形成层

In roots it may also be called plerome.

原形成在根中也被可称为中柱原。

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

初生质部的成分，最早由原形成形成。

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

形成的向顶分化像初生根伸长一样在继续行。

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

间形成是位于茎的维管间的具有旺盛分裂能力的一细胞。

The differentiation of the cells derived from the primordial meristem forms protoderm,ground meristem and adsperse procam-bium strand.

其衍生细胞分化为原表皮、基本分生组织和散生的原形成。

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

本植物中的茎或根中栓形成外方的全部组织，称为树皮。