Fatty acid synthesis by spinach chloroplasts III. Relationship between fatty acid synthesis and photophosphorylation
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概要
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The modes of actions of photosynthetic inhibitors on photosynthesis and fatty acid synthesis were examined. DCMU, an electron transport inhibitor, inhibited fatty acid synthesis and photo-phosphorylation to the same extent, suggesting dependence of fatty acid synthesis on photosynthesis. The same was also the case with FCCP, a photophosphorylation uncoupler. In contrast, NH_4Cl and phlorizin at concentrations completely suppressing ATP formation, only partially inhibited the fatty acid synthesis. These facts suggest that a certain level of high-energy intermediate (state) is responsible for the light enhancement of fatty acid synthesis. This idea is further supported by the fact that the partial inhibition of fatty acid synthesis by NH_4Cl was relieved by addition of DCCD at low concentrations suppressing the ATP formation but not completely destroying the high energy intermediate. The lag period in the initial period of fatty acid synthesis was shortened by preillumination of chloroplasts, even in the absence of ADP. This indicates that the light dependent fatty acid synthesis is closely associated with the high-energy intermediate (state), but not directly with ATP formation by photophosphorylation.
- 日本植物生理学会の論文
著者
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Nakamura Yasunori
Department Of Biological Production Akita Prefectural University
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Yamada Mitsuhiro
Departmellt Of Biology C:ollegc Of Gencral Educatioll Universsity Of Tokyo
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Nakamura Yasunori
Department Of Biology College Of General Education University Of Tokyo:(present)radioisotope Centre
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