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J Integr Plant Biol, 1982, 24 (4): -, Research Article
Structure and Function of Chloroplast Membrane XI. The Effects of Linolenic Acid on the Structure and the Absorption and Fluorescence Spectra of Wheat Chloroplast Membranes as well as Regulations by MgCl2
Zhang Qi-de, Tang Chong-qln, Li Shi-yi, Lin Shi-qing, Lou Shi-qing and Kuang Ting-yun
doi:
Abstract
The effects of various concentrations of linolenic acid on the structure and the absorption and fluorescence spectra of wheat chloroplast membranes were studied. Linolenic acid increases the absorption peaks in both red and blue regions of the chloroplast membranes. The degree of increase in the absorption peaks is proportional to the concentration within a range of concentration. Linolenic acid increased the fluorescence yield of F685 and F738 of chloroplast membranes. Electron microscopical studies revealed that the increases were mainly due to the disappearance of grana stacks and the unfolding of thylakoid membranes. The causes of effects of linolenic acid on the absorption and fluorescence spectra and the structure of chloroplast membranes as well as the reversion and regulation by MgCl2 were discussed.
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