title: Metabolism of Exogenous Indoleacetic Acid to Its Amide Conjugates in Cucumis sativus L.
abstract: Incubation of hypocotyl segments of light-grown Cucumis sativus L. in 0.1 millimolar 3-indoleacetic acid for 16 hours led to the formation of indoleacetylaspartate and indoleacetylglutamate. There was no evidence for the formation of other conjugates of 3-indoleacetic acid with individual amino acids during the period from 4 to 48 hours of incubation. Indoleacetylglutamate reached its maximum concentration after about 4 hours of incubation and indoleacetylaspartate after about 8 hours. These levels remained unchanged for at least 40 hours. Indoleacetylaspartate caused small increases in cucumber hypocotyl segment growth at high concentrations, 1 millimolar being more effective than 0.1 millimolar.
authors: Department of Biology, Harvey Mudd College, Claremont, California 91711.
authors: W K
authors: WK
authors: Purves
authors: S M
authors: SM
authors: Hollenberg