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Elucidation of chromatin states regulating parasitism in plant pathogenic filamentous fungi.

Research Project

Project/Area Number 21H02195
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 InstitutionKobe University

Principal Investigator

NAKAYASHIKI HITOSHI  神戸大学, 農学研究科, 教授 (50252804)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2023: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2022: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2021: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Keywordsいもち病菌 / エピジェネティクス / ゲノム進化 / ヒストン修飾
Outline of Research at the Start

植物病原菌は、宿主の「寄生者」であるが、多くの場合、枯葉のような植物遺体を利用して「腐生的」に生育することもできる。本研究では、この病原菌の「寄生」と「腐生」の二つのモードがどのように制御されているか解き明かすことを目的としている。近年、同じ遺伝子を持つ細胞が、異なった機能を持つようになる機構として、ヒストン修飾やDNAのメチル化など、DNAの配列情報を変えずに、遺伝子の働きを調節するエピジェネティクスという機構が注目されている。本研究では、イネ科植物いもち病菌を材料に「寄生」と「腐生」のモード変換にエピジェネティックな制御が関与していると考え、その機構の謎に迫る。

Outline of Final Research Achievements

The blast fungus, Pyricularia oryzae, has both saprophytic and parasitic lifestyles as a plant pathogen. In this study, we investigated epigenetic chromatin changes in as a mechanism for switching between these "parasitic" and "saprophytic" lifestyles. Our findings reveal that the P. oryzae genome contains genes that facilitate parasitism, including potentially horizontally transferred genes that are localized to specific genomic regions that are primarily regulated by H3K27me3. In addition, genes necessary for parasitism are also found in euchromatic regions, which consist of highly conserved genes and are mainly regulated by H3K4me2/3.

Academic Significance and Societal Importance of the Research Achievements

いもち病菌は、コメを主食とする我が国の稲作にとって、最大の脅威となる植物病害であり、その安定的な防除法の確立は、喫緊の課題である。本研究は、腐生的に生きていくことができる本菌が、どのようにして寄生的な生活環を獲得したのか、またそれに伴う遺伝子制御とはどのようなものかを明らかにしたものであり、いもち病菌を防除するための新たな戦略や殺菌剤の開発等に有用な知見であると考えられる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (6 results)

All 2023 2022 Other

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

  • [Int'l Joint Research] Academia Sinica(中国)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Horizontally Transferred DNA in the Genome of the Fungus <i>Pyricularia oryzae</i> is Associated With Repressive Histone Modifications2023

    • Author(s)
      Kobayashi Natsuki、Dang Thach An、Pham Kieu Thi Minh、G?mez Luciano Luis B、Van Vu Ba、Izumitsu Kosuke、Shimizu Motoki、Ikeda Ken-ichi、Li Wen-Hsiung、Nakayashiki Hitoshi
    • Journal Title

      Molecular Biology and Evolution

      Volume: 40 Issue: 9

    • DOI

      10.1093/molbev/msad186

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Studies on the roles of epigenetics in the pathogenicity of Pyricularia oryzae2023

    • Author(s)
      Nakayashiki Hitoshi
    • Journal Title

      Journal of General Plant Pathology

      Volume: 89 Issue: 6 Pages: 361-364

    • DOI

      10.1007/s10327-023-01140-6

    • Related Report
      2023 Annual Research Report
  • [Journal Article] MoSET1-dependent transcription factors regulate different stages of infection-related morphogenesis in Pyricularia oryzae2023

    • Author(s)
      Dang Ngoc Minh , Yusaku Tsukahara , Dang An Thach , Ken-ich Ikeda , Hitoshi Nakayashiki
    • Journal Title

      Journal of General Plant Pathology

      Volume: 89 Issue: 2 Pages: 77-83

    • DOI

      10.1007/s10327-022-01111-3

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] いもち病菌のゲノム進化における遺伝子水平移行のインパクト2022

    • Author(s)
      小林奈月・Thach An Dang・池田健一・中屋敷均
    • Organizer
      平成4年度日本植物病理学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] イネ科植物いもち病菌における抑制的ヒストン修飾H3K9me3とH3K27me3による遺伝子発現制御2022

    • Author(s)
      小林奈月・Thach An Dang・Pham Thi Minh Kieu・池田健一・中屋敷均
    • Organizer
      平成4年度日本植物病理学会大会
    • Related Report
      2022 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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