The results showed that the root hair zone was the most susceptible region.
结果表明，西瓜幼苗根毛区是枯萎病菌最易侵染的部位。
Cells of middle elongation zone and root hair zone were also labelled by many gold particles.
伸长区中部及根毛区细胞也有较多的金颗粒标记。
Secondary structure occurs in the root hair zone, and vascular cambium is formed from the parenchyma cells between the primary xylem and primary phloem;
次生结构发生于根毛区，维管形成层由初生木质部和初生韧皮部之间的薄壁细胞转化形成；
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