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Physiological mechanism of submergence tolerance under turbid-water in rice (Oryza sativa L.) -Focused on the photosynthetic activity in leaves

Research Project

Project/Area Number 26850007
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Crop production science
Research InstitutionAkita Prefectural University

Principal Investigator

Sone Chiharu  秋田県立大学, 生物資源科学部, 助教 (30710305)

Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2014: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywordsイネ / 冠水ストレス / 濁水 / 光合成 / クロロフィル蛍光 / 冠水 / Fv/Fm / 光合成活性
Outline of Final Research Achievements

The survival of rice seedlings after complete submergence decreased with increased turbidity of water. In this study, we clarified the effects of turbid-water submergence on photosynthetic activity and chlorophyll breakdown in the submerged rice leaves, as indicated by the maximal quantum yield of PSII photochemistry (Fv/Fm). In the experiment that used 55 rice cultivars, the shoot elongation during submergence and the shoot biomass accumulation after post-submergence were differed between three submergence conditions (submergence of tap-water, covered the water tank of submergence of tap-water with shading sheet, turbid-water submergence). There were significantly interaction effects between cultivars and submergence conditions. A cultivar, Milyang23 had the submergence tolerance gene Sub1A. Milyang23 suppressed photodamage and chlorophyll breakdown in the leaves under tap-water submergence but they were promoted under turbid-water submergence.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (1 results)

All 2015

All Presentation (1 results)

  • [Presentation] 冠水条件が冠水中および退水後のイネ苗(Oryza sativa L.) の生育に及ぼす影響と品種間差異2015

    • Author(s)
      曽根千晴、鈴木のぞみ
    • Organizer
      日本作物学会第239回講演会
    • Place of Presentation
      日本大学生物資源科学部湘南キャンパス
    • Year and Date
      2015-03-27 – 2015-03-28
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2018-03-22  

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