结果表明，移山参主根结构由周皮和次生维管组织组成。
The results showed that the taproots of transplanted P. ginseng plants consist of periderm and secondary vascular tissue.
具有次生结构，次生保护组织为周皮。
It had secondary structure and the secondary protective tissue was periderm.
结果表明：不同直径大小的横走侧根均由周皮、次生维管组织和四原型的初生木质部构成。
The results showed that all the cross branch roots of different sizes consisted of periderm, secondary vascular tissue and tetrarch primary xylem.
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