报道了莲无初生根型幼苗的胚根发育过程 ,其胚根由分生组织转化成贮藏组织 ,致使胚根不突破种皮 ;莲幼苗初生维管系统中的筛分子为筛管分子。莲的子叶和胚根连为一体的特殊结构与其生活环境和系统演化密切相关 The radicle development of lotus rootless seedlings was reported. The radicle was transformed into meristems by meristems so that the radicle did not break the seed coat. The sieve molecules in the primary vascular system of lotus seedlings were sieve tube molecules. The special structure of lotus cotyledon combined with radicle is closely related to its living environment and system evolution