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《Chinese Journal of Pesticide Science》 2011-04
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Isolation,identification and characterization of a Shewanella hafniensis strain capable of degrading imazethapyr

CHEN Yu-jie1,2,SHU Chang-long2,LIU Xin-gang2,MEI Xiang-dong2,ZHANG Hao1,SONG Fu-ping2,ZHANG Jie*2(1.College of Environment and Resources,Jilin Agricultural University,Changchun 130118,China;2.State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China)  
One strain of imazethapyr-degradable bacterium named P14 was isolated from the sludge of imazethapyr production plant by high pressure enrichment method.Classification was determined by analysis of morphological,physiological and biochemical characters and sequencing of 16S rDNA for P14 strain.P14 strain was identified as Shewanella hafniensis.Degradation performance was investigated preliminary,in the mineral salt medium with imazethapyr as sole carbon source.The optimal parameters for P14 strain to degrade imazethapyr up to 92% within 3 d were at 30 ℃,pH 6.0,inoculated by 7%,and at 100 mg/L imazethapyr.After other carbon source added,the degradation ratio of P14 to imazethapyr was decreased.It's found that sodium citrate was not likely to affect the degradation ratio compared with other carbon sources.
【Fund】: 国家高技术研究发展计划(863计划)项目(2011AA10A203);; 长春市国际科技合作项目(09GH14)
【CateGory Index】: TQ457.29
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