Dark Anaerobic Inactivation of Photosynthetic Oxygen Evolution by Chlamydomonas reinhardtii
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概要
- 論文の詳細を見る
When intact cells of Chlarnydomonas reinhardtii were anaerobically incubated in the dark, rapid inactivation of oxygen evolution with benzoquinone as the Hill oxidant occurred. Measurements of electron transport using thylakoids isolated after anaerobic treatment showed that the inactivation occurred at, or before, the secondary electron acceptor of PS II, whereas PS I activity was largely unaffected. In addition, after anaerobic treatment fluorescence transients measured with no addition or with dibromo-methylisopropylbenzoquinone present were virtually the same as those obtained with DCMU present. When 10 mN NaHCO_3 was added to inactivated cells, part of the oxygen evolution capacity was restored rapidly. However, almost complete recovery (within 20 to 25 min) required the addition of oxygen as well. This recovery was not light-dependent and was faster in the presence of 1 mM KCN. We suggest that the in-activation of benzoquinone-dependent oxygen evolution was due to both bicarbonate depletion and reduction of the plastoquinone pool.
- 日本植物生理学会の論文
著者
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Asada Kozi
The Research Institute for Food Science, Kyoto University
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Asada Kozi
The Research Institute For Food Science Kyoto University
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Takahashi Masa-aki
The Research Institute for Food Science, Kyoto University
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Nash Diane
The Research Institute for Food Science, Kyoto University
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Nash Diane
The Research Institute For Food Science Kyoto University:(present)institute Of Molecular Biophysics
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Takahashi Masa-aki
The Research Institute For Food Science Kyoto University
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Takahashi Masa-aki
The Research Institulefor Fbod Science Kyoto University
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Asada Kozi
The Research Institulefor Fbod Science Kyoto University
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