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Molecular basis of plant disease resistance to sheath blight

Research Project

Project/Area Number 18K14469
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 39040:Plant protection science-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Kouzai Yusuke  国立研究開発法人理化学研究所, 環境資源科学研究センター, 研究員 (50783502)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords病害抵抗性 / 紋枯病 / イネ科植物 / サリチル酸 / トランスクリプトーム / ミナトカモジグサ / アシベンゾラルSメチル / イネ
Outline of Final Research Achievements

Sheath blight, caused by Rhizoctonia solani, is a major disease in grass plants. We previously identified that the phytohormone salicylic acid (SA) induces R. solani resistance in grass plants. Here, we aimed to reveal the molecular basis of the SA-dependent R. solani resistance through a combinatorial approach of genetics and transcriptomics. Benzothiadiazole, a functional analog of SA, did not work as a simple mimic of SA in Brachypodium, and thus it may cause unfavorable side effects on R. solani resistance through its specific transcriptional alteration. A time-series comparative transcriptome analysis of Brachypodium accessions during R. solani infection revealed that R. solani-resistant accessions activated WRKY transcription factor-dependent immunity faster than susceptible accessions. We also illuminated that BdWRKY38 may positively regulate the accession-specific R. solani resistance by mediating the SA signaling pathway in Brachypodium.

Academic Significance and Societal Importance of the Research Achievements

紋枯病はイネ科植物の重要病害であるが、抵抗性の品種や系統が同定されていなかったことから植物側の抵抗性機構は不明であった。本研究により、ミナトカモジグサの系統特異的な紋枯病抵抗性は、植物ホルモンであるサリチル酸依存的であり、その実体はWRKY転写因子が制御する免疫応答の速やかな活性化であることを明らかにした。これらの現象は非親和性病原菌に対する宿主植物の応答性と類似しており、広範な宿主域を持つ殺生菌である紋枯病菌に対しても非親和性の抵抗性反応が起こりえることを示唆する。本研究は、殺生菌に対する植物免疫システムの基礎的知見を拡大し、防除策開発に向けて近縁種を利用した抵抗性遺伝資源の探索を促進する。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Journal Article] Benzothiadiazole, a plant defense inducer, negatively regulates sheath blight resistance in Brachypodium distachyon2018

    • Author(s)
      Kouzai Yusuke、Noutoshi Yoshiteru、Inoue Komaki、Shimizu Minami、Onda Yoshihiko、Mochida Keiichi
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1 Pages: 17358-17358

    • DOI

      10.1038/s41598-018-35790-w

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 微生物分子パターンに対するミナトカモジグサの活性酸素種生成特性の解析2019

    • Author(s)
      小笠原翼、松井英譲、山本幹博、一瀬勇規、豊田和弘、香西雄介、能年義輝
    • Organizer
      平成31年度日本植物病理学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Rapid activation of WRKY-dependent immunity facilitates native resistance against the sheath blight pathogen, Rhizoctonia solani, in Brachypodium distachyon2019

    • Author(s)
      Yusuke Kouzai
    • Organizer
      4th International Brachypodium Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Time-series transcriptome analysis of Brachypodium distachyon in response to infection by Rhizoctonia solani2019

    • Author(s)
      Yusuke Kouzai, Komaki Inoue, Minami Shimizu, Yukiko Uehara-Yamaguchi, Kotaro Takahagi, Yoshiteru Noutoshi, Keiichi Mochida
    • Organizer
      2019 IS-MPMI XVIII CONGRESS
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characterization of expression profiles of effector genes of Rhizoctonia solani on Brachypodium distachyon2019

    • Author(s)
      Sobhy S. H. Abdelsalam, Satoshi Isoya, Megumi Watanabe, Yusuke Kouzai, Hidenori Matsui, Mikihiro Yamamoto, Yuki Ichinose, Kazuhiro Toyoda, Seiji Tsuge, Yoshiteru Noutoshi
    • Organizer
      2019 IS-MPMI XVIII CONGRESS
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ミナトカモジグサを用いたイネ紋枯病の研究2019

    • Author(s)
      香西雄介
    • Organizer
      日本植物病理学会関東部会第14回若手の会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 紋枯病菌感染過程におけるミナトカモジグサの 時系列比較トランスクリプトーム解析2019

    • Author(s)
      香西雄介、井上小慎、清水みなみ、高萩航太郎、能年義輝、持田恵一
    • Organizer
      平成31年度日本植物病理学会大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 紋枯病に対するイネ科植物の免疫機構2018

    • Author(s)
      香西雄介
    • Organizer
      第13回ムギ類研究会
    • Related Report
      2018 Research-status Report
    • Invited

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Published: 2018-04-23   Modified: 2021-02-19  

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