1981
DOI: 10.1016/0014-5793(81)80166-4
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Redox potentials of electron acceptors in photosystem IIα and IIβ

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1983
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Cited by 78 publications
(26 citation statements)
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“…One theory is that these herbicides block electron flow between the primary acceptor (Q) and the secondary acceptor (B) by decreasing the redox potential of B, which shifts the equilibrium of Q-B ± QB-to the left (32). Changes in redox potential due to herbicides have yet to be demonstrated (29). A second theory is that B is a quinone free to diffuse in the thylakoid membrane and exchange with the plastoquinone pool (12,26).…”
mentioning
confidence: 99%
“…One theory is that these herbicides block electron flow between the primary acceptor (Q) and the secondary acceptor (B) by decreasing the redox potential of B, which shifts the equilibrium of Q-B ± QB-to the left (32). Changes in redox potential due to herbicides have yet to be demonstrated (29). A second theory is that B is a quinone free to diffuse in the thylakoid membrane and exchange with the plastoquinone pool (12,26).…”
mentioning
confidence: 99%
“…Because PSII exists in different forms in cells, we measured two types of heterogeneity, one that determines electron-transport capacity and one that determines the effective size of the antenna system serving individual reaction centers. The electron-transport assay distinguishes between PSII A and PSII X reaction centers (Thielen and Van Gorkom, 1981;Lavergne, 1982aLavergne, , 1982bMelis, 1985;Graan and Ort, 1986;Chylla et al, 1987;Chylla andWhitmarsh, 1989, 1990;Nedbal et al, 1991). PSII A centers turn over at rates of a few hundred electrons per second in saturating light, whereas the turnover of PSII X is 1/10th to 1/1000th that of active centers.…”
mentioning
confidence: 99%
“…the PSII reducing side heterogeneity (24,25,29,45). This type of heterogeneity was identified by the inability of a small fraction of PSII centers to transfer electrons from Q. to QB.…”
mentioning
confidence: 99%