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Innovative screening of plant resistance inducers based on insect symbiotic microorganisms

Research Project

Project/Area Number 20F20103
Research Category

Grant-in-Aid for JSPS Fellows

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

Principal Investigator

Ivan Galis  岡山大学, 資源植物科学研究所, 教授 (90360502)

Co-Investigator(Kenkyū-buntansha) WARI DAVID  岡山大学, 資源植物科学研究所, 外国人特別研究員
Project Period (FY) 2020-09-25 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2022: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2021: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2020: ¥400,000 (Direct Cost: ¥400,000)
Keywordsbrown planthopper / biological control / microbes / rice / microbial symbiont / rice brown planthopper / defense
Outline of Research at the Start

Symbiotic microorganisms associate with insect pests like brown planthopper (Nilaparvata lugens) where they serve various beneficial functions. Some of these microorganisms are also detected by rice to trigger plant defense responses. In this project, we examine the possibility of use of insect microbes for priming of defenses in rice, implemented as a new crop protection strategy in the integrated pest management (IPM).

Outline of Annual Research Achievements

This research opened many new areas of knowledge that help us to better understand the role of pest associated microbial symbionts in pest performance and host plant defense. The main current conclusions of our research allow us to propose that brown planthopper honeydew indeed contains a complex mixture of microorganisms that signal the presence and/or identity of insect invader to rice plant. However, although some signals help to activate rice defense, such as 7-113 strain, others can actually counteract plant defense, such as 6-22. It suggests that enforcing the positive regulators of defense could be used to tip the balance towards the strong defense, and the use of strains such as 7-113 could be useful for improvement of rice defense during growth, which could yield similar effects as well-known Trichoderma biocontrol agent that is currently used in plant protection. In addition, this approach is cost effective and applicable in developing countries where the access to insecticides might be very limited. Because 6-22 strain boosts salicylate signaling used by plants against pathogens, we also hope to investigate antimicrobial properties of 6-22 application.

Research Progress Status

令和4年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和4年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (6 results)

All 2022 2021

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Integrated view of plant metabolic defense with particular focus on chewing herbivores2022

    • Author(s)
      Wari David、Aboshi Takako、Shinya Tomonori、Galis Ivan
    • Journal Title

      Journal of Integrative Plant Biology

      Volume: 64 Issue: 2 Pages: 449-475

    • DOI

      10.1111/jipb.13204

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Characterization of honeydew-associated microbes of brown planthoppers and their role in rice defense2022

    • Author(s)
      David Wari, Yuko Hojo, Akio Tani, Tomonori Shinya, Ivan Galis
    • Organizer
      The 3rd Joint Meeting of International Society of Chemical Ecology (ISCE) and the Asia-Pacific Association of Chemical Ecologists (APACE)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characterization of honeydew-associated microbes of brown planthoppers and their role in rice defense2022

    • Author(s)
      David Wari, Yuko Hojo, Akio Tani, Tomonori Shinya, Ivan Galis
    • Organizer
      The 63rd Annual Meeting of the Japanese Society of Plant Physiology
    • Related Report
      2022 Annual Research Report
  • [Presentation] Supplementing Nesidiocoris tenuis with a factitious diet of Artemia cysts to control Bemisia tabaci on tomato plants; a field approach2022

    • Author(s)
      David Wari, Motonori Takagi, Takeshi Saito, Toshiyuki Tezuka, Kubota Naoya, Shinsuke Sato, Takashi Ogawara
    • Organizer
      The 66th Japanese Society of Applied Entomology and Zoology
    • Related Report
      2022 Annual Research Report
  • [Presentation] Characterization of honeydew-associated microbes of brown planthoppers and their role in rice defense2022

    • Author(s)
      David Wari, Yuko Hojo, Akio Tani, Tomonori Shinya, Ivan Galis
    • Organizer
      63nd Annual Meeting of the Japanese Society
    • Related Report
      2021 Annual Research Report
  • [Presentation] Brown planthopper honeydew-associated microbes induce defense response in rice2021

    • Author(s)
      David Wari, Yuko Hojo, Tomonori Shinya & Ivan Galis
    • Organizer
      The 62nd Annual Meeting of the Japanese Society of Plant Physiology in Matsue
    • Related Report
      2020 Annual Research Report

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Published: 2020-09-29   Modified: 2024-03-26  

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