Stimulation of Photosystem I Electron Transport by High Concentration of 3-(3,4-Dichlorophenyl)-1,1-dimethyl Urea in Uncoupled Chloroplasts.


The light saturated rate of photosystem I-dependent electron transport (ascorbate/dichlorophenol-indophenol --> methyl vilogen in presence of 1 micromolar 3-[3,4-dichlorophenyl]-1,1-dimethyl urea [DCMU]) was increased by a high concentration of DCMU added to broken and uncoupled chloroplasts isolated from pea (Pisum sativum). At 50 micromolar DCMU, the… (More)


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