一株新耐冷菌SA-8降解有机磷农药的研究  

Research on Biodegradation of Organophosphorus Insecticide by a Novel Psychrotrophic Bacterium SA-8

作　　者：李荷[1] 梁卫驱[1] 吴小映[1] 刘玉焕[1] 

机构地区：[1]中山大学生命科学学院,广东广州510275

出　　处：《中山大学学报（自然科学版）》2004年第3期131-132,共2页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：广东省自然科学基金资助项目(031618);广东省科技计划重点资助项目(C32402)

摘　　要：从东北地区受农药长期污染的土壤中通过富集培养、分离筛选到一株甲基对硫磷高效降解菌SA-8,根据生理生化特征,初步鉴定为邻单胞菌Plesiomonassp 。菌株降解甲基对硫磷的最适温度和pH分别为20℃和7 0,在此条件下培养24h,降解率达93%;当温度位于10℃时,降解率也有66 2%;而在35℃时降解率仅为27 3%。这些结果表明SA-8是一株耐冷有机磷农药降解菌。The bacterial strain, which was isolated from the polluted soil in north-east china, was capable of degrading various organophosphorus pesticides effectively. Strain SA-8 was initially identified as Plesimonas sp. According to its biochemical-physiological characters. The optimal temperature and pH for strain SA-8 growth were 20 ℃ and 7\^0 respectively. The biodegradation rate of methyl-parathion can reach 93% after 24h cultivation in suitable conditions. When the temperature is 10 ℃, its degradation rate is 66\^2%, but only 27\^3% degradation rate at 35℃.The experiment manifested that strain SA-8 is a good psychrotroph.

关 键 词：邻单胞菌 耐冷菌 机磷农药 

分 类 号：S182[农业科学—农业基础科学]