Abstract
The involvement of H2O2generated by photosystem II (PSII) in the process of photoinhibition of thylakoids with a functional oxygen‐evolving complex (OEC) was investigated. The rate of photoinhibition was decreased to the rate of loss of activity in the dark when bovine Fe‐catalase was present during the photoinhibitory illumination. Photoinhibition was accelerated for both Cl−‐depleted and Cl−‐sufficient thylakoids when KCN was present to inhibit the thylakoid‐bound Fe‐catalase. We propose that these preparations become photoinhibed by reactions with H2O2produced via oxidation of water by the Cl−‐depleted OEC and by reduction of O2at the QBsite when PSII is illuminated without an electron acceptor.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 25, 2002, 3:43 a.m.) |
Deposited | 9 months ago (Dec. 2, 2024, 10:02 p.m.) |
Indexed | 2 months, 3 weeks ago (June 11, 2025, 3:45 a.m.) |
Issued | 34 years, 1 month ago (July 29, 1991) |
Published | 34 years, 1 month ago (July 29, 1991) |
Published Online | 23 years, 7 months ago (Jan. 16, 2002) |
Published Print | 34 years, 1 month ago (July 29, 1991) |
@article{Bradley_1991, title={The involvement of photosystem II‐generated H2O2in photoinhibition}, volume={286}, ISSN={1873-3468}, url={http://dx.doi.org/10.1016/0014-5793(91)80975-9}, DOI={10.1016/0014-5793(91)80975-9}, number={1–2}, journal={FEBS Letters}, publisher={Wiley}, author={Bradley, Ryan L. and Long, Krista M. and Frasch, Wayne D.}, year={1991}, month=jul, pages={209–213} }