| Project/Area Number |
26440139
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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 | Nagoya University |
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Principal Investigator |
Itoh Shigeru 名古屋大学, 理学研究科, 名誉教授 (40108634)
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| Co-Investigator(Renkei-kenkyūsha) |
IWASAKI Ikuko 秋田県立大, 生物資源科学部, 准教授 (50312236)
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| Research Collaborator |
YAMAKAWA Hisanori 名古屋大学, 生命農学研究科, 博士研究員 (40456645)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 光合成 / 環境応答 / 光阻害 / 励起エネルギー移動 / クロロフィル蛍光 / 光化学系 / 乾燥耐性 / 地衣類 / クロロフィル / 光障害 / 乾燥適応 / 共生 / 乾燥耐性コケ / 光適応 / 物質生産 / コケ類 / 過剰エネルギー散逸 / 光障害回避 / 蛍光寿命 / レーザ分光 / 光耐性 / 光エネルギー移動 / コケ |
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| Outline of Final Research Achievements |
Mechanisms of drought-induced extra energy dissipation were newly identified in drought-tolerant photosynthetic organisms. Analysis by picosecond fluorescence lifetime measurement revealed this mechanism in a wide variety of species. Fluorescence lifetime was shown to become shorter due to the quenching of excited state that is faster than the photoreaction rate. Similar mechanisms were identified in 5 species of cyanobacteria, 10 species of mosses, 55 species of lichens (symbionts of fungi and cyanobacteria/algae) and 1 higher plant. Different types of mechanism were identified in organisms living under various environments.
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