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Cost of pollination: Microbes on the flowers and their effects on plant reproduction

Research Project

Project/Area Number 19K22455
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 45:Biology at organismal to population levels and anthropology, and related fields
Research InstitutionKyoto University

Principal Investigator

Sakai Shoko  京都大学, 生態学研究センター, 教授 (30361306)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords送粉 / 真菌 / 細菌 / 植物繁殖生態学 / 細菌叢 / 訪花者
Outline of Research at the Start

自ら移動できない植物は、花蜜や花粉で動物を誘引し送粉(花粉の授受)に利用する。この植物と送粉者の関係は、異なる生物種が互いに利益を与える相利共生のモデル系として盛んに研究されてきたが、送粉者の訪花が植物に与えるコストにはほとんど目が向けられてこなかった。
送粉者が潜在的にもたらしうる負の影響の一つに、微生物への感染がある。そこで本研究では、①送粉過程において花に感染する微生物叢を明らかにする、②空気感染と送粉者を介した感染の相対的重要性を明らかにする、③微生物が植物の繁殖に影響を与えることを示すことを目指す。

Outline of Final Research Achievements

In pollination ecology, flowers have been studied mainly concerning pollinators, which deliver pollen from flower to flower, while interactions with other organisms have not received much attention. Recently, however, it has become clear that pollinators bring not only pollen but also many microorganisms to the flower. The effects of these microorganisms on plant reproduction are largely unknown. This study investigated the possibility that these microorganisms might affect reproduction by identifying floral microbiomes and conducting field experiments. We found that pathogenic bacteria and/or their close relatives are present in the flowers. When they colonize flowers, they can have negative effects on fruit production and result in systemic infection. The results suggest that microorganisms have influenced the evolution of floral traits and plant reproductive systems.

Academic Significance and Societal Importance of the Research Achievements

植物上には、地下部ばかりでなく地上部にも、さまざまな微生物が存在し、植物の生存、成長や繁殖にさまざまな影響を与えうることがわかってきた。本研究では、野生植物において、花の上の微生物が繁殖に影響を与えうること、それらの微生物の一部は送粉者によって花にもたらされることを示した。この結果は、植物と相利共生の関係にある送粉者が植物に負の影響をもたらしうることを示し、送粉生態学に大きな影響を与える。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] Westphalian Wilhelms‐University Munster(ドイツ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] University of Liverpool(英国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] マレーシア農業大学/マレーシア農業研究局(マレーシア)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Green greenhouse: leaf enclosure for fruit development of an androdioecious vine, Schizopepon bryoniifolius2020

    • Author(s)
      Nagaoka Nobuyuki、Naoe Shoji、Takano-Masuya Yu、Sakai Shoko
    • Journal Title

      Proceedings of the Royal Society B: Biological Sciences

      Volume: 287 Issue: 1936 Pages: 1-8

    • DOI

      10.1098/rspb.2020.1718

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evolutionary stability of plant?pollinator networks: efficient communities and a pollination dilemma2020

    • Author(s)
      Metelmann Soeren、Sakai Shoko、Kondoh Michio、Telschow Arndt
    • Journal Title

      Ecology Letters

      Volume: 23 Issue: 12 Pages: 1747-1755

    • DOI

      10.1111/ele.13588

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Microbial diversity of a dioecious plant Mallotus japonicus2021

    • Author(s)
      Maxime MARRE, Masayuki USHIO, Shoko SAKAI
    • Organizer
      日本生態学会第68回全国大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Microbes on flowers and pollination2020

    • Author(s)
      Shoko SAKAI
    • Organizer
      The symposium "Sex and Ecological Communities". Joint meeting of The 3rd Annual Meeting of The eDNA Society and The 36th Annual Meeting of the Society of Population Ecology
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] アカメガシワ細菌斑点病の花器感染2020

    • Author(s)
      酒井章子 ・Marre Maxime ・潮 雅之
    • Organizer
      植物病理学会関西部会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Contrasting microbiomes of male and female flowers of Mallotus japonicus2020

    • Author(s)
      Maxime MARRE, Masayuki USHIO, Shoko SAKAI
    • Organizer
      日本生態学会第67回全国大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Different pathways for specialization under pollination dilemma2019

    • Author(s)
      Shoko SAKAI
    • Organizer
      The 43rd New Phytologist Symposium Interaction networks and trait evolution
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 需要―供給バランスに依存する花と昆虫の取引のネットワークを解明

    • URL

      https://www.kyoto-u.ac.jp/ja/research-news/2020-08-24

    • Related Report
      2020 Annual Research Report

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Published: 2019-07-04   Modified: 2022-01-27  

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