淤泥优势菌对手性农药2,4-滴丙酸甲酯的对映体选择性降解  

Enantioselective Degradation of 2,4-Dichlorprop Methyl Ester by Sediment Bacteria

作　　者：马云[1] 徐超[1] 陈胜文[1] 文岳中[1] 刘维屏[1] 

机构地区：[1]浙江大学环境科学研究所,杭州310029

出　　处：《环境科学》2005年第4期152-155,共4页Environmental Science

基　　金：国家自然科学基金资助项目(30270767);国家杰出青年基金资助项目(20225721)

摘　　要：考察了手性农药2,4-滴丙酸甲酯(DCPPM)生物降解过程中的对映体选择性,通过驯化、培养分离了1株对其具有降解能力的菌株DP,并且运用手性毛细管气相色谱测定了DCPPM在降解过程中的对映体分数(EF),评价了DCPPM在水相中的对映体选择性生物降解.研究表明在菌株DP接种过的介质中,2个对映异构体均被迅速降解,但是R型DCPPM的逸散速度明显快于相对应的S型;EF值发生了显著的偏离,从一开始的0·5变化到最后的1.证实了该菌种对DCPPM的降解存在着对映体选择性.Enantioselective Degradation of 2,4-Dichlorprop methyl ester was studied by sediment bacteria.One DCPPM-degrading bacteria stain was isolated from contaminated sediments. The EF values were determined by chiral GC. The enantioselectivity of DCPPM biodegradation in aquatic phases were evaluated. Incubation with DCPPM-degrading bacteria show that the R enantiomer was preferentially degraded over the corresponding S enantiomer of DCPPM. The EF values show a much higher deviation. It indicate that the microbial degradation of DCPPM was enantioselectivety.

关 键 词：2 4-滴丙酸甲酯 对映体选择 生物降解 淤泥 

分 类 号：X172[环境科学与工程—环境科学]