转基因植物修复重金属污染土壤研究进展

Phytoremediation of Heavy Metal Polluted Soils with Transgenic Plants

通过基因工程技术提高植物对金属的耐性,增加金属在植物体内的累积被认为是进行污染土壤生态恢复以及减少食物链金属污染的一条切实可行的有效途径。随着细胞和分子水平上对金属在植物体内的新陈代谢机理的认识及相关基因的不断鉴定,应用转基因技术提高植物对重金属的耐性和积累量的研究已取得了一些进展。本文就近年来分子水平上植物体内金属新陈代谢机理及基因技术在植物修复重金属污染方面的研究进展进行综述。

With the use of genetic engineering technology, it is feasible to manipulate a plant＇s capacity to tolerate, accumulate and metabolize metal pollutants, and hence create ideal plants for environmental cleanup, If we know which molecules are involved in these tolerating and accumulating processes, and which genes control these mechanisms, we can manipulate them to our advantage. This review aims to give a succinct overview of plants＇ metal tolerance and accumulation mechanisms, to identify possible strategies for genetic engineering of plants for metal phytoremediation, and to present an introduction to what has been achieved so far regarding manipulation of metal metabolism in plant.