1980
DOI: 10.1016/0003-9861(80)90359-8
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Redox reactions on the reducing side of photosystem II in chloroplasts with altered herbicide binding properties

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Cited by 118 publications
(68 citation statements)
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“…,imilar small difference in photon yield may Further evidence that the resistance alteration causes slow nt in low PFD growth chamber-grown plants Qa to Qb electron transfer in low PFD-grown plants comes from the oxygen flash yield data. As seen in Table II 6,20) and in resistant chloroplasts (5,20 (12), high PFD exposure does indeed cause a differential lowering of photon yield in resistant leaf discs. Our evidence suggests that the decrease in photon yield in resistant plants is due to increased sensitivity of Dl to photoinhibitory damage (12).…”
Section: Discussionmentioning
confidence: 89%
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“…,imilar small difference in photon yield may Further evidence that the resistance alteration causes slow nt in low PFD growth chamber-grown plants Qa to Qb electron transfer in low PFD-grown plants comes from the oxygen flash yield data. As seen in Table II 6,20) and in resistant chloroplasts (5,20 (12), high PFD exposure does indeed cause a differential lowering of photon yield in resistant leaf discs. Our evidence suggests that the decrease in photon yield in resistant plants is due to increased sensitivity of Dl to photoinhibitory damage (12).…”
Section: Discussionmentioning
confidence: 89%
“…In resistant plants, the mutation causes substitution of a single amino acid at or near the triazine binding site (13) which greatly reduces triazine binding (27). However, the binding site alteration also slows by 10-fold the normal electron transfer between Qa and Qb (5). Slow electron flow between Qa and Qb has been suggested as the cause of the reduction in photon yield observed in resistant plants (14,15,19), and has been cited as the ultimate cause of decreased maximum photosynthesis in resistant plants ( 16).…”
mentioning
confidence: 99%
“…The resistant weed biotypes, when compared with the respective sensitive varieties, all show a reduced rate of re-oxidation of the primary PSII acceptor, Q (1,3,5). This has been directly measured by studying the rate of restoration of the fluorescence quenching ability of Q following a single saturating laser flash (3,5).…”
Section: Resultsmentioning
confidence: 99%
“…Controls (100% reaction rate) for each biotype were measured using the appropriate amount of 95% ethanol without dissolved atrazine. The experiment was replicated 4 times and 150 values were determined using linear regression analysis of the appropriate portions of the inhibition curves.…”
Section: Electrophoresismentioning
confidence: 99%
“…The altered QB protein in resistant biotypes reduces the rate of electron transfer between PSII quinone acceptors QA and QB, and thus, reduces the maximum rate of photosynthesis (4,17). Lower photosynthetic rates have been measured in the resistant biotypes of nonisonuclear resistant and susceptible biotype pairs of S. vulgaris ( 15,27), Amaranthus retroflexus (30), and Brassica spp.…”
mentioning
confidence: 99%