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一株菲降解细菌的分离鉴定及其特性

祝儒刚1;钟鸣1;周启星2;刘海宁1;李玉双1   

  1. 1沈阳农业大学辽宁省农业生物技术重点实验室, 沈阳 110161;
    2中国科学院沈阳应用生态研究所陆地生态过程重点实验室, 沈阳 110016
  • 收稿日期:2005-11-03 修回日期:2006-08-24 出版日期:2006-11-18 发布日期:2006-11-18

Isolation and identification of a phenanthrene-degrading bacterial strain

ZHU Rugang1; ZHONG Ming1; ZHOU Qixing2; LIU Haining1;LI Yushuang1   

  1. 1Key Laboratory of Agricultural Biotechnology of Liaoning Province, Shenyang Agricultural
    University, Shenyang 110161, China;
    2Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese
    Academy of Sciences, Shenyang 110016, China
  • Received:2005-11-03 Revised:2006-08-24 Online:2006-11-18 Published:2006-11-18

摘要: 通过选择性富集培养,从沈抚灌区石油污染土壤中分离到1株菲降解细菌.试验证明该菌株能以菲为唯一碳源和能源生长.经形态学、生理生化鉴定和16S rRNA基因序列比对分析,确定该菌株属于不动杆菌属,命名为Acinetobacter sp. L2. 系统发育进化分析发现,L2菌株与Acinetobacter sp. DG880[AY258108]亲源关系最近.L2菌株培养7 d后对菲的降解率达96.3%.邻苯二酚2,3-双加氧酶活力测定表明,L2菌株可能含有菲降解基因.

关键词: 河流有机碳, 陆地生态系统, 全球碳循环, 流域侵蚀, 14C, 人类活动

Abstract: Through selective enriched culture, a phenanthrene-degrading bacterial strain was isolated from the oil-contaminated soil in Shenfu irrigation area of Shenyang, Northeast China. The morphological and physiological-biochemical identification, 16S rDNA sequence analysis, and phylogenetic study showed that this strain was belonged to genus Acinetobacter and named as Acinetobacter sp. L2, and closest to Acinetobacter sp. DG880[AY258108]. It could use phenanthrene as the sole carbon source. After 7 days culture, the degradation rate of phenanthrene was 96.3%. According to the activity of catechol 2,3-dioxygenase, the strain probably had phenanthrene-degrading genes.

Key words: Riverine organic carbon, Terrestrial ecosystem, Global carbon cycle, Drainage erosion, Radiocarbon, Anthropogenic activities