Abstract
AbstractA procedure for extracting and identifying plant hormones, particularly abscisic acid (ABA) and the gibberellins (GA) was developed through modification of methods described in the literature. The procedure is particularly useful for studying more than one hormone simultaneously in a given sample, and when the supply of plant material is limited.The procedure was used to isolate ABA and GA‐like substances from olive tissue (i.e., leaves, buds and inflorescences). Gibberellin‐like substances were identified by their action on α‐amylase release from embryoless barley half‐seeds.Characterization of an acidic inhibitor extracted from olive inflorescences by thin‐layer chromatography, fluorescence under ultraviolet light, gas chromatography, and physiological effects on wheat coleoptile sections indicate that this inhibitor, or at least a component of it, is very similar if not identical with at least one isomeric form of synthetic abscisic acid.
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