一株高效降解菌对多菌灵的降解机理  

Degradation Mechanism of a Newly Isolated Effi cient Degrading Bacterial Strain to Carbendazim

作　　者：王玉军[1] 马卉[1] 李业东 王呈玉[1] 李明石[1] 王帅[1] 

机构地区：[1]吉林农业大学资源与环境学院,长春130118 [2]长春市环境保护局净月经济开发区分局,长春130122

出　　处：《农药》2014年第1期49-51,57,共4页Agrochemicals

基　　金：吉林省重大科技攻关专项(20130204054SF)

摘　　要：[目的]研究多菌灵的降解机理。[方法]通过培养试验和紫外光谱法,探讨高效降解菌株对多菌灵的降解性能及降解途径。[结果]所选用的高效菌株Raoultella sp.MBC能够以多菌灵及其降解产物为唯一碳源,在试验条件下培养72 h后,多菌灵的降解率达到100%,紫外光谱表明多菌灵经菌株降解后,分子中咪唑结构中的C=N被破坏。[结论]根据降解产物确定多菌灵的降解途径为多菌灵→2-氨基苯并咪唑→2-羟基苯并咪唑→邻苯二胺,但邻苯二胺并不是最终降解产物。The aim is to study the degradation mechanism of carbendazim. [Methods] The degradation capability and pathways of of a newly isolated strain to carbendazim were investigated by culture experiment and UV spectroscopy. [Results] The results show that Raoultella sp. MBC is a efficient degrading strain which make the carbendazim and its degradation products be the sole carbon source for growth. After 72 h incubation under the experimental conditions, the degradation rate of carbendazim is 100%. UV spectra results show that the C=N bond in imidazole molecule structure is destroyed. [Conclusions] The degration pathway of the newly isolated efficient strain is carbendazim--- 2-aminobenzimidazole--2-hydroxybenzimidazole--O-phenylenediamine, which was identified according to the degradation products. But the O-phenylenediamine was not the final degradation product.

关 键 词：多菌灵 降解产物 紫外光谱 质谱 

分 类 号：X786[环境科学与工程—环境工程] TQ450.2[化学工程—农药化工]