草甘膦降解菌的分离及其降解效能研究

Screening and Isolation of Bacteria Degrading Herbicide Glyphosate and Its Degradation Efficiency

从受草甘膦污染严重的土壤中富集、筛选并分离到1株降解菌G1,采用室内测定方法,对该菌株的生物学特性、对草甘膦的降解效能及对草甘膦的耐受性进行了初步研究。结果表明,菌株G1能以草甘膦作为惟一的碳源生长。在含有草甘膦的培养基上其降解率达71.76%,最适抗草甘膦浓度为300mmol/L,对草甘膦的抗性浓度在500mmol/L以下。

Glyphosate is commonly used as an organophosphate herbicide in the world.But the continuous usage of the herbicide will pollute environment seriously.Biodegradation is an effective way of bioremedying the polluted soil.One strain capable of degrading herbicide glyphosate was screened and isolated from the glyphosate polluted soil.The strain G1 was selected and primarily studied.The results showed that glyphosate could be used as the sole carbon source of G1,and the degradation rate of G1 were 71.76%.G1 could grow exuberantly in glyphosate solution of 300 mmol/L,but it would be restrict when the glyphosate solution was above 500 mmol/L.