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Plant Physiology 43:1699-1702 (1968)
© 1968 American Society of Plant Biologists

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Stimulation of Indoleacetic Acid Oxidase and Inhibition of Catalase in Cotton Extracts by Plant Acids

H. C. Lane and E. E. King

Crops Research Division, Agricultural Research Service, United States Department of Agriculture, State College, Mississippi 39762

Activity of indoleacetic acid oxidase in partially purified extracts from cotton is stimulated by small amounts of malate, succinate, fumarate, and other plant acids. The stimulation is apparently due to inhibition of catalase, which is detectable in certain preparations. The lag phase of indoleacetic acid oxidation by crude preparations is eliminated by steps in processing which conceivably either denatures or dilutes catalase, or concentrates inhibitors to catalase.






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ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1968 by the American Society of Plant Biologists