Damage control of root parasitic weeds by bioactiphore preventing parasitism isolated from plants and basidiomycetes.

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K05864
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 38040:Bioorganic chemistry-related
• Research Institution: Tottori University
• Principal Investigator: Ueno Kotomi 鳥取大学, 農学部, 准教授 (40582028)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 根寄生雑草 / 担子菌類抽出物 / 幼根伸長阻害

Outline of Final Research Achievements

Witchweeds (Striga spp.) and broomrapes (Orobanche and Phelipanche spp.) cause reduction of the yield of crops by parasitizing the root of grains and leguminous crops. To prevent parasitizing of these weeds using chemicals, inhibitors on radicle elongation of Orobanche minor were searched from extracts of cultured basidiomycetes. Extracts of liquid culture filtrate of 97 basidiomycetes were subjected to screening and five species were selected. These basidiomycetes were cultured in large quantities, and six known compounds and nine new compounds were isolated and identified. Several compounds effectively inhibited radicle elongation of O. minor, suggesting that these inhibitors could be new types of regulators to suppress root parasitic weed damage.

Free Research Field

生物有機化学

Academic Significance and Societal Importance of the Research Achievements

根寄生雑草に対して、これまでは種子発芽を誘導する物質で寄生被害を軽減しようと研究が進められてきたが、実用化には至っていない。しかし本研究では発芽後の種子を標的とし、幼根伸長を阻害することで宿主への到達を妨げ、寄生被害を押さえるような物質の単離と同定に成功した。このような化合物の報告はまだ少なく、また比較的小さな分子であったことから、今後は構造改変などでより効果的かつ実用可能な物質の開発に繋がると考えられる。