Respiration-Dependent Membrane Hyperpolarization in Tonoplast-Free Cells of Nitella axilliformis
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概要
- 論文の詳細を見る
Cells of Nitella axilliformis were made tonoplast-free by intracellular perfusion of media containing ethyleneglycol-bis-(β-aminoethylether)N,N'-tetraacetic acid (EGTA). When the perfusion medium contained ADP as well as ATP, the membrane hyperpolarized in darkness in a manner similar to light-induced hyperpolarization. This light-independent hyperpolarization seems to be due to activation of the electrogenic ion pump in the plasma membrane because the hyperpolarized value of the membrane potential was more negative than the equilibrium potential for K^+, the most negative ion equilibrium potential in Nitella. The hyperpolarization was inhibited by the respiratory chain inhibitors NaCN (1 mM), antimycin A (10 μM) and rotenone (10 μM). NaCN slightly decreased the ATP concentration in the cell perfused with medium containing 1 mM ATP and 1 mM ADP; but, even after treatment with NaCN, the cell had about 80% of the ATP value for the control.
- 日本植物生理学会の論文
著者
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MIMURA Tetsuro
Department of Biology, Graduate School of Science, Kobe University
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新免 輝男
Department Of Life Science Faculty Of Science Himeji Institute Of Technology
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Mimura Tetsuro
Department Of Biological Science Faculty Of Science Nara-women's University
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Shimmen Teruo
Department of Life Science, Faculty of Science, Himeji Institute of Technology
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Mimura Tetsuro
Biological Laboratory Hitotsubashi University
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Shimmen Teruo
Department Of Biology Faculty Of Science University Of Tokyo
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Tazawa Masashi
Department Of Applied Physics And Chemistry Fukui University Of Technology
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Tazawa Masashi
Fukui Institute of Technology
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Mimura T
Graduate School Of Science Kobe University
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Shimmen Teruo
Department Of Biology Faculty Of Science Osaka University:(present)department Of Botany Faculty Of S
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Tazawa Masashi
Departlnent Of Biology Faculty Of Science Osaka University
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