形成层

In roots it may also be called plerome.

原形成层在根也被可称原。

Protoxylem The PRIMARY XYLEM elements that are formed from the procambium first.

初生木质部成分，最早由原形成层形成。

Acropetal differentiation of the cambium layer continues as the primary root elongates.

形成层向顶分化像初生根伸长一样在续进行。

Interfascicular cambium A single layer of actively dividing cells between the vascular bundles in stems.

束间形成层是位于维管束间具有旺盛分裂能力一层细胞。

Bark The outermost tissue of the stem and roots in woody plants, on the outside of the phellogen (cork cambium).

木本植物或根木栓形成层外方全部组织，称树皮。