Fig. 6From: The regeneration of Acer rubrum L. “October Glory” through embryonic callusThe adventitious root induction of embryonic callus a: After culturing type VI callus in adventitious root induction medium for 23 d, the embryonic callus gradually became white and loose and formed many infinitive roots. b: After 60 d of continuous cultivation, the adventitious roots of embryonic callus without adventitious buds germinated in large quantities. c: After the callus that had been differentiated to form adventitious buds was cultured for 25 days, the green embryonic callus gradually changed to white, and a large number of adventitious roots were generated on it. d: The amount of adventitious roots and leaves thrived after 20 dBack to article page