Alternative Path Mediated Chloride Absorption in Cyanide-Resistant Tissues

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Abstract
The ability of 2 cyanide-resistant tissues (aged potato [cv. Russet Burbank] slices and fresh preclimacteric banana [Musa cavendishii] slices) to take up Cl- in the presence of cyanide was established. Extensive inhibition of Cl- uptake by cyanide and chlorbenzhydroxamate together indicates that chloride absorption in the presence of cyanide is supported by respiration mediated by the alternative path. The partial inhibition of respiration-dependent Cl- uptake by chlorbenzhydroxamate alone is independent of its effect on the alternative oxidase and points to inhibition of the transport process per se.