| 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 |
| 摘要点击 7382 全文点击 3666 投稿时间：2004-10-16 修订日期：2004-11-24 |
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| 中文关键词 2,4-滴丙酸甲酯 对映体选择 生物降解 淤泥 |
| 英文关键词 dichlorprop methyl ester enantioselectivity biodegration sediment |
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| 中文摘要 |
| 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. |
| 英文摘要 |
| 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. |
