title: Biodegradation of type II pyrethroids and major degraded products by a newly isolated Acinetobacter sp. strain JN8.
abstract: A Gram-negative aerobic bacterium, designated as JN8, was isolated from activated sludge and soil in a pesticides factory in China. It was found that JN8 had a high capacity for degrading a broad range of type II pyrethroids and utilizing these pyrethroids as the sole carbon source for cell growth. The degradation rates of a 100 mg·L(-1) concentration of β-cypermethrin, cypermethrin, fenpropathrin, fenvalerate, and deltamethrin by JN8 in mineral salt medium were 74.1%, 64.9%, 57.9%, 48.1% and 34.9%, respectively. Strain JN8 was identified as a species of Acinetobacter based on its biochemical properties and 16S rRNA sequence analysis. β-Cypermethrin was degraded by JN8 through hydrolysis of the carboxylester linkage to form 3-phenoxybenzoic acid and 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylic acid, both of which could be further degraded by JN8. JN8 is the first strain of an Acinetobacter species in which pyrethoid-degrading activity has been detected, and such a feature makes it a potential resource for disposal of waste and effluent from pyrethroid manufacturing facilities.
authors.affiliation: School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, People's Republic of China.
authors.forename: Zhaoxia
authors.initials: Z
authors.lastname: Jin
authors.forename: Qiong
authors.initials: Q
authors.lastname: Guo
authors.forename: Zongshen
authors.initials: Z
authors.lastname: Zhang
authors.forename: Tongshuai
authors.initials: T
authors.lastname: Yan
mesh_terms: D000150:Acinetobacter / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D001565:Benzoates / Q000378:metabolism; D001673:Biodegradation, Environmental; D007306:Insecticides / Q000378:metabolism*; D058889:Molecular Typing; D009570:Nitriles / Q000378:metabolism; D010802:Phylogeny; D011722:Pyrethrins / Q000378:metabolism*; D012336:RNA, Ribosomal, 16S; D012722:Sewage / Q000382:microbiology; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D001565:Benzoates; D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; D012336:RNA, Ribosomal, 16S; D012722:Sewage; D012989:Soil Pollutants; C069616:3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylic acid; C017618:3-phenoxybenzoic acid
keywords: Acinetobacter sp.; biodegradation; biodégradation; degraded products; isolation; isolement; produits dégradés; pyrethroids; pyréthroïdes