| Project/Area Number |
24580224
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Forest science
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
SUWA Ryuichi 琉球大学, 農学部, 准教授 (30560536)
MATSUMOTO Kazuho 琉球大学, 農学部, 准教授 (20528707)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 開花結実 / 繁殖資源 / 光合成産物 / 転流 / 安定同位体 / 果実生産 / 豊凶周期 / リュウキュウコクタン / 結実豊凶 / 種子生産 / 繁殖生理 / シンク能 / 資源配分 / 繁殖器官 / 琉球島嶼 |
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| Outline of Final Research Achievements |
We investigated the mechanism underlying variation in fruit production in the subtropical evergreen tree Diospyros ferrea. During a year of abundant fruit production and during 2 years of moderate fruit production in Diospyros ferrea, a fully defoliated reproductive module branch produced the same number of fruit and of the same size as did an undefoliated reproductive branch. Therefore, we tracked the transport of the photosynthesis product within the branch, using 13C stable isotope tracer experiments. We also quantified total soluble sugar, in the leaves, branches, and fruit. Our results suggested that, in evergreen trees, the pattern of the transportation of the photosynthesis product generated by the leaves in a year differs according to the differences in annual fruiting fluctuation. Similarly, the fate of the photosynthesis product differs as stored carbohydrate and current-year carbohydrate allocated to fruit production.
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