Abstract
Control of the synthesis of α-amylase in isolated aleurone tissue of an inbred population of wild oats and of the domestic oat variety Torch has been compared. Production of the enzyme in wild oats shows much greater dependence on exogenous gibberellic acid or amino acids than in Torch. It is suggested that this difference reflects variability in a genetic system which determines the degree of hormonal control over the synthesis of hydrolytic enzymes in aleurone of Avena species. Natural selection can be expected to maintain genotypes conferring strong hormonal control of this physiological system in wild oats which depend, for survival, on seed dormancy.
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