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

作　　者：刘德龙[1] 默丽萍[1] 于先眇 刘凤云[2] 

机构地区：[1]河北师范大学化学系,石家庄050091 [2]河北工业职业技术学院环化系,石家庄050091

出　　处：《化学传感器》2000年第3期47-50,共4页Chemical Sensors

基　　金：河北省教委自然科学基金项目;河北省博士科研基金项目资助

摘　　要：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.

关 键 词：质膜透性 电极法 污染 镧 铅 镉 植物 花粉细胞 

分 类 号：O657.1[理学—分析化学]