微生物抗重金属的生理机制  

The Physiological Mechanism of Microbial Heavy Metals Tolerance

作　　者：陈亚刚[1] 陈雪梅[1] 张玉刚[1] 龙新宪[1] 

机构地区：[1]华南农业大学资源环境学院,广州510642

出　　处：《生物技术通报》2009年第10期60-65,共6页Biotechnology Bulletin

基　　金：NSFC-广东联合基金(U0833004)

摘　　要：虽然环境中高浓度的重金属对微生物有毒害作用,但一些微生物表现出抗重金属的特性,在细胞结构、生理代谢和遗传水平方面形成了不同的抗性机制。主要从生物吸附、胞外沉淀、生物转化、生物累积和外排作用等5个方面阐述了微生物对重金属抗性的生理和分子机制,为重金属污染环境的生物修复提供理论依据。High concentrations of heavy metals in the environment are toxic to microorganisms, some of which showed heavy metals tolerance in cell structure, with different mechanism of resistances in physiological metabolism and genetic. In this paper, physiological and molecular mechanisms of microbial heavy metals tolerance were expatiated, from the aspect of bioabsorption, extracellular,pre- cipitation, biotransformation, bioaccumulation and exclusion, providing a theoretical basis for the bioremediation of the environment contaminated by heavy metals.

关 键 词：抗重金属 生物吸附胞外沉淀 生物转化 生物累积 外排作用 

分 类 号：Q935[生物学—微生物学]