Plant Physiol. Drug Metab Dispos
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Plant Physiology 63:359-362 (1979)
© 1979 American Society of Plant Biologists

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Articles

Effects of Controlled Atmospheres on Production of Sesquiterpenoid Stress Metabolites by White Potato Tuber

Possible Involvement of Cyanide-resistant Respiration 1

Leo M. Alves2,3, Edward G. Heisler, John C. Kissinger, Joseph M. Patterson, III and Edwin B. Kalan

a Eastern Regional Research Center, Federal Research, Science and Education Administration, United States Department of Agriculture, Philadelphia, Pennsylvania 19118

Levels of katahdinone (solavetivone), lubimin, rishitin, and phytuberin, sesquiterpenoid stress metabolites of white potato (Solanum tuberosum), were monitored in tuber slices which were challenged with an extract of Phytophthora infestans and incubated under controlled atmospheres. A mixture of ethylene in air enhanced stress metabolite production. This enhancement was amplified by higher partial pressures of oxygen. Stress metabolite production was inhibited by salicylhydroxamic acid. These results suggest the involvement of cyanide-resistant respiration in the production of potato stress metabolites, compounds which may serve as phytoalexins.

2 National Research Council Postdoctoral Research Associate.

3 To whom reprint requests should be sent. Present address: Laboratory of Plant Morphogenesis, Department of Biology, Manhattan College, Bronx, New York 10471.

1 A brief account of this research was presented at the Annual Meeting of the American Society of Plant Physiologists at the University of Wisconsin, Madison, on August 17, 1977 (1).






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Copyright © 1979 by the American Society of Plant Biologists