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Elucidation of coordinated regulation mechanism of cytochrome P450 genes: key genes for multiple-herbicide resistance in Echinochloa phyllopogon

Research Project

Project/Area Number 19H02955
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 39040:Plant protection science-related
Research InstitutionKyoto University

Principal Investigator

Iwakami Satoshi  京都大学, 農学研究科, 助教 (00761107)

Co-Investigator(Kenkyū-buntansha) 赤木 剛士  岡山大学, 環境生命科学学域, 研究教授 (50611919)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2021: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2020: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
KeywordsP450 / 除草剤 / 雑草 / タイヌビエ / 抵抗性 / ゲノム / 新規ゲノム解読 / 多剤抵抗性 / 解毒型抵抗性 / 除草剤抵抗性 / 除草剤代謝 / 解毒代謝 / 共発現解析
Outline of Research at the Start

雑草の除草剤抵抗性では、多くの除草剤に対する抵抗性(多剤抵抗性)が世界的な脅威となっており、そのメカニズムとして除草剤の解毒代謝能の向上があげられる。研究代表者らは強害雑草タイヌビエの多剤抵抗性を解析し、多様な除草剤を解毒代謝する酵素遺伝子の活性化が多剤抵抗性を引き起こすことを明らかにしてきた。本研究では、酵素遺伝子活性化を引き起こすメカニズムを解明する。

Outline of Final Research Achievements

We analyzed the resistance mechanism of Echinochloa phyllopogon, a paddy field weed that has acquired resistance to various herbicides by simultaneously overexpressing enzymes that detoxify herbicides, and clarified the followings: (1) The genome of the multiple-herbicide resistant line was sequenced and highly contiguous genome was obtained. Genetic analysis using the genome revealed that the multiple-herbicide resistance was caused by a single region of the genome. (2) We have selected one E. phyllopogon line that produces callus with excellent culture characteristics. This line will be a valuable resource for the establishment of E. phyllopogon transformation system. (3) Resistance to the VLCFAE inhibitor thiobencarb was independent of resistance to many other herbicides.

Academic Significance and Societal Importance of the Research Achievements

雑草の除草剤抵抗性の中でも解毒代謝型の抵抗性を獲得した雑草は、多様な除草剤に抵抗性を示すことが多く、その被害が世界的に強く懸念されている。これらの抵抗性雑草の防除や、抵抗性の進化を抑制するためには、抵抗性機構の解明が求められているが、詳細についてはあらゆる雑草で明らかにされていない。本研究では、メカニズム解析が他の雑草に比べて先行している水田の大型雑草タイヌビエの多剤抵抗性を材料に、多剤抵抗性が1つの変異によって生じた可能性を示すとともに、抵抗性機構解明にむけた実験系の構築を進めた。本研究の進展により、抵抗性機構が解明されれば、抵抗性雑草の防除において重要な知見がもたらされると考えられる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (4 results)

All 2022 2020 2019

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results) Presentation (2 results)

  • [Journal Article] Thiobencarb resistance mechanism is distinct from CYP81A-based cross-resistance in late watergrass (<i>Echinochloa phyllopogon</i>)2022

    • Author(s)
      Dimaano Nina Gracel、Tominaga Tohru、Iwakami Satoshi
    • Journal Title

      Weed Science

      Volume: 70 Issue: 2 Pages: 160-166

    • DOI

      10.1017/wsc.2022.4

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cytochrome <scp>P450</scp> ‐mediated herbicide metabolism in plants: current understanding and prospects2020

    • Author(s)
      Dimaano Nina Gracel、Iwakami Satoshi
    • Journal Title

      Pest Management Science

      Volume: 77 Issue: 1 Pages: 22-32

    • DOI

      10.1002/ps.6040

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] タイヌビエにおいて多剤抵抗性発現をもたらすゲノム領域の探索2022

    • Author(s)
      杉浦快・福西詩奏・冨永達・岩上哲史
    • Organizer
      日本雑草学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 共発現解析による水田雑草タイヌビエにおける除草剤解毒代謝シトクロムP450の発現制御因子の探索2019

    • Author(s)
      福西詩奏・赤木剛士・保田謙太郎・冨永達・岩上哲史
    • Organizer
      第二回植物インフォマティクス 研究会
    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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