Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 75:138-141 (1984)
© 1984 American Society of Plant Biologists

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Effect of Sulfhydryl Reagents on K+ Efflux from Rose Cells

Relationship to Ultraviolet-Stimulated Efflux

Terence M. Murphy

Department of Botany, University of California, Davis, California 95616

N-Ethylmaleimide causes a rapid efflux of K+ from suspension-cultured cells of Rosa damascena. This efflux shows many characteristics of the ultraviolet-induced efflux of K+, including the appearance of HCO3– together with the K+ and inhibition by respiratory inhibitors. Cysteine inhibits the ultraviolet-induced efflux of K+. These results are interpreted to mean that ultraviolet induces K+ efflux through an alteration of sulfhydryl residues.






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Copyright © 1984 by the American Society of Plant Biologists