Freezing Injury and Uncoupling of Phosphorylation from Electron Transport in Chloroplasts
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چکیده
منابع مشابه
Site-specific uncoupling of photosynthetic phosphorylation in spinach chloroplasts.
In spinach chloroplasts which have been shaken with n-heptane, photophosphorylation coupled to the reduction of nicotinamide adenine dinucleotide phosphate is inhibited about 95% while the photoreduction of NADP+ (and ferricyanide) is stimulated as much as 50%. Photophosphorylation catalyzed by phenazine methosulfate, however, is inhibited only 50%. These data are interpreted to indicate that t...
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During attempts to prepare active fragments of spinach chloroplasts, we observed major losses of phosphorylative activity following suspension of the chloroplasts in water. This damage was traced to treatments which probably had the effect of removing cations from the chloroplasts, rather than to a simple physical disruption. Indeed, chloroplast fragments have been used successfully in studies ...
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15 صفحه اولPhotosynthesis in Fescue: I. HIGH RATE OF ELECTRON TRANSPORT AND PHOSPHORYLATION IN CHLOROPLASTS OF HEXAPLOID PLANTS.
Chloroplasts isolated from tall fescue, Festuca arundinacea Schreb., showed high rates of electron transport, comparable to rates observed for spinach chloroplasts.Chloroplasts were well coupled and rates of electron transport from water to methyl viologen (photosystem II and I) were increased two to five times when ADP and inorganic phosphate or methylamine (uncoupler) were added to the reacti...
متن کاملDio-9, an inhibitor of coupled electron transport and phosphorylation in chloroplasts.
Oxidative phosphorylation and photophosphorylation have been found to respond differently to various inhibitors. Ammonia inhibits photophosphorylation at low concentrations (I), whereas high concentrations are required to uncouple oxidative phosphorylation (2). Dinitrophenol, on the other hand, is a more potent uncoupler of oxidative phosphorylation than of photophosphorylation (3). Oligomycin ...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1967
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.42.10.1343