[Isolation and identification of imazethapyr degradable bacteria and its degradation characteristics].
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.
Ding
Wei
W
College of Agriculture, Northeast Agricultural University, Harbin 150030, China. dingweing@yahoo.com.cn
Bai
He
H
Cheng
Zhuo
Z
Qu
Juan-Juan
JJ
Xu
Wei-Jun
WJ
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
D006540:Herbicides; D009539:Nicotinic Acids; D012336:RNA, Ribosomal, 16S; D012722:Sewage; D012989:Soil Pollutants; C093630:imazethapyr