cork cambium

Meanwhile, paraffin-cut section method was used for studying on callus formation, cork cambium and vascular cambium initiation.

同时，运用石蜡切片法研究剥皮后愈伤组织的形成、木栓形成层和维管形成层的发生；

However, before forming the cork cambium, pericyclic cells produced many layers pericyclic parenchyma cells by periclinal division.

但中柱鞘细胞在形成木栓形成层前，先进行平周分裂，形成了由多层细胞组成的中柱鞘细胞环。

The primary xylem of root is diarch, of which developmental process contains primary growth and secondary growth. Secondary growth mainly depends on the activity of the vascular cambium and cork cambium.

其根为二原型，发育过程可分为初生生长和次生生长，成熟根的结构以次生结构为主，次生生长主要依靠维管形成层和木栓形成层的活动来完成。

The cork cambium originated from pericyclic cells that resumed their dividing capabilities.

其木栓形成层由中柱鞘细胞恢复分裂能力而形成。

A tissue produced inwardly by the cork cambium.

栓内层在内部由软木新生层产生的组织.

Active rule of cork cambium is different in different trees, so form the many types of bark.

由于木栓形成层活动的规律不同，所以出现有各种各样的树皮。

The secondary growth mainly relied on activities of vascular cambium and cork cambium.

次生生长主要是依靠维管形成层和木栓形成层的活动来完成。

About 15 days after girdling, a cork cambium developed near the surface of callus, then developed normal periderm rapidly.

大约15天左右在愈伤组织近表面细胞中发生木栓形成层，以后迅速形成正常的周皮。