NAD(P)H Dehydrogenase-Dependent, Antimycin A-Sensitive Electron Donation to Plastoquinone in Tobacco Chloroplasts
スポンサーリンク
概要
- 論文の詳細を見る
Cyclic electron transport around PSI through the NAD(P)H dehydrogenase complex(NDH)in tobacco leaf disks, measured as an increase in the dark level of Chl fluorescence after the onset of darkness, was inhibited by antimycin A, an inhibitor of ferredoxin quinone reductase(FQR), suggesting that antimycin A inhibits not only the FQR-mediated cyclic flow but also the NDH-dependent flow. This electron flow was inhibited also by amytal, an inhibitor of mitochondrial NDH and by nigericin. The reduction of plastoquinone was detected when NADPH and ferredoxin were added to the suspension of the osmotically ruptured chloroplasts of the wild type and NDH-defective mutant. Because the addition of NADPH alone did not induce the reduction, membrane-bound ferredoxin NADP^+ reductase(FNR) was supposed to reduce ferredoxin, which may be a more direct electron donor for the plastoquinone reduction. The presence of two types of reducing enzymes was suggested from the bi-phasic inhibition of plastoquinone reduction by antimycin A in the wild type. It is proposed that the reducing activity inhibited by antimycin A at a low concentration is attributed to FQR and the less sensitive activity to NDH.
- 日本植物生理学会の論文
著者
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Asada Kozi
Department Of Biotechnology Faculty Of Life Science And Biotechnology Fukuyama University
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Asada K
Fukuyama Univ. Hiroshima Jpn
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Asada Kozi
Dept. Biotech Fac. Engin. Fukuyama Univ.
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Asada Kozi
Faculty Of Bioscience And Biotechnology Fukuyama University
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Asada K
The Research Institute For Food Science Kyoto University
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Endo Tsuyoshi
Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
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Shikanai Toshiharu
Nara Institute of Science and Technology, Graduate School of Science and Technology
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Sato Fumihiko
Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
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ENDO Tsuyoshi
Kyoto Univ.Food Sci.
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Asada Kozi
The Research Institute For Food Science Kyoto University:(present)department Of Biotechnology Facult
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Asada Kozi
Department Of Biotechnology Faculty Of Engineering Fukuyama University
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Endo Tsuyoshi
Department Of Bioresource Science Obihiro University Of Agriculture And Veterinary Medicine
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Sato F
Div. Of Integrated Life Sci. Graduate School Of Biostudies Kyoto Univ.
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Shikanai Toshiharu
Department of Botany, Graduate School of Science, Kyoto University
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Shikanai Toshiharu
Riken Institute
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Shikanai Toshiharu
Nichirei Corporation
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Endo Tsuyoshi
Department Of Plant Genes And Totipotency Graduate School Of Biostudies Kyoto University
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Endo Tsuyoshi
Division Of Applied Life Sciences Graduae School Of Agriculture
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Asada K
Dept. Biotech Fac. Engin. Fukuyama Univ.
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Endo T
Graduate School Of Biostudies Kyoto University
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Asada Kozu
The Research Institute For Food Science Kyoto University
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Sato Fumihiko
Division Of Applied Life Sciences Graduate School Of Agriculture Kyoto University
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Sato Fumihiko
Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University
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