形成层

In roots it may also be called plerome.

原成层根中也被可称为中柱原。

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

初生木质部的成分，最早由原成层成。

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

成层的向顶分化像初生根伸长一续行。

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

成层是位于茎的维管的具有旺盛分裂能力的一层细胞。

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成层。

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

木本植物中的茎或根中木栓成层外方的全部组织，称为树皮。