Energy conversion and changes in physical parameters in chloroplasts and subchloroplast particles I. Ion transport, ionic environment and the light-induced 475-515 nm absorbance change
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概要
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The light-induced absorbance change at 515 nm and the light-induced hydrogen ion uptake in chloroplasts are sensitive to physical treatment and to changes in ionic environment. High concentrations of salts (chlorides) were inhibitory to the 515-nm absorbance change. This inhibition was stronger in chloroplasts than in subchloroplast particles. In subchloroplast particles, NH_4Cl was slightly stimulatory for the 515-nm change at low concentrations (〜0.5 mM) as was the case with photophosphorylation. Tetraphenylboron (TPB), as a permeant anion, inhibited the 515-nm change and the rate of hydrogen ion uptake. Tetraphenylarsonium (TPA) and tetraphenylphospho-nium (TPP), both permeant cations, diminished the 515-nm change but did not affect the hydrogen ion uptake. These results are analyzed in connection with a discussion of the significance of the membrane potential and hydrogen ion gradient in the energy conversion of chloroplasts and subchloroplast particles.
著者
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Nishimura Mitsuo
Department of Biology, Faculty of Science, Kyushu University
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Nishimura Mitsuo
Departmcnt Of Biology Faculty Of Science Kyushu University
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Wakamatsu Kunimitsu
Department Of Biology Faculty Of Science Kyushu University:(present)fukuoka Women's University
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Wakamatsu Kunimitsu
Department Of Biology Faculty Of Science Kyushu University
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