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. 1971 Apr;47(4):576-80.
doi: 10.1104/pp.47.4.576.

An evaluation of 4-s-methyl-2-keto-butyric Acid as an intermediate in the biosynthesis of ethylene

M Lieberman  1 , A T Kunishi
Affiliations

An evaluation of 4-s-methyl-2-keto-butyric Acid as an intermediate in the biosynthesis of ethylene

M Lieberman et al. Plant Physiol. 1971 Apr.

Abstract

Stimulation of ethylene production by cauliflower (Brassica oleracea var. botrytis L.) tissue in buffer solution containing 4-S-methyl-2-keto-butyric acid is not due to activation of the natural in vivo system. Increased ethylene production derives from an extra-cellular ethylene-forming system, catalyzed by peroxidase and other factors, which leak from the cauliflower tissue and cause the degradation of 4-S-methyl-2-keto-butyric acid. This exogenous ethylene-forming system is similar to the ethylene-forming horseradish peroxidase system which utilizes methional or 4-S-methyl-2-keto-butyric acid as substrate. We conclude that 4-S-methyl-2-keto-butyric acid is probably not an intermediate in the biosynthetic pathway between methionine and ethylene.

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References

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