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Plant Physiology 77:873-876 (1985)
© 1985 American Society of Plant Biologists

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Articles

Evidence for a Plasmalemma Redox System in Sugarcane 1

Margaret Thom and Andrew Maretzki

Experiment Station. Hawaiian Sugar Planters' Association, Aiea, Hawaii 96701

A plasmalemma-bound NADH-dependent redox system has been identified in protoplasts isolated from cell suspensions of sugarcane. This system oxidized NADH as well as NADPH, increased O2 consumption 3-fold, and increased the pH of the external medium while the cytoplasmic pH was decreased. In the presence of NADH, ferricyanide was rapidly reduced and the external medium was acidified. The uptake rates of K+, 3-O-methylglucose, leucine, and arginine were all decreased in the presence of NADH.

1 Published with the approval of the Director as Paper No. 585 in the Journal Series of the Experiment Station, Hawaiian Sugar Planters' Association.






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Copyright © 1985 by the American Society of Plant Biologists