| Project/Area Number |
26850007
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Crop production science
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| Research Institution | Akita Prefectural University |
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Principal Investigator |
Sone Chiharu 秋田県立大学, 生物資源科学部, 助教 (30710305)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| 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)
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| 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 |
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| 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.
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