转基因棉花纤维中重金属和矿质元素含量研究

借助ICP-MS/ICP-AES技术对转基因棉花和对照纤维中的微量元素和重金属进行了系统的研究。转基因棉花纤维中，所测量的15种微量元素中有十种元素含量低于非转基因对照，它们分别是：B，Mg，Mn，Fe，Co，Ni，Cu，Zn，Se和Mo，特别是Zn成倍降低； 而植物中的大量元素Na，Si，P，K和Ca则有所上升，以Si上升最多(2倍多)。在检测的六种重金属(Pb，Cr，Cd，Sb，Tl和As)中转基因抗虫棉花纤维含量都低于亲本对照。上述结果说明外源基因的导入能够显著改变转基因棉花纤维中微量元素和重金属的累积。

Application of ICP-MS to Detection of Mineral Elements and Heavy Metals in Transgenic Cotton Fibre

With the rapid development of transgenic cotton,people begin to focus on its physiology and ecology.The present paper studied the contents of heavy metals and microelements in transgenic cotton fibre by ICP-MS/ICP-AES.The results showed that the contents of most microelements(B,Mg,Mn,Fe,Co,Ni,Cu,Zn,Se and Mo)detected in transgenic cotton fibre were lower those in regular cotton fibre,especially the contents of Zn which was several times lower.But the concentrations of Na,Si,P,K and Ca in transgenic cotton fibre were higher than those of regular cotton fibre,especially for Si.The concentrations of the heavy metals detected(Al,Pb,Cr,Cd,Sb,Tl and As)in transgenic cotton fibre were all lower than those in regular cotton fibre.All the data showed that the accumulation patterns of heavy metals and microelements in transgenic cotton fibre were cianged by the insertion of foreign genes.