应用ICP-MS检测转Bt基因玉米中重金属含量

Application of ICP-MS to the Detection of Heavy Metals in Transgenic Corn

随着转基因食品的推广应用,人们越来越关心其食用安全性。以转基因玉米及其亲本为实验材料,借助于ICP-MS对转基因玉米及其亲本中重金属进行了测定。结果显示,外源基因的整合导致了转基因玉米重金属(Ni,Cu,Cd,As,Cr,Zn和Hg)含量显著低于亲本对照,两对转基因抗虫玉米及其亲本对比结果相似;但是有的重金属(V,Co,Pb)含量与对照相比变化没有明显规律。这些结果说明转Bt基因玉米籽粒中重金属含量会受到Bt基因的影响,但是影响的方向和机理上不清楚,所以转基因技术如果控制不严可能会对玉米的食用安全性产生不良影响,转基因植物的推广应用应当严格审查。具体发生上述变化的原因尚需要进一步研究。

With the rapid development of the transgenic food, more and more transgenic food has been pouring into the market, attracting much attention to the transgenic food＇s edible safety. Transgenic corns and its parents were studied by ICP-MS to detect the heavy metals. The results showed that the transgenic corn accumulated less heavy metals （Ni, Cu, CA, As, Cr, Zn and Hg） than their own parents; and the contents of some heavy metals （V, Co and Pb） in transgenic corns were similar to their parents. All the data showed that the insertion of foreign gene （Bt） might change the absorbing dynamics of most heavy metals, especially some important heavy metals, which are disadvantageous to human health. The present paper indicated that the change in heavy metals absorption could harm the edible safety of transgenic plant. The cause of this change should be studied further.