废水中分离菌株NAP a的萘降解能力及分子系统发育

Chunyang Zhang, Z. Peng
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引用次数: 4

摘要

本研究采用选择性培养基对淄博市张店城市污水处理厂活性污泥中萘降解菌NAP_A进行富集分离。培养和气相色谱分析表明,NAP_A在30℃~35℃和pH7条件下对萘的降解速度较快。克隆并测序了NAP A的16S rRNA基因(EU142847)。根据该序列及其在GenBank数据库中的相关序列进行多序列比对,并用DNAMAN软件构建系统发育树。结果表明,菌株NAP_A位于Ochrobactrum属谱系,与O. pseudintermedium同源性最高(99%),表明该菌株为O. pseudintermedium的成员。这首次揭示了Ochrobactrum菌株能够降解多环芳烃,为该菌株对此类环境污染物的生物处理提供了指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Naphthalene Degradation Capability and Molecular Phylogeny of a Bacterial Strain NAP A Isolated from Wastewater
In the study, a selective medium was used to enrich and isolate a naphthalene-degrading bacterium NAP_A from the activated sludge of Zhangdian Municipal Wastewater Treatment Plant in Zibo, China. Cultivation and gas chromatography analysis showed NAP_A degraded naphthalene fast under 30degC~35degC and pH7. The 16S rRNA gene of NAP A was cloned and sequenced (EU142847). Basing on this sequence and its related sequences in the GenBank database, a multialignment was conducted then a phylogenetic tree was constructed with DNAMAN software. The results showed that strain NAP_A was located in the lineage of Ochrobactrum genus, sharing the highest homology with O. pseudintermedium (99%), which indicated the strain was a member of O. pseudintermedium. This revealed for the first time that Ochrobactrum species could degrade polycyclic aromatic hydrocarbon, which would guide the biotreatment of such environmental contaminant with the bacterium.
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