利用植物来源铅结合蛋白进行植物修复的研究进展

摘要

Phytoremediation uses plants to remove pollutants including heavy metals from the environ-ment.The roots of the plant channel pollutants residing in soil or water in the environment to above-ground plant tissues for storage.Eventually,these pollutant-containing plant parts can be harvested and properly disposed.Plants thrive by photosynthesis making solar-driven in situ localized phytoremediation a very cost-effective and environmentally-friendly method to rid contaminants.Heavy metals are the unde-sirable products from industries such as mining and manufacturing and they are toxic to both man and ani-mals.It has been reported that transgenic plants can be used to detoxify heavy metals like mercury,cad-mium,arsenate,and selenate from the soil.However,few lead-binding proteins have been isolated from plants.Acyl-CoA-binding proteins (ACBPs)have been demonstrated to bind lead in vitro and in vivo and the potential in using ACBPs for the phytoremediation of lead in transformed plants will be discussed.%植物修复是指利用植物来清除环境中包括重金属在内的污染物。土壤或者水体中的污染物经植物的根转运到植物的地上组织进行贮存，这些含有污染物的植物组织最终可被收割及合理处理。植物可利用太阳光进行光合作用营自养生活的这一特性使得植物修复成为一种经济有效且环保的方法清除污染物。重金属是采矿业和制造业等工业的附属产物，对人类健康有非常严重的毒害作用。据报道，转基因植物可以用来解除土壤中如汞、镉、砷、硒等重金属的毒性，但是目前还没有铅结合蛋白从植物中被分离出来。酰基辅酶 A 结合蛋白（Ac-yl-CoA-binding proteins，ACBPs）已被阐明在体内和体外都能结合铅。因此，本文将论述利用改造植物中的 ACBP蛋白进行植物修复铅的潜能。