Transplasma-membrane Ferricyanide Reduction in Sycamore Cells. Characterization of the System and Inhibition by Some Phenyl Biscarbamates
Plant science(1986)
Abstract
Evidence is presented for the presence of a transplasma-membrane redox system in sycamore cells, which were found able to reduce external ferricyanide. This reduction induced a simultaneous acidification of the external medium, with a H+/e− stoichiometry of 0.925. Ferricyanide reduction was accompanied by a slight reduction of potassium uptake (15% inhibition). The transmembrane electron transport was inhibited by oligomycin and quinacrine; the effect of the latter inhibitor was only temporary, owing to its progressive absorption by the cells.
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Key words
ferricyanide reduction,plasmalemma,Acer pseudoplatanus,biscarbamate
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