Hydrogen Peroxide Production in Photosystem II Preparations
A photosystem II (PS-II) associated hydrogen peroxide production has recently been reported (1,2). It was found that when inside-out thylakoids or detergent prepared PS-II particles from spinach were illuminated (without any addition of electron acceptors or other redox substances) they produced H2O2, and that the production was linearly increased by illumination. The production was found to be inhibited by DCMU and heat treatment. The site of the PS-II associated H2O2 production was, however, not clarified. The production was found to be stimulated by NaCl-wash treatment known to release the 16 and 23 kDa proteins. This suggested the involvement of the donor-side of PS-II. If this is the case the substrate for the produced H2O2 would be H2O.
KeywordsHeavy Water Acceptor Side Increase Oxygen Concentration Mehler Reaction High Oxygen Level
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- 2.Schröder, W.P. and Åkerlund, H.E. (1987) In Progress in Photosynthesis Research,(ed. Biggins, J)volI.665–668Google Scholar