2014 Fiscal Year Final Research Report
Specific mechanisms and functions of photosynthesis regulation in only tree plants.
| Project/Area Number |
24580228
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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 | Yamaguchi University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NOGUCHI Ko 東京大学, 大学院理学研究科, 准教授 (80304004)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 樹木生理 / 光合成 / 色素変化 / 樹木特異的環境応答 / カロチン |
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| Outline of Final Research Achievements |
In order to discover tree specific adaptations to environmental stresses, light responses of pigment composition, energy dissipation and photosynthesis were demonstrated in 6 herbaceous and 4 tree plants. Tree leaves with high ratio of alpha carotene in total carotenes of reaction center showed higher concentration of lutein-epoxide. Furthermore, NPQ, chlorophyll fluorescence parameter, were observed as a function of Xan cycle dependence in light conditions, while NPQ varied independent on Xan cycle in the dark as tree specific responses. To elucidate physiological functions in the Xan cycle-independent NPQ changes, photosynthesis, chlorophyll fluorescence, pigments, protein complexes of leaves were analyzed in detail in tree and herbaceous plants. From obtained results in the presence studies, we showed interrelation of lutein cycle, carotene replacements and Xan cycle-independent NPQ varies, but it was impossible to determine physiological function of the tree specific cycle.
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| Free Research Field |
樹木生理学
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