Dicofol is an organochlorine insecticide widely used to prevent pests worldwide. Consequently, serious environmental problems have arisen from the application of dicofol. Bioremediation is an effective solution for dicofol persistence in the environment. In this study, a bacterial strain D-2, identified to genus Microbacterium, capable of degrading dicofol was isolated from dicofol-contaminated agricultural soil. This represents the first dicofol degrading bacterium isolated from this genus. Microbacterium sp. D-2 degraded 50 mg/L dicofol within 24 h at a rate of 85.1%. Dicofol was dechlorinated by D-2 and the further degradation metabolite was indentified as p,p′-dichlorobenzophenone(DCBP). Soils inoculated with Microbacterium sp. D-2 degraded 81.9% of the dicofol, while soils without D-2 only degraded 20.5% of the dicofol present. This finding suggests that strain D-2 has great potential in bioremediation of dicofol-contaminated soils.

中文翻译：

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三歧杆菌对三氯杀螨醇的生物降解。从受农药污染的农业土壤中分离出的D-2

Dicofol是一种有机氯杀虫剂，在世界范围内广泛用于预防害虫。因此，三氯杀螨醇的使用引起了严重的环境问题。生物修复是三氯杀螨醇在环境中持久性的有效解决方案。在这项研究中，从三氯杀螨醇污染的农业土壤中分离出了一种鉴定为能够降解三氯杀螨醇的，属于微细菌属的细菌菌株D-2。这代表了从该属中分离的第一个三氯杀螨醇降解细菌。微小杆菌 D-2在24小时内降解了50 mg / L三氯杀螨醇，降解率为85.1％。将Dicofol用D-2脱氯，进一步降解的代谢物鉴定为p，p'-二氯二苯甲酮（DCBP）。用Microbacterium sp。接种的土壤。D-2降解了三氯杀螨醇的81.9％，而没有D-2的土壤仅降解了三氯杀螨醇的20.5％。