生物技术通报 ›› 2016, Vol. 32 ›› Issue (12): 137-142.

• 研究报告 • 上一篇    下一篇

抗锌细菌ZS2的分离鉴定及抗金属特性研究

瞿佳1,赵玲侠1,沈讷敏2,孙晓宇1,陈锐1,路鹏鹏1,乔雪丽3,沈卫荣1   

  1. 1. 陕西省微生物研究所微生物资源中心,西安 710043;
    2. 西安市疾病预防控制中心,西安 710043;
    3. 西安工程大学环境与化学工程学院,西安 710048
  • 收稿日期:2016-03-29 出版日期:2016-12-25 发布日期:2016-12-07
  • 作者简介:瞿佳,女,硕士,研究实习员,研究方向:资源环境微生物的研究与应用;E-mail:q_jia@163.com
  • 基金资助:
    陕西省科学院青年人才培养专项(2014K-34)

Isolation,Identification and Heavy Metal-resistance Characteristics of a Zn-resistant Bacterium,Pseudochrobactrum sp. ZS2

QU jia1,ZHAO Ling-xia1,SHEN Ne-min2,SUN Xiao-yu1,CHEN Rui1,LU Peng-peng1,QIAO Xue-li3,SHEN Wei-rong1   

  1. 1. Microbial Resource Center,Microbiology Insititute of Shaanxi,Xi’an 710043;
    2. Xi’an Center for Disease Control and Prevention,Xi’an 710043;
    3. College of Environmental & Chemistry Engineering,Xi’an Polytechnic University,Xi’an 710048
  • Received:2016-03-29 Published:2016-12-25 Online:2016-12-07

摘要: 筛选可有效降解矿区土壤重金属的抗性细菌,在土壤环境的生物修复中应用前景广阔。从陕西商洛铅锌矿重金属污染土壤中筛选获得一株对重金属锌有高抗性的菌株,命名为ZS2。通过形态特征、生理生化特性及16S rRNA序列分析,初步鉴定该菌为不解糖假苍白杆菌(Pseudochrobactrum asaccharolyticum)。研究其抗重金属及重金属吸附特性,结果表明:ZS2对Zn2+具有较高抗性,最大耐受浓度20 mmol/L,且对多种重金属(Pb2+、Cu2+、Cr6+和Cd2+)也具有耐受性;对低浓度Zn2+去除效果最佳,Zn2+浓度为2.0 mmol/L时吸附率高达55.25%;同时对高浓度Zn2+仍具有去除作用。不解糖假苍白杆菌ZS2是鲜有的抗重金属假苍白杆菌属细菌,具有优良的修复土壤重金属污染应用价值。

关键词: 抗锌细菌, 重金属抗性, 分离鉴定, 生物吸附

Abstract: Screening of resistant bacterium is beneficial to degradation of heavy metal and bioremediation of soil. A zinc-resistant strain,named ZS2,was isolated from metal-polluted soil in a lead-zinc mining area in Shangluo,Shaanxi province and identified as Pseudochrobactrum asaccharolyticum based on the analysis of its physical and biochemical characteristics and its 16S rRNA gene sequence. Studying the resistance of heavy metals and Zn2+adsorption,the results showed that ZS2 has high Zinc-resistance and maximum tolerable is 20 mmol/L. The ZS2 also could grow in a variety of single and combined heavy metals(Pb2+、Cu2+、Cr6+、Cd2+)and have obvious removal effects of low Zn2+ concentration. When the concentrations of zinc was 2.0 mmol/L,the removal efficiency could reach 55.25%. The results indicated that ZS2 is a rare strain with heavy metal resistance from Pseudochrobactrum genus and have excellent application value to remediate heavy metal contaminated soil.

Key words: zinc-resistant bacterium, heavy metals-resistance, identification, biosorption

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