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Performance and genetic diversity of saline resistance for the grain filling in rice and wheat

Research Project

Project/Area Number 19K05995
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 InstitutionShimane University

Principal Investigator

Tohru Kobata  島根大学, その他部局等, 名誉教授 (60186723)

Co-Investigator(Kenkyū-buntansha) 平井 儀彦  岡山大学, 環境生命科学研究科, 教授 (80263622)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsイネ / コムギ / 塩害 / 耐塩性 / 登熟 / 穂培養法 / 塩集積 / 土壌塩濃度 / 穂首 / Naイオン / Clイオン / 登熟期 / トルコ / 穂首塩濃度 / 子実成長 / 品種間差 / 品種 / 穂培養 / 塩排除 / 子実 / 塩排除能
Outline of Research at the Start

世界で塩害は重要な基幹作物であるイネやコムギ生産に深刻な影響を与えており,さらに温暖化にともなう海水面の上昇や降雨減少が塩害を増加させている.しかし,植物体内の吸収塩類による直接的な子実成長への影響と品種耐性はほとんどわかっていない.塩害では植物器官の脱水と塩集積による同化阻害が子実成長への影響と同時に起こり子実の塩耐性評価が大変難しいため子実成長の塩耐性は全く着目されてこなかった.そこで、本研究はイネとコムギにおける塩による子実成長阻害を,1.穂培養法を用いた子実成長の塩濃度反応,2.子実へ供給される塩濃度を低下させる塩排除機能の両面から子実成長の塩耐性とその遺伝的多様性を明らかにする.

Outline of Final Research Achievements

The objective was to identify traits associated with salt resistances of the grain filling under salt stress in rice and wheat. Four rice cultivars with different salt tolerance were grown in soils with different NaCl concentrations (0-100 mM). The grain weight, total plant dry weight, and harvest index decreased with increasing soil salinity particularly in sensitive cultivars and the grain weight highly correlated with harvest index than total plant dry weight. In salt-tolerant cultivars, the salt concentration in the internodes hardly increased. In salt-tolerant rice, the grain filling rate of detached spikelet less decreased than in salt-sensitive cultivars under high salt cultural solution, and in wheat the rate showed a wide frequency distribution. It was concluded that the grain filling rate in salt-tolerant cultivars was maintained under high salt concentration (rice and wheat) and tended to reduce salt absorption from the soil (rice).

Academic Significance and Societal Importance of the Research Achievements

今後の人口増加や温暖化が進むの元での食料生産維持、拡大のためには塩害地、海水侵入地域への作物の作付けが必要である。主要作物であるイネとコムギは沿海部や乾燥地において塩害を受けており、子実生産で最も直接的影響を受ける登熟期における塩耐性の品種間差は十分明らかにされていない。従って、登熟過程に着目した本研究はこれらの登熟期の耐塩性を構成する要因とそれらが品種差に与える影響を明らかにしようとしており、今後の品種改良へ着目すべき形質を提言出来ることが期待できる。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (13 results)

All 2024 2022 2021 2019 Other

All Int'l Joint Research (5 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] チュクロバ大学農学部(トルコ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] チュクロバ大学農学部(トルコ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] チュクロバ大学農学部(トルコ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] チュクロバ大学農学部(トルコ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] チュクロバ大学農学部(トルコ)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Diversity of Stay Green Traits in Flag Leaf of Rice2021

    • Author(s)
      小葉田 亨, 富阪 康平, 篠永 美和, Shaobing Peng
    • Journal Title

      Japanese Journal of Crop Science

      Volume: 90 Issue: 2 Pages: 177-181

    • DOI

      10.1626/jcs.90.177

    • NAID

      130008040265

    • ISSN
      0011-1848, 1349-0990
    • Year and Date
      2021-04-05
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Grain filling response to salt concentrations and the contribution of low salt absorption from soils to the grain filling in rice and wheat2024

    • Author(s)
      Kobata T., Hirai Y and Barutcular C.
    • Organizer
      日本作物学会第257回講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ダイズのリン酸施用量と吸収量の定量的関係と窒素施肥がそれらの関係に与える影響2022

    • Author(s)
      垣内 仁,、小葉田 亨
    • Organizer
      第255回日本作物学会講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] NERICAイネの蒸散と水利用効率に及ぼす土壌乾燥の影響2022

    • Author(s)
      Nguyen Hien Thi Thanh, 山中 碩人, 小葉田 亨, 平井 儀彦, 齊藤 邦行
    • Organizer
      第255回日本作物学会講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] NERICA イネの土壌乾燥に伴う蒸散低下率2022

    • Author(s)
      山中 碩人, Nguyen Hien Thi Thanh, 小葉田 亨, 平井 儀彦, 齊藤 邦行
    • Organizer
      第255回日本作物学会講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Effects of water use efficiency on plant dry matter in NERICA and Japanese rice cultivars under drought conditions2022

    • Author(s)
      N T T H Hien, H Yamanaka, T Kobata, Y Hirai and K Saitoh
    • Organizer
      IOP Conference Series: Earth and Environmental Science
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] インド型イネ品種IR64の遺伝的背景を有する染色体断片系統群における地表根発生と光との関係2021

    • Author(s)
      冨田 朝美, 齊藤 大樹, 福田 善通, 平井 儀彦, 齊藤 邦行, 小葉田 亨
    • Organizer
      第251回日本作物学会講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] コムギとオオムギの耐塩性の種間差および品種間差に関わる要因の解析2019

    • Author(s)
      上野 綾華, Hanh Duy Dao, 小葉田 亨, 齊藤 邦行, 平井 儀彦
    • Organizer
      第248回日本作物学会講演会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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