Physiological Effects of Gibberellic Acid. IX. Recovery of Gibberellic Acid Following Incubation with Endosperm

Abstract

Reci-evd I)ecember 22, 1966. Siminiarv. To (letermmiie the fate of gibberellic acid (GA,.) (5,12,14), aIndI it is qtuite clear that the initial loctus of hormonal activity resides in the aleturoine layer which suirrotuinds the starchv portion of the en(losperm (5,11).As a l)ioassay for GA, the release of re(duicing suigar has proved to be a simple, specific, reliable aild extremely sensitive assay with several major aclvantages over other hioassay's (2,6

Gibberellins: Structure and Metabolism

“…Metabolic transjormations.-After incubation of barley endosperm (embryo-less half-seeds) with GAa, the medium contained no less hormone than before [as a matter of fact, it seemed to contain somewhat more, prob ably because of synergistic effects of released endosperm constituents in the bioassay (183)]. Thus, very little hormone is utilized in the response, i.e.…”