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一株阿特拉津降解菌的分离鉴定及降解特性
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国家自然科学基金项目(No. 31070099); 土壤与农业可持续发展国家重点实验室开放基金(No. Y052010025)


Isolation, identification and characterization of an atrazine-degrading strain
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    摘要:

    从农药厂废水处理池的活性污泥中分离到一株阿特拉津降解菌X-4, 根据其生理生化特性和16S rRNA基因序列相似性分析, 将其初步鉴定为节杆菌属(Arthrobacter sp.)。该菌能以阿特拉津为唯一碳氮源生长, 42 h内对100 mg/L的阿特拉津降解效果为95.7%, 降解阿特拉津的最适温度为30 °C, pH为7.0。该菌对多种重金属离子都存在抗性, 显示了其在去除阿特拉津和重金属复合污染方面的应用潜力。对其降解基因的初步研究显示, 该菌含有trzN、atzB和atzC 3个阿特拉津降解相关基因。

    Abstract:

    A bacteria strain X-4 capable of degrading atrazine was isolated from the activated sludge from the wastewater treating system of an atrazine manufacturer. It was preliminarily identified as Arthrobacter sp. according to its physiological & biochemical characteristics and the analysis of its 16S rRNA gene sequence. This strain could use atrazine as sole carbon and nitrogen source, and degrade 95.7% of 100 mg/L atrazine within 42 h. The optimal pH and temperature for the degradation were 30 °C and pH 7.0, respectively. Strain X-4 could tolerate many kinds of heavy metals, which showed its potential in treating the co-contamination of atrazine and heavy metals. The atrazine-degrading related genes of strain X-4 were the combination of trzN, atzB and atzC.

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闫彩芳,娄旭,洪青,李顺鹏. 一株阿特拉津降解菌的分离鉴定及降解特性[J]. 微生物学通报, 2011, 38(4): 493-497

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