Fig. 4
From:The regeneration ofAcer rubrumL. “October Glory” through embryonic callus
The adventitious bud induction of embryonic callusa: On the basis of mature embryo callus, the adventitious bud germinated after being cultured 7-9d.b: After 2 subcultures, the elongation of adventitious bud was increased;c: Continue to culture 30d, new adventitious buds formed like③;d: After a 40d subculture, bud②unfolded to form branches