yuki

    第60回 日本植物生理学会 年会  2019.3 

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  • Visualization of stem vascular networks using micro-CT scanning in maize

    2018.3 

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  • A role of KNOX-BLH transcription factors in scattered vein patterning in grasses

    2017.3 

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  • KNOTTED1 cofactors, BLH12 and BLH14, regulate internode patterning and vein anastomosis in maize.

    Katsutoshi Tsuda, Maria-Jazmin Abraham-Juarez, Akiteru Maeno, Zhaobin Dong, Dale Aromdee, Robert Meeley, Toshihiko Shiroishi, Ken-ichi Nonomura, Sarah Hake

    CSHA Latest Advances in Plant Development & Environmental Response, AWAJI, JAPAN  2016.11 

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  • Regulation of scattered venation and node/internode patterning in maize. Invited

    Katsutoshi Tsuda

    2016.10 

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  • Regulation of scattered venation and internode patterning in maize Invited

    Tsuda K, Dong Z, Abraham-Juarez M, Maeno A, Aromdee D, Meeley R, Shiroishi T, Nonomura K-I, Hake S

    日本植物学会 第80回大会 シンポジウム「植物の生き様を支える幹細胞のふるまい」  2016.9 

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  • Chromatin dynamics of the knotted1 locus during shoot development

    Katsutoshi Tsuda, Sarah Hake

    Plant Genome Stability and Change 2016  2016.7 

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  • Function of KNOTTED1 cofactors, the BEL1-like homeobox transcription factors in maize shoot development

    Katsutoshi Tsuda, Akiteru Maeno, Toshihiko Shiroishi, Ken-ichi Nonomura, Sarah Hake

    2016.3 

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  • Function of KNOX cofactors, the BEL1-like homeobox proteins in maize shoot meristems

    Tsuda, Katsutoshi, Hake, Sarah

    57th Annual Maize Genetics Conference  2015.3 

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  • Genome-wide study of KNOX regulatory network reveals brassinosteroid catabolism genes important for shoot meristem function in rice

    2014.3 

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  • Chromatin dynamics of the knotted1 locus during shoot development

    Katsutoshi Tsuda, Sarah Hake

    55th Annual Maize Genetics Conference  2013.3 

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  • 茎頂分裂組織の維持に必須なイネKNOX 遺伝子の正の自己制御

    津田勝利, 伊藤幸博, 佐藤豊, 倉田のり

    第53回 日本植物生理学会 年会  2012.3 

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  • イネにおけるKNOX遺伝子の自己制御

    津田 勝利, 伊藤 幸博, 佐藤 豊, 倉田 のり

    第52回 日本植物生理学会年会  2011.3 

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  • Positive Autoregulation of KNOX Genes in Rice

    Katsutoshi Tsuda

    The 2nd NIBB-MPIPZ Joint Symposium Plant Science Communications 2010  2010.11 

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  • Analysis of very long chain fatty acid (VLCFA) function during rice shoot development

    Katsutoshi Tsuda, Yukihiro Ito, Akio Miyao, Hirohiko Hirochika, Nori Kurata

    2008.10 

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  • Identification and analysis of rice mutants misexpressing KNOX genes in leaves

    Katsutoshi Tsuda, Yukihiro Ito, Akio Miyao, Hirohiko Hirochika, Nori Kurata

    XX INTERNATIONAL CONGRESS OF GENETICS 2008  2008.7 

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  • KNOX遺伝子を葉で異所的に発現するイネ突然変異体の解析①

    津田勝利, 伊藤幸博, 宮尾安藝雄, 廣近洋彦, 倉田のり

    第49回 日本植物生理学会年会  2008.3 

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  • KNOX遺伝子を葉で異所的に発現するイネ突然変異体の解析1

    津田勝利, 伊藤幸博, 宮尾安藝雄, 廣近洋彦, 倉田のり

    第112回 日本育種学会 講演会  2007.9 

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  • イネのKNOX遺伝子OSH1の発現制御機構の解析

