title: [Isolation and identification of imazethapyr degradable bacteria and its degradation characteristics].
abstract: One strain of imazethapyr degradable bacteria was isolated from the mixture of imazethapyr production factory's sludge and the soil that was contaminated with imazethapyr for a long time. The strain could degrade imazethapyr more than 90% within 72 h when it grew in 500 mg/L imazethapyr condition. When pH was 5, the bacteria could degrade all the imazethapyr of 500 mg/L in 72 h, but when pH was 8 and 9, only 50% imazethapyr was degraded which showed acid condition was more compatible than that of alkalescency for this bacteria growing. The higher degradation ratio at 25 degrees C and 30 degrees C was observed and the optimum condition for the bacteria to degrade imazethapyr was pH = 5 and 25 degrees C. Characterizing by physiological and biochemical properties as well as 16S rRNA sequence analysis, the strain is related and shared characteristics of the genus Alcaligenes sp.
authors.affiliation: College of Agriculture, Northeast Agricultural University, Harbin 150030, China. dingweing@yahoo.com.cn
authors.forename: Wei
authors.initials: W
authors.lastname: Ding
authors.forename: He
authors.initials: H
authors.lastname: Bai
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Cheng
authors.forename: Juan-Juan
authors.initials: JJ
authors.lastname: Qu
authors.forename: Wei-Jun
authors.initials: WJ
authors.lastname: Xu
mesh_terms: D000421:Alcaligenes / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D001673:Biodegradation, Environmental; D006540:Herbicides / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D009539:Nicotinic Acids / Q000378:metabolism*; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012722:Sewage / Q000382:microbiology*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism; D013696:Temperature
chemical_list: D006540:Herbicides; D009539:Nicotinic Acids; D012336:RNA, Ribosomal, 16S; D012722:Sewage; D012989:Soil Pollutants; C093630:imazethapyr