1987 Fiscal Year Final Research Report Summary
Structural and functional development of chloroplasts in coniferous seedlings
| Project/Area Number |
60540435
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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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 | Kyushu University |
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Principal Investigator |
OKU Tatsuo Kyushu Univ. Professor, 農学部, 教授 (70038256)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIDA Mizuki Kyushu Univ. Assistant Professor, 農学部, 助手 (10038284)
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| Project Period (FY) |
1985 – 1987
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| Keywords | Photosyntheses / Chloroplast development / Chlorophyll biosynthesis / トウヒ(piceaabies) |
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| Research Abstract |
Plastids in conifers and angiosperms grown without light have different pigment composition. Angiosperm etioplasts have prothylakoids lacking chlorophyll, while coniferous etiochloroplasts synthesize chlorophyll and undergo only limited development. Their thylakoids are slightly stacked and show photosynthetic activities. The present study deals with the photoconversion of protochlorophyllide, the formation of chlorophyll-protein complexes and stepwise development of photosystem II upon illumination of dark-grown seedlings of Picea abies. We conclude from the results that insuficiency of stacking of thylakoids limits chloroplast development in the dark and light-induced development of chloroplasts is closely associated with the synthesis of new photosynthetic units and the magnification of photosystem I and II units.
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