钾电极法研究镧对铅、镉伤害植物花粉细胞的缓解作用

Mitigative Effect of La on Pb and Cd to Plant Pollen System

以植物花粉细胞为试验体系,利用K^+离子电极法测定了pb^(2+)、Cd^(2+)对花粉细胞质膜透性的影响及La^(3+)的缓解效应。主要结果为:pb^(2+)、Cd^(2+)在极低浓度时就使花粉细胞质膜透性明显增大,表现为伤害作用;而La^(3+)对花粉细胞质膜透性有明显的降低作用;La^(3+)离子的存在则能显著地降低pb^(2+)、Cd^(2+)的伤害作用。

Mitigative effect of La on Pb and Cd to plant pollen system was studied by using K+ ion eletrode technique. The permeability of pollen plasmalemma is markedly increased when Pb or Cd is in the range of 10-8 to 10-5mol/L, while La3+ can obviously reduce the permeability of plasmalemma pollen. When La3+ and Pb2+ (Cd2+) are all in the medium of pollen system ,La3+ ion has the mitigative effect of La on Pb and Cd to plant pollen system.