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The detection and estimation of the growth inhibitor xanthoxin in plants
R D Firn1, R S Burden, H F Taylor
1ARC Plant Growth Substance and Systemic Fungicide Unit, Wye College (University of London), Ashford, Kent, England.
Abstract:
The plant growth inhibitor xanthoxin which can be prepared in vitro by the oxidation of certain xanthophylls has been identified in the ether extracts of the shoots of a wide variety of higher plants. Gas liquid chromatography of an acetylated derivative has been used for its quantitative estimation.Evidence is provided that xanthoxin is a true endogenous inhibitor and that violaxanthin or a related xanthophyll epoxide is its biogenetic precursor. The importance of xanthoxin and its relationship with abscisic acid and other plant growth inhibitors is discussed.
