Plant Physiol.
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Plant Physiology 65:1199-1202 (1980)
© 1980 American Society of Plant Biologists

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Articles

Metabolism of Hydrogen Cyanide by Higher Plants 1

Jacqueline M. Miller2 and Eric E. Conn

Department of Biochemistry and Biophysics, University of California, Davis, California 95616

A survey has been made of the occurrence and distribution of three enzymes which metabolize cyanide in a variety of higher plants including both cyanogenic and non-cyanogenic species. The enzymes investigated were {beta}-cyanoalanine synthase, rhodanese and formamide hydrolyase. {beta}-Cyanoalanine synthase was found to be present in every higher plant tested whereas rhodanese was found to occur far less commonly in plants. Formamide hydrolyase activity was not detected in any of the higher plants tested.

In addition, quantitative analyses have been made of the potential hydrogen cyanide content of each plant investigated. A general trend was apparent between the hydrogen cyanide potential and cyanide metabolizing activity, in that the higher the hydrogen cyanide potential, in general, the higher the cyanide metabolizing activity.

2 Current address: Department of Botany and Biochemistry, Westfield College, University of London, Kidderpore Avenue, London NW3 7ST England.

1 This work was supported in part by a grant from the National Science Foundation (NSF PCM77-25769-02).




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Copyright © 1980 by the American Society of Plant Biologists