Effect of (2-Chloroethyl)trimethylammonium Chloride on the Formation and Dormancy of Aerial Tubers of Begonia evansiana

The effect of (2-chloroethyl)trimethylammonium chloride (CCC) on the formation and dormancy of aerial tubers in Begonia evansiana was investigated. CCC was applied to the nutrient solution in which the rooted cuttings were grown, or directly to the buds.CCC accelerated the tuber initiation under SD conditions, and prevented the tubers from entering a dormant state.If we assume that CCC has actually lowered the native GA level, the present results would suggest that the endogenous GA is one of the factors controlling the tuber initiation and tuber dormancy in this plant, the view which has been advanced on the basis of the experiments with exogenous GA.