Photoreduction of ^<18>O_2 and H_2^<18>O_2 with Concomitant Evolution of ^<16>O_2 in Intact Spinach Chloroplasts : Evidence for Scavenging of Hydrogen Peroxide by Peroxidase
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概要
- 論文の詳細を見る
Illuminated intact spinach chloroplasts decomposed one molecule of H_2^<18>O_2 which resulted in the evolution of a half molecule of ^<16>O_2, but little ^<18>O_2. The chloroplasts showed the same rate of photoreduction of ^<18>O_2 as that of the evolution of ^<16>O_2 without accumulation of H_2^<18>O_2. These reactions were suppressed by DCMU, and also by several inhibitors of ascorbate peroxidase and dehydroascorbate and monodehydroascorbate reductases in chloroplasts. These observations indicate that the hydrogen peroxide produced in chloroplasts is reduced to water by a peroxidase using a photoreductant as the electron donor. The hydrogen peroxide scavenging system of chloroplasts was inactivated if hydrogen peroxide was added in the dark, but not if added during the light.
- 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 Kozi
Department Of Biotechnology Faculty Of Engineering Fukuyama University
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Asada Kozi
Department Of Environmental Biology Research School Of Biological Sciences Australian National Unive
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Badger M
Australian National Univ. Act Aus
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Badger Murray
Department of Environmental Biology, Research School of Biological Sciences, Australian National Uni
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