本文构建了转大蒜金属硫蛋白基因(MT)的工程酵母菌株,其中MT的表达受铜离子或甲醇诱导型启动子调控.工程菌过表达MT可增强菌体对有害重金属离子铅、砷、铬、镉的耐受性,提高细胞对环境有害重金属的适应性;用高表达MT的菌体处理重铬酸钾配制的模拟废水,采用固定化菌体或裸菌处理,发现转MT工程菌对铬离子的去除效果明显好于对照菌,菌体投加量和作用时间对铬离子去除率有明显影响,菌体投加量增加能增强对溶液中铬离
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