| Project/Area Number |
01304003
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
植物生理学
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| Research Institution | Biological Laboratory, College of General Education, Kyushu University |
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Principal Investigator |
OKAYAMA Shigeki Kyushu University, Col. of Gen. Educ. Professor, 教養部, 教授 (50038444)
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| Co-Investigator(Kenkyū-buntansha) |
MURATA Norio National Institute for Basic Biology Professor, 教授 (90011569)
SAKURAI Hidehiro Waseda University, Schoool of Education Professor, 教育学部, 教授 (10063645)
SATOH Kimiyuki Okayama University, Faculty of Science Professor, 理学部, 教授 (10032822)
ASADA Kouji Kyoto University, Res. Inst. for Food Sci. Professor, 食糧科学研究所, 教授 (50027182)
FUJITA Yoshihiko National Institute for Basic Biology Professor, 教授 (40013560)
塩井 祐三 宮崎医科大学, 医学部, 助教授 (70094092)
渡辺 正 東京大学, 生産技術研究所, 助教授 (70092385)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥11,000,000 (Direct Cost: ¥11,000,000)
Fiscal Year 1990: ¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 1989: ¥5,100,000 (Direct Cost: ¥5,100,000)
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| Keywords | Photosynthesis / Photoinhibition / Photosystem / Photoregulation / Chlorophyll / Reaction Center / D1 protein / Peroxidase / 光損傷 / ペルオキシダ-ゼ / 光化学系 / 反応中心 / チトクロ-ム / アスコルビン酸ペルオキシダ-ゼ |
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| Research Abstract |
Chlorophyll was found to be degraded enzymatically in the order of chlorophyride, pheophorbide and piropheophorbide. Epimerization of chlorophyll was also found to be selfcatalyzed by a central magnesium.
Photoinhibition of the accumulation of photosynthetic pigments during the aerobic growth of a photosynthetic bacterium was shown to be regulated by photoregulation of translation of the apoprotein-gene.
Photosystem I was found to have the cylclic electron transport system to avoid the photoinhibition by reducing the production of harmful active oxygens.
Unsaturated fatty acids was found to be effective to avoid the photoinhibition of the photosystem II.
The processing enzyme of photosystem II reaction center D1 protein was purified and characterized from the thylakoids.
Photoregulation of the stoichiometry of thylakod components was shown to be effected by synthesis and supply of the chlorphyll a.
Enzymatic and molecular propeties of peroxidases which scavenge active oxygens were studied.
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