摘要
植物提取修复技术是一项既经济又环保的土壤镉(Cd)污染修复技术,该技术的关键是筛选Cd超积累植物或利用基因工程手段改良植物以提高其Cd积累能力。人们已发现遏兰菜等7种Cd超积累植物及美人蕉等潜在的Cd超积累植物。还发现了许多与Cd耐受和积累能力有关的基因:(1)编码与Cd积累、耐受有关酶的基因,如细菌中的ACC(1-aminocyclopropane-1-carboxylic acid),植物中的PCS(Phytochelatin Synthase)基因;(2)编码金属结合蛋白的基因:MT(Metallothionein)、转运蛋白(P-type ATPase、ABC型转运器)基因;(3)其它相关基因:Hvhsp17、PvSR2(Phaseolus vulgaris stress-related gene number 2)等。并将其中的一些基因转入到其它生物中,提高了其对Cd的耐受性和积累量,为实现Cd污染土壤修复的目标奠定基础。
Phytoextraction is an economic and environment-protected remediation technique of Cd-contaminated soils. The key is to screen Cd-hyperaceumulators or enhance the ability of Cd-accumulation by genetic engineering. Seven Cd-hyperaecumulators and some potential Cd hyperaccumulators have been discovered. In addition, genes related with Cd accumulation in different organisms were studied. These genes included：（1）genes encoding Cd accumulation related enzymes, such as ACC of bacterial, PC synthase of plants;（2）genes encoding metal-ehelatin, such as MT（Metal- lothionein）, transport protein ; （3） other genes, such as Hvhsp 17, PvSR2 （ Phaseolus vulgaris stress-related gene number2）. Some of these genes have been transformed to plants and microorganisms to enhance their cadmium tolerance and accumulation,which provides a new way for realizing the aim of remediation of Cd-contaminated soils.
出处
《广西植物》
CAS
CSCD
北大核心
2009年第5期658-663,702,共7页
Guihaia
基金
山东省优秀中青年科学家科研奖励基金(2007BS06014)
山东省农业科学院青年基金~~
关键词
镉污染
镉超积累植物
转基因植物
金属硫蛋白
转运蛋白
Cd-contamination
Cd-hyperaccumulator
transgenic plant
metallothionein（MT）
transport protein