    津田勝利, 伊藤幸博, 倉田のり

    日本遺伝学会 第79回大会  2007.9 

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Awards

  • 奨励賞

    2025.3   日本植物生理学会   茎の初期発⽣機構の研究

    津田勝利

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  • 奨励賞

    2025.3   日本育種学会   イネ科植物における茎形成機構の研究

    津田勝利

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  • 遺伝研インターン ベストインストラクター賞

    2024.7   国立遺伝学研究所  

    津田勝利

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  • 遺伝研インターン ベストインストラクター賞

    2023.7   国立遺伝学研究所  

    津田勝利

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  • 遺伝研インターン ベストインストラクター賞

    2016.7   国立遺伝学研究所  

    津田勝利

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  • 第129回講演会日本育種学会優秀発表賞

    2016.3   日本育種学会   トウモロコシ KNOTTED1 の共役因子 BEL1-like homeobox 転写因子のシュート形成における機能

    津田勝利

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Research Projects

  • 野生イネにおける花粉競争促進因子の研究

    Grant number:25H01831  2025.4 - 2027.3

    日本学術振興会  科学研究費助成事業 学術変革領域研究(A) 公募研究 

    津田 勝利

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    Authorship:Principal investigator 

    Grant amount:\11180000 ( Direct Cost: \8600000 、 Indirect Cost:\2580000 )

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  • 野生イネにおける花粉競争促進因子の研究

    Grant number:23H04754  2023.4 - 2025.3

    日本学術振興会  科学研究費助成事業 学術変革領域研究(A) 公募研究 

    津田 勝利

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    Grant amount:\10270000 ( Direct Cost: \7900000 、 Indirect Cost:\2370000 )

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  • 野生イネ独自の穂分子制御モジュールと繁殖戦略の研究

    Grant number:23K23584  2022.4 - 2026.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    津田 勝利

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    Grant amount:\16900000 ( Direct Cost: \13000000 、 Indirect Cost:\3900000 )

    花序の分枝は、栽培作物では収量に直結する形質であり、栽培イネは祖先の野生イネからの栽培化の過程で穂分枝数を増大させてきた。一方、野生イネは各々の繁殖戦略に応じて穂分枝を調節し種子への資源分配を制御することが知られているが、その遺伝的背景は不明である。本研究では、野生イネが持つ穂分枝抑制因子Uniaxial (Ux)と分枝促進因子Supressor of Uniaxial (Su)からなる野生イネ独自の制御モジュールの分子実体を解明する。また栽培・野生イネ集団内で、これらの遺伝子に生じた自然変異の分布と繁殖に関わる形質を調査し、生物学的意義を検証する。
    2022年度はSu責任遺伝子を同定するべく、Ux-O.rufipogon間のUx戻し交雑BC2F2、BC3F2世代の分離集団約5000個体を用いて連鎖解析をおこない、約100kbまで候補領域を絞り込んだ。候補領域内に存在する遺伝子について日本晴および親野生イネ系統のゲノム配列を比較したところ、野生イネで機能型と考えられる5遺伝子を同定した。これらの候補5遺伝子ついて、CRISPR/Cas9を用いたゲノム編集をおこない、機能欠損系統を作出した。これらは現在育成中である。
    また、野生稲の繁殖戦略とUx-Su経路の関連を明らかにするため、O.rufipogonをはじめとするAAゲノム種の野生イネ100系統について穂分枝・葯長などの形質を調査した。

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  • 野生イネ独自の穂分子制御モジュールと繁殖戦略の研究

    Grant number:22H02319  2022.4 - 2026.3

    日本学術振興会  科学研究費助成事業 基盤研究(B) 

    津田 勝利

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    Grant amount:\16900000 ( Direct Cost: \13000000 、 Indirect Cost:\3900000 )

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  • イネ介在分裂組織における幹細胞の検証と細胞未分化性制御機構の研究

    Grant number:20H04891  2020.4 - 2022.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

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    Authorship:Principal investigator 

    Grant amount:\10920000 ( Direct Cost: \8400000 、 Indirect Cost:\2520000 )

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  • 野生イネが独自に持つ穂分枝制御機構の研究

    2019.9 - 2020.3

    日本学術振興会  新学術領域「先端ゲノム支援」公募課題 

    津田勝利

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    Authorship:Principal investigator  Grant type:Competitive

