There were two formations of somatic embryogenesis, one was direct formation of somatic embryo from immature zygotic embryo, there was no evendence of the intervention of the callus stage.

• 组织学观察表明，番木瓜幼胚培养时，愈伤组织最先发生于靠近胚根端（形态学的下端）的表皮细胞，有干性和粘性两类。