Characterization of a novel cyfluthrin-degrading bacterial strain Brevibacterium aureum and its biochemical degradation pathway

Bioresource Technology
Shaohua ChenLian-Hui Zhang

Abstract

Brevibacterium aureum DG-12, a new bacterial strain isolated from active sludge, was able to degrade and utilize cyfluthrin as a growth substrate in the mineral medium. Response surface methodology using central composite rotatable design of cultural conditions was successfully employed for optimization resulting in 88.6% degradation of cyfluthrin (50mgL(-1)) within 5days. The bacterium degraded cyfluthrin by cleavage of both the carboxylester linkage and diaryl bond to form 2,2,3,3-tetramethyl-cyclopropanemethanol, 4-fluoro-3-phenexy-benzoic acid, 3,5-dimethoxy phenol, and phenol, and subsequently transformed these compounds with a maximum specific degradation rate, half-saturation constant and inhibition constant of 1.0384day(-1), 20.4967mgL(-1), and 141.9013mgL(-1), respectively. A novel degradation pathway for cyfluthrin was proposed based on analysis of these metabolites. In addition, this strain was found capable of degrading a wide range of synthetic pyrethroid insecticides. Our results suggest that B. aureum DG-12 may be an ideal microorganism for bioremediation of the pyrethroid-contaminated environments.

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Citations

Jan 27, 2016·Environmental Science and Pollution Research International·Chunyan LiChuanzeng Lan
Nov 16, 2014·Applied Microbiology and Biotechnology·Ying XiaoGuohua Zhong
Apr 30, 2015·Environmental Science and Pollution Research International·Aixing TangYingjun Wei
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Feb 11, 2018·Environmental Science and Pollution Research International·Jiewei TianYongqiang Tian
Feb 20, 2018·Frontiers in Microbiology·Hui ZhanShaohua Chen
Oct 31, 2018·Applied Microbiology and Biotechnology·Tengzhou WangXizhi Shi
Mar 5, 2020·Journal of Basic Microbiology·Masoud KhajezadehFarshid Kafilzadeh
Dec 23, 2016·FEMS Microbiology Letters·Sarfraz HussainGunjan Pandey
Feb 13, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ziqiu LinShaohua Chen
Apr 16, 2020·Frontiers in Microbiology·Wenping ZhangShaohua Chen
Apr 1, 2020·Frontiers in Microbiology·Yanmei FengShaohua Chen
Jun 9, 2020·Frontiers in Microbiology·Shimei PangShaohua Chen
Aug 21, 2019·Frontiers in Microbiology·Pankaj BhattShaohua Chen
Aug 21, 2019·Frontiers in Microbiology·Yaohua HuangShaohua Chen
Jul 30, 2020·The Science of the Total Environment·Cheng ZhangLusheng Zhu

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