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  • 野生イネが独自に持つ穂分枝制御機構の研究

    2019.4 - 2022.3

    日本学術振興会  基盤研究(C) 

    津田勝利

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  • イネの茎における節幹細胞の特徴付けと細胞未分化性制御機構

    2018.4 - 2020.3

    日本学術振興会  新学術領域「植物多能性幹細胞」公募課題 

    津田勝利

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  • イネ KNOX・BLH 転写因子複合体による SAM の維持機構の解明

    2016.4 - 2019.3

    日本学術振興会  若手研究(B) 

    津田勝利

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  • イネ発生メカニズムの解明に向けた細胞タイプ別 RNA 単離法の確立

    2015.10 - 2016.3

    日本学術振興会  研究活動スタート支援 

    津田勝利

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  • Towards establishment of the isolation method of nuclei from plant germ cells in early developmental stages

    Grant number:15K14630  2015.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    Nonomura Ken-ichi, TSUDA Katsutoshi, FUKAI Eigo

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid) 

    Grant amount:\3510000 ( Direct Cost: \2700000 、 Indirect Cost:\810000 )

    The gene expression pattern of plant germ cells is different from that of somatic cells in reproductive organs. To explore the difference, a special technique to distinguish and isolate specific cells or nuclei from reproductive somatic cells is required. This study aims to establish the method to enrich DNAs and RNAs from germ cells of rice reproductive organs, using the promoter of germ-cell specific rice gene MEL1 (MEL1p). We succeeded to mark germ cell-nuclei specifically with the fluorescent protein GFP in rice anthers, while the following steps for nuclei and DNA enrichment have required further consideration. For isolation of cell-type specific RNAs, the expression of the ribosomal protein-GFP fusion was toxic in transgenic plants, and then the experiments were canceled. The knowledge obtained in this study shows a possibility that further examinations of conditions will enable us to establish the method for isolation of specific cell-type nuclei from plant reproductive organs.

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  • Studies on RNA-mediated regulatory systems promoting plant meiosis

    Grant number:25252004  2013.4 - 2017.3

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

    Nonomura Kenichi, MIYAZAKI Saori, TSUDA Katsutoshi, KOMIYA Reina, LIU Hua, MIMURA Manaki, EIGUCHI Mitsugu, KUMU Rise, FURUYA Noriko, MAKINO Tomomi

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid) 

    Grant amount:\46280000 ( Direct Cost: \35600000 、 Indirect Cost:\10680000 )

    Meiosis is an important biological event that produces genetic diversity of eukaryotes. This project analyzed molecular functions of three rice proteins important for meiosis progression. MEL2 controls meiotic entry in rice. We identified the RNA consensus sequence that MEL2 preferentially bound in vitro, and predicted the genes under the control of MEL2. Next, the analyses of germline-specific Argonaute MEL1 and anther tapetum-specific transcription factor EAT1 revealed possibilities that small RNAs regulated male meiosis non-cell autonomously, and triggered chromosome remodeling in male meiocytes. These findings unveiled that RNA-mediated epigenetic regulatory mechanisms play essential roles in progression of plant meiosis.

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  • 植物の発生に伴うknotted1遺伝子座のクロマチン動態の解析

    2013.4 - 2015.3

    日本学術振興会  海外特別研究員 

    津田勝利

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  • イネのKNOX遺伝子OSH1のターゲット遺伝子の同定とSAMの維持機構の解明

