The middle region was composed of meristematictissue 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；
2
The vascular cambium extends to form a complete ring of meristematictissue around the stem, the separate vascular bundles being linked by interfascicular cambium.
维管形成层向两侧延伸直至形成一个茎内的分生组织环，各个维管束被束间形成层联系在一起。
3
The results of GUS staining showed that NPC2 expressed mainly in meristematic zone, elongation zone and vascular tissue of maturation zone of root tip;