The isolation of an abscisic-acid metabolite, 4'-dihydrophaseic acid, from non-imbibed Phaseolus vulgaris seed.
Naturally occurring 4'-dihydrophaseic acid (DPA) has been isolated from mature, non-imbibed bean seed. The concentrations of abscisic acid (ABA), phaseic acid (PA) and DPA in the seed were estimated to be 0.06, 0.11 and 5.95 mg/kg dry wt., respectively. The results suggest that DPA is a major inactivation product of ABA in this tissue. The possible pathway from ABA to DPA is discussed.
Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 13210, Syracuse, New York, USA.
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