Corpus The central region of the meristem below the tunica where cell divisions are in all directions giving both increased width and length to the apex.
Corpus The central region of the meristem below the tunica where cell divisions are in all directions giving both increased width and length to the apex.
原体：位于原套下的分生组织的中央区域，细胞可以进行各个方向的分裂，不断增加体积。