These have adapted to the environment by the development of long taproots that penetrate downward until they approach the assured water supply provided by groundwater.
这类植物通过生长出长长的主根来适应环境，这些主根可以向下渗透，直达地下水提供的充足水源。
2
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。
3
Taproot a persistent primary root that grows vertically downward. Swollen taproots used for food storage are common in many biennial plants, such as carrot (Daucus carota).