伸长的细胞随后开始分化，形成根毛、导管等不同结构，于是植物的根便发育成熟了。

The elongation cell afterwardsstarts to split up, forms the root hair , the drive pipe and so on thedifferent structure, thereupon plant ' s root then grew maturely.

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共生的固氮菌侵袭宿主植物的根毛，并在此繁殖和促进根瘤的形成、植物细胞和亲密共生细菌的扩大。

Symbiotic nitrogen-fixing bacteria invade the root hairs of host plants, where they multiply and stimulate the formation of root nodules, enlargements of plant cells and bacteria in close association.

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结果表明：根瘤菌可诱发根瘤形成部位根段的根毛增生、形变和根外层传递细胞的发育。

The results showed that the hyperplasy of root hair, root deformation and the development of the root epidermal transfer cells were induced by rhizobia.

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