根冠原：在一些植物中覆盖根顶端分生组织的一层具有分生能力的细胞，根冠原可以产生和维持根冠。

Calyptogen a layer of meristematic cells covering the root apical meristem in some plants (e. g. grasses) that gives rise to and maintains the root cap.

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芽的顶端分生组织与随后产生的根的分生组织共同构成胚状结构，与单子叶植物种子胚相似。

Embryo like structure was found being formed from shoot meristem and root meristem and it was similar with radicle and plumule of the embryo.

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