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. 1986 Feb;167(2):159-65.
doi: 10.1007/BF00391410.

Ethylene biosynthesis in isolated vacuoles of Vicia faba L. - requirement for membrane integrity

R G Mayne  1 , H Kende
Affiliations

Ethylene biosynthesis in isolated vacuoles of Vicia faba L. - requirement for membrane integrity

R G Mayne et al. Planta. 1986 Feb.

Abstract

The ability of vacuoles prepared from V. faba leaves to convert 1-aminocyclopropane-1-carboxylic acid to C2H4 was destroyed when vacuoles were lysed by passage through a hypodermic needle, freezing and thawing, osmotic shock, treatment with ethanol or with a detergent. Ethylene synthesis in the vacuolar fraction was also inhibited by the uncouplers carbonyl cyanide m-chlorophenyl hydrazone and dinitrophenol and by the ionophores valinomycin, nigericin, and A23187. Ethylene formation increased with increasing pH of the incubation medium over the pH range of 5.0-7.5. These observations support the hypothesis that C2H4 biosynthesis in vacuolar preparations is dependent on membrane integrity, possibly because of the requirement for a transmembrane ion gradient.

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