随着转基因植物的推广应用,人们越来越关心其生态安全性。应用ICP-MS测定了转基因棉花及其亲本苗期各个器官中重金属Cr,As,Cd和Pb的含量。结果显示,棉花不同器官中重金属的含量差异较大,含量顺序分别是:根系>叶片>茎部。双价转基因(Bt+CpTI)抗虫棉叶片、茎部和根系中As、Cd都低于常规棉亲本;Cr在地上部两个器官低于对照,但是在根系累积增加;Pb在叶片和根系都高于对照,但是茎部下降。

With the rapid development of transgenic plant,more and more attention has been paid to its ecological safety.Dual-toxin transgenic (Bt+CpTI) cottons and regular cotton were studied by ICP-MS to detect the concentration of heavy metals.The results showed that the sequence of concentration of heavy metals is root>leaf>stem in cotton;the transgenic cotton accumulated less Cd and As than regular cotton in all the organs;and the content of Cr in leaf and stem of transgenic cotton was lower than that in regular cotton, while the content of Pb was lower only in stem.All the data showed that the insertion of foreign gene (Bt) might change the absorbing dynamics of most heavy metal.The reason for this change should be studied further.