但表皮和皮层细胞直到根毛区才高度液泡化。
But the more vacuolation of epidermis and cortex appeared in root-hair region.
伸长区中部及根毛区细胞也有较多的金颗粒标记。
Cells of middle elongation zone and root hair zone were also labelled by many gold particles.
结果表明，西瓜幼苗根毛区是枯萎病菌最易侵染的部位。
The results showed that the root hair zone was the most susceptible region.
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