铅胁迫对蔬菜根系形态的影响研究

The effect of Lead stress on root morphology of vegetable

通过营养液培养试验,铅胁迫对3种蔬菜根系生物量及根系形态影响表现为低浓度下(≤1mg/L)的促进作用,随着处理浓度的提高(﹥2mg/L),根系生物量及根长,根表面积,根体积均随之下降,抑制了根系的生长与发育。

Study was carried out by hydroponic culture, the result showed that the root morphology of three kinds of vegetable was promoted when Lead concentration less than 1mg/L, with the increasing of the treatment concentration, Pb toxicity to vegetable crop gradually showed, and resulted in the inhibition of roots development. Root tip became black, the number of lateral root and root hair decreased, radical length,root surface area,root volume decreased, leafs became yellow and easily fell off.