    Grant number:10J01871  2010.4 - 2012.3

    日本学術振興会  特別研究員 DC2  特別研究員奨励費

    津田勝利

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    植物の成長点である茎頂分裂組織(Shoot Apical Meristem、以下SAM)は、自らを未分化な状態に維持しつつ、一生を通じて次々と葉や茎・花などの器官を生み出す、いわば植物の形づくりの中心である。SAMの維持に必須な転写因子であるイネのKNOX遺伝子の一つ、OSH1の直接のターゲット遺伝子を網羅的に同定し、SAMの維持メカニ」ズムを明らかにするために以下の研究を行った。
    (1)昨年度発見したSAMの維持に不可欠なOSH1の自己制御機構について、論文で発表した。
    (2)ChIP-seq法により同定した約30,000のOSH1結合領域のうち、統計学的に有意なものを絞り込むため、MACSによるin silico解析をおこない、信頼度の高い結合領域を4,978個に絞り込んだ。
    (3)これら結合領域の近傍に位置する遺伝子を直接の標的遺伝子と定義し、4,178遺伝子を同定した。
    (4)これら標的遺伝子の多くは、発生関連の転写因子や、植物ホルモンであるオーキシン・ブラシノステロイド・ジベレリンの生合成/シグナル伝達経路の遺伝子であった。
    (5)OSH1結合領域の各遺伝子に対する相対的な位置を調べたところ、大部分が転写開始点および終了点付近に存在することが明らかになった。
    (6)OSH1結合領域のDNA配列データから共通して存在するDNA配列モチーフをMEMEにより検索した結果、G/TGAT/CGG/TGACというモチーフが全OSH1結合領域中の90%以上に存在することがわかった。
    ((2)~(6)のデータ解析はカリフォルニア大学Sarah Hake研究室にて手法を学んでおこなった。)
    本研究により、植物ホルモンであるオーキシンやブラシノステロイド、および転写因子とのクロストークが明らかになったことは今後の植物発生学の研究において重要な知見となると考えられる。

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Teaching Experience

  • 生命ナノシステム科学総論「海外留学のすすめ」

    2025.5 Institution:Yokohama City University

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  • 2022年 発生生物学 II

    2022.11 Institution:総合研究大学院大学

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  • 2018年 発生生物学IV

    2018.11 Institution:総合研究大学院大学

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  • 2016年 発生生物学II

    2016.11 Institution:総合研究大学院大学

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  • 2015年 第15回生産・環境生物学特別講義

    2015.12 Institution:東京大学大学院農学生命科学研究科

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Social Activities

  • 夏休み子ども遺伝学講座「キイロショウジョウバエで学ぶ遺伝の法則とPCR」

    Role(s): Advisor, Organizing member

    2024.7

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  • 夏休み子ども遺伝学講座「植物はどうやって成長するの?」

    Role(s): Advisor, Organizing member

    三島市  2023.7

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    Type:Science cafe

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  • 中学生職業体験学習「イネの葉っぱでDNA 診断をしてみよう!」

    Role(s): Lecturer

    2019.11

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  • 中学生職業体験学習「イネの葉っぱで DNA 診断をしてみよう!」

    Role(s): Lecturer

    2018.10

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    Type:Other

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  • 夏休みこども遺伝学教室「お米が実るようすを観察しよう!」

    Role(s): Advisor, Organizing member

    2017.8

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    Type:Other

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Media Coverage

  • イネの茎が鍵握る 新たな「緑の革命」に期待 Newspaper, magazine

    東京新聞・中日新聞  10面およびWeb版 (https://www.tokyo-np.co.jp/article/354327)  2024.9

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  • 植物の茎形成の仕組み Newspaper, magazine

    日本経済新聞  17面およびWeb版 (https://www.nikkei.com/article/DGXZQOSG145D80U4A610C2000000/)  2024.7

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  • イネの節と節間、区分け解明=背丈調節に応用期待―遺伝研 Internet

    時事通信  https://sp.m.jiji.com/article/show/3260650  2024.6

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    Author:Other 

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  • 植物の茎ができるしくみを解明 Internet

    中国新聞デジタル  https://www.chugoku-np.co.jp/articles/-/479662  2024.6

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  • 茎発生の仕組み解明 三島・遺伝研など 農作物改良に期待 Newspaper, magazine

    静岡新聞  27面およびWeb版 (https://news.at-s.com/article/1491308?lbl=10346)  2024.6

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    Author:Other 

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Academic Activities

  • 日本植物学会 第85回 シンポジウム"Inflorescence development and diversity in grasses"

    Role(s): Planning, management, etc.

    津田勝利・佐久間俊・田中若奈  2021.9

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    Type:Competition, symposium, etc. 

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