Characterization of a novel oxyfluorfen-degrading bacterial strain Chryseobacterium aquifrigidense and its biochemical degradation pathway

文献类型： 外文期刊

第一作者： Xu, Jun

作者： Xu, Jun;Dong, Fengshou;Liu, Xingang;Wu, Xiaohu;Zheng, Yongquan;Wu, Yanbing

作者机构：

关键词： Oxyfluorfen;Biodegradation;Chryseobacterium aquifrigidense;Metabolite

期刊名称：APPLIED MICROBIOLOGY AND BIOTECHNOLOGY （ 影响因子：4.813； 五年影响因子：4.697 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Persistent use of the diphenyl ether herbicides oxyfluorfen may seriously increase the health risks and ecological safety problems. A newly bacterium R-21 isolated from active soil was able to degrade and utilize oxyfluorfen as the sole carbon source. R-21 was identified as Chryseobacterium aquifrigidense by morphology, physiobiochemical characteristics, and genetic analysis. Under the optimum cultural conditions (pH 6.9, temperature 33.4 degrees C, and inoculum size 0.2 g L-1), R-21 could degrade 92.1 % of oxyfluorfen at 50 mg L-1 within 5 days. During oxyfluorfen degradation, six metabolites were detected and identified by atmospheric pressure gas chromatography coupled to quadrupole-time of flight mass spectrometry and ultra-performance liquid chromatography coupled to quadrupole-time of flight mass spectrometry, and a plausible degradation pathway was deduced. Strain R-21 is a promising potential in bioremediation of oxyfluorfen-contaminated environments.

分类号： Q939.9`Q81

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