The middle region was composed of meristematic tissue whose cells had high proliferative activity (Plate Ib).

中层区是由增殖能力旺盛的分生组织细胞所构成；

youdao

The middle region was composed of meristematic tissue whose cells had high proliferative activity (Plate Ib).

中层区是由增殖能力旺盛的分生组织细胞所构成；

youdao