Chemical communication between rice and barnyard grass

• Project/Area Number: 16K07574
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Crop production science
• Research Institution: Kagawa University
• Principal Investigator: Kato-Noguchi Hisashi 香川大学, 農学部, 教授 (50222196)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: アレロパシー / イネ / イヌビエ / ケミカルコミュニケーション / 根滲出物 / 雑草科学

Outline of Final Research Achievements

Allelopathic activity of rice seedlings exhibited 5.3- to 6.3-fold increases when rice and barnyard grass seedlings were grown together. Momilactone B concentration in rice seedlings incubated with barnyard grass seedlings was 6.9-fold greater than that in rice seedlings incubated independently. Root exudates of barnyard grass seedlings increased allelopathic activity and momilactone B concentration in rice seedlings. Therefore, barnyard grass-induced allelopathic activity of rice seedlings may be caused by the components in barnyard grass root exudates. The root exudates of barnyard grass were then purified by several choromatographic runs with monitoring the momilactones-induced activity and an active substance was isolated. The chemical structures of the substances were determined by spectral data to be monocerin. These results suggest that monocerin may contribute to the barnyard grass-induced allelopathic activity of rice seedlings.

Academic Significance and Societal Importance of the Research Achievements

モノセリンは糸状菌(Exserohilum monoceras (Drechsler) Leonard & Suggs)の生産物として初めて報告された．日本ではモノセリンを主成分としたアミノ酸生合成阻害型除草剤の開発が試みられた．さらに，モノセリンを生産するE. monocerasを用いた微生物除草剤の有効性が認められている．これまでにモノセリンは菌類のみから単離されているが，本研究においてモノセリンは初めてイヌビエの水耕栽培液から単離された．今後さらにこの物質の生態学的役割について検討する必要があると考えられる．

Research Products

• [Journal Article] Relationship between allelopathic effects and functional traits of different allelopathic potential rice accessions at different growth stages. (2018)
  • Author(s): 1.Gaofeng, X., Shicai, S., Fudou, Z., Yun Z., Kato-Noguchi, H. David, R.C.:
  • Journal Title: Rice Science Volume: 25 Issue: 1 Pages: 32-41
  • DOI: 10.1016/j.rsci.2017.09.001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] イネの根からのアレロパシー物質モミラクトンの分泌 (2016)
  • Author(s): 加藤尚
  • Journal Title: 根の研究 Volume: 25 Pages: 5-13
  • NAID: 130005138833
  • Peer Reviewed / Open Access
• [Presentation] Allelopathy and interaction of a momilactone deficient rice mutant with barnyardgrass. (2018)
  • Author(s): Kato-Noguchi, H.:
  • Organizer: 18th European Weed Research Society Symposium
  • Int'l Joint Research / Invited
• [Presentation] Rice production systems in Japan. (2018)
  • Author(s): Kato-Noguchi, H.:
  • Organizer: International Canakkale Rice Workshop.
  • Int'l Joint Research / Invited
• [Presentation] Allelopathy for eco-friendly rice cultivation. (2018)
  • Author(s): Kato-Noguchi, H.:
  • Organizer: International Canakkale Rice Workshop.
  • Int'l Joint Research / Invited
• [Presentation] Rice allelopathy for eco-friendly agriculture (2017)
  • Author(s): Kato-Noguchi, H., Salam, M.A. and Takeshi Ino, T.:
  • Organizer: International Symposium on Eco- Efficiency in Agriculture and Applied Research.
  • Place of Presentation: BCKV, West Bengal, India,
  • Year and Date: 2017-01-20
  • Int'l Joint Research / Invited
• [Presentation] An allelopathic interaction between barnyardgrass and momilactone deficient mutant of rice (2017)
  • Author(s): Kato-Noguchi, H.
  • Organizer: The 8th World Congress of Allelopathy.
  • Int'l Joint Research / Invited
• [Presentation] イヌビエの葉茎に含まれるアレロパシー物質の探索 (2017)
  • Author(s): 田中花奈・加藤尚
  • Organizer: 日本雑草学会
• [Presentation] Allelopathic activity and a growth inhibitory substance in shoots of Echinochloa crus-galli (L.) P. Beauv. (2017)
  • Author(s): Tanaka, K. and Kato-Noguchi, H.
  • Organizer: he 26th Asian-Pacific Weed Science Society Conference,
• [Presentation] Mode of action of rice allelochemical momilactone. (2016)
  • Author(s): Kato-Noguchi, H., Itaya, T. and Tada, Y.
  • Organizer: The 7th International Weed Science Congress
  • Place of Presentation: Prague, Czech Republic
  • Year and Date: 2016-06-19
  • Int'l Joint Research / Invited
• [Book] Weed Management in Rice in the Asian-Pacific Resion. (2017)
  • Author(s): Kato-Noguchi, H.
  • Publisher: Asian-Pacific Weed Science Society,