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Ecophysiological and genetic study on effects of arbuscular mycorrhiza on rice growth

Research Project

Project/Area Number 20K05995
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 39020:Crop production science-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kamoshita Akihiko  東京大学, 大学院農学生命科学研究科(農学部), 准教授 (10323487)

Co-Investigator(Kenkyū-buntansha) 津釜 大侑  東京大学, 大学院農学生命科学研究科(農学部), 准教授 (10726061)
大友 量  国立研究開発法人農業・食品産業技術総合研究機構, 農業環境研究部門, 上級研究員 (80355081)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsイネ / 菌根菌 / 水条件 / 品種間差 / 接種 / 感染率 / 菌叢 / トウジンビエ / 共生 / 乾燥 / 根系 / 接種試験 / ストレス / 水 / 品種
Outline of Research at the Start

イネとアーバスキュラー菌根菌(AM菌)の共生について、第1に、AM菌のイネへの感染による共生系の形成と作物生産性が、培地の水分の変化によって変わりうる仕組みを、分子レベルから組織・個体・群落レベルで明らかにする。節水栽培・乾燥ストレスに対して、共生系が適応性・抵抗性を発揮することを検証する。第2に、イネの根の形態・内部構造、水分適応性に関する諸形質の遺伝的変異と、AM菌との共生関係について、明らかにする。根中心柱の太い準同質遺伝子系統、水稲と陸稲品種、日本在来種コアコレクションを用いて、幼植物検定と圃場試験により、分子・組織・個体・群落レベルでAM菌のイネへの影響を明らかにする。

Outline of Final Research Achievements

We investigated the symbiosis between rice and arbuscular mycorrhizal (AM) fungi, focusing on water regimes and rice varietal differences. We clarified the infection rate of roots by AM fungi, AM fungal community composition, and their impact on crop growth. Higher irrigation under upland fields enhanced 2 Operational Taxonomic Units (OTU) in AM fungi, whereas drought conditions enhanced Claroideoglomus in pearl millet (a reference crop) but not in rice. The infection rate remained relatively stable across upland water regimes. In the deep soil layers, the proportion of the genus Rhizophagus was high, and the infection rate was higher than in the shallow layers. Among various 64 rice varieties, the higher infection rate was associated with a higher biomass distribution to roots. Higher infection rate in a variety Kinandang Patong was clarified through its root thickness and characteristics of lateral roots. Pearl millet responded to AM fungi greater than rice.

Academic Significance and Societal Importance of the Research Achievements

AM菌の接種効果、土着菌の動態、品種間差異、水環境への応答について、イネに関する基礎的な知見を得、さらにより乾燥適応性の高いトウジンビエとも比較をした。気候変動の悪化への懸念が増大する社会状況にあって、農業分野でも二酸化炭素排出の少ない生産システムの設計が求められている。化学肥料の投入量を減らしながら、作物生産の養分管理を行う1つの方法として、本研究成果をさらに発展させてゆき、農業生態系の中で活用できる技術へと応用してゆくことが期待される。圃場を主にした実験系で、イネのAM菌の水環境条件への応答と、品種間差に関して、学術的に重要な知見を示した。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (14 results)

All 2023 2022 2021 Other

All Int'l Joint Research (3 results) Presentation (10 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Remarks (1 results)

  • [Int'l Joint Research] タミルナードゥ農業大学(インド)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] タミルナードゥ農業大学(インド)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] 国際半乾燥熱帯作物研究所/タミルナードゥ農業大学(インド)

    • Related Report
      2020 Research-status Report
  • [Presentation] Manipulations of deep irrigation and shading to change infection rate of arbuscular mycorrhizal fungi and growth of rice and pearl millet2023

    • Author(s)
      Y P, Ohtomo R, Kamoshita A
    • Organizer
      日本作物学会第255回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] アーバスキュラー菌根菌の増殖苗床の開発の予備研究2023

    • Author(s)
      請川弘次朗・大友量・鴨下顕彦
    • Organizer
      日本作物学会第255回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Rice varietal differences in yield and growth response to arbuscular mycorrhizal inoculation under Andosol upland field2023

    • Author(s)
      Sari A, Ohtomo R, Kamoshita A
    • Organizer
      日本作物学会第255回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 前土地管理の差異と2つの菌根菌資材の陸稲生育への効果の比較2023

    • Author(s)
      土田修平・大友量・鴨下顕彦
    • Organizer
      日本作物学会第255回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Changes in native arbuscular mycorrhiza fungus colonisation along crop growth stages in upland rice-winter crop rotation with 4 preceding land uses2023

    • Author(s)
      Kamanga P, Kamoshita A, Ohtomo R
    • Organizer
      第57回根研究集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Effect of inoculation of arbuscular mycorrhizal fungi on rice and pearl millet in upland with 3 irrigation levels2022

    • Author(s)
      Y P, Ohtomo R, Nakanishi H, Tsugama D, Kamoshita A
    • Organizer
      日本作物学会第254回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Rice varietal differences in arbuscular mycorrhizal fungi infection under upland field condition2022

    • Author(s)
      Sari A, Ohtomo R, Y P, Kamoshita A
    • Organizer
      日本作物学会第254回講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Infection of arbuscular mycorrhizal fungi on rice and pearl millet under three irrigation regimes in the upland field2022

    • Author(s)
      Y P, Kamoshita A, Ohtomo R
    • Organizer
      The 11th International Conference on Mycorrhiza
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pathway to Sustainability in Industrial and Livelihood Agriculture2022

    • Author(s)
      Kamoshita A
    • Organizer
      International Conference on Sustainability in Environment and Agriculture 2022 (ICSEA 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 三段階の灌漑の畑でのアーバスキュラー菌根菌のイネ2品種の感染2021

    • Author(s)
      Y, Kamoshita, Ohtomo
    • Organizer
      JCOM2021 菌根研究会 2021 年度大会
    • Related Report
      2021 Research-status Report
  • [Remarks] 菌根菌と根の研究 Mycorrhiza and root study

    • URL

      https://www.kamoshitalab.com/blank-2

    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2025-03-27  

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