| Project/Area Number |
25440141
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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 |
Plant molecular biology/Plant physiology
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| Research Institution | International Christian University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
楢本 悟史 東北大学, 生命科学研究科, 助教 (30612022)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 光合成 / 葉緑体 / 概日時計 / LHY / CCA1 / シロイヌナズナ / 光周性 / 既日時計 / クロロフィル / 補償性 |
|---|
| Outline of Final Research Achievements |
Circadian clock ensures consistency in antenna size under different photoperiod conditions. We named this novel clock function “photoperiodic compensation.” Double loss of function of LHY and CCA1 (lhy;cca1) resulted in changes in the total chlorophyll (Chl) level and Chl a/b ratio depending on the photoperiod. Under continuous light conditions (LL), the total Chl level increased significantly and the Chl a/b ratio decreased in lhy;cca1 compared with those in the wild type (WT). Increased stacked grana thylakoid membranes in chloroplasts were also observed in lhy;cca1 under LL. LIGHT HARVESTING COMPLEX II, which is an antenna protein involved in photosynthesis, accumulated to high levels in lhy;cca1 under LL compared with the WT.
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