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Plant Physiology 63:589-590 (1979)
© 1979 American Society of Plant Biologists

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Articles

Regulation of Auxin-induced Ethylene Production in Mung Bean Hypocotyls

Role of 1-Aminocyclopropane-1-Carboxylic Acid 1

Yeong-Biau Yu, Douglas O. Adams and Shang Fa Yang

a Department of Vegetable Crops, University of California, Davis, California 95616

Ethylene production in mung bean hypocotyls was greatly increased by treatment with 1-aminocyclopropane-1-carboxylic acid (ACC), which was utilized as the ethylene precursor. Unlike auxin-stimulated ethylene production, ACC-dependent ethylene production was not inhibited by aminoethoxyvinylglycine, which is known to inhibit the conversion of S-adenosylmethionine to ACC. While the conversion of methionine to ethylene requires induction by auxin, the conversion of methionine to S-adenosylmethionine and the conversion of ACC to ethylene do not. It is proposed that the conversion of S-adenosylmethionine to ACC is the rate-limiting step in the biosynthesis of ethylene, and that auxin stimulates ethylene production by inducing the synthesis of the enzyme involved in this reaction.

1 This work was supported by National Science Foundation Grant PCM 78-09278.




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Copyright © 1979 by the American Society of Plant Biologists