Abstract
Gibberellins have been shown to promote seed germination of various hardwood and coniferous trees by overcoming dormancy (1-7). This note reports results of a study undertaken to determine effects of gibberellic acid (GA-3) on rate and capacity of germinmation of tree seed soaked in a high concentration of the hormone for a short time. In this completely randomized experiment 2 levels of gibberellic acid (GA-3) were applied to seed that had been stored for at least 6 months. Seed was soaked 12 hours in an aqueous solution of a 75 percent potassium salt at 250 or 500 ppm. A control was soaked only in distilled water. Twenty-five seed of a single species were placed on filter paper in Petri dishes and kept moist with distilled water. Four replications of each treatment were placed on a countertop in an air conditioned room kept at approximately 20°C. Table 1. Germination of individual species seed after soaking 12 hours in GA-3.
Published Version
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