LIPIDS AND LIGHT DEPENDENT SWELLING OF ISOLATED SPINACH CHLOROPLASTS
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概要
- 論文の詳細を見る
The light-dependent high-amplitude swelling of spinach chloroplasts suspended in 175mM NaCl buffered with 50mM Tris-HCl (pH 7.9) was investigated by a packed weight technique and by electron microscopy. Endogenous neutral and charged lipids were released by the thylakoid membrane to about the same extent during chloroplast incubation in both the light and the dark. The addition of laurate, oleate, stearate, lecithin and lysolecithin increased chloroplast swelling in the dark, but inhibited swelling in the light. Acetone increased chloroplast swelling at low concentrations and inhibited at high concentrations in both the light and the dark. For 20% acetone, the grana stacks disappeared and a newly formed membrane system appeared which was similar to a myelin structure. The role of lipid components in the conformation of the membrane structure is discussed and a mechanism for light-induced chloroplast swelling based on a hydrogen-sodium exchange is proposed.
- 日本植物生理学会の論文
著者
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MURAKAMI S.
Department of Biology, University of Osaka Prefecture
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Nobel P.s.
Department Of Biology University Of Tokyo:(present)department Of Botanical Sciences University Of Ca
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