doi: 10.1104/pp.44.9.1342.
Photooxidation by photosystem II of tris-washed chloroplasts
- PMID: 4392317
- PMCID: PMC396265
- DOI: 10.1104/pp.44.9.1342
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Photooxidation by photosystem II of tris-washed chloroplasts
Plant Physiol.
1969 Sep.
Abstract
Irradiation of tris-washed chloroplasts with moderate intensities of red light caused a partial bleaching of chloroplast pigments and an inhibition of the hydroquinone-supported photoreduction of NADP. The presence of an electron donor for photosystem 2 (PS2) during the irradiation prevented the bleaching and inhibition. It is concluded that the strong oxidant produced by PS2 accumulates in tris-washed chloroplasts during irradiation and an electron donor for PS2 protects against the photooxidation reactions.
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