Periderm, lenticelle and secondary vascular tissue in the gynophore are produced due to its secondary growth.
次生生长后产生周皮、皮孔和次生维管组织。
The results showed that the taproots of transplanted P. ginseng plants consist of periderm and secondary vascular tissue.
结果表明，移山参主根结构由周皮和次生维管组织组成。
Parenchyma cell is prominent in the secondary vascular tissue, and only small amount of vascular element is scattered in it.
其中以薄壁细胞为主，维管分子少量，分散在薄壁组织中；
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