生物技术进展 ›› 2015, Vol. 5 ›› Issue (2): 137-141.DOI: 10.3969/j.issn.2095-2341.2015.02.11

• 研究论文 • 上一篇    下一篇

Gordonia sp. LAM0048的分离鉴定及其降解正十六烷的研究

陈小蓉1,2,3,阮志勇2,3*,王彦伟2,王慧敏2,郭翔2,孔德龙2,邵承斌1*   

  1. 1.重庆工商大学环境与生物工程学院, 重庆 400060; 2.中国农业科学院农业资源与农业区划研究所, 农业部农业微生物资源收集与保藏重点实验室, 北京 100081; 3.农业部农村可再生能源开发利用重点实验室, 成都 610041
  • 收稿日期:2015-01-22 出版日期:2015-03-25 发布日期:2015-02-06
  • 通讯作者: 邵成斌,研究员,主要从事环境微生物学研究。E-mail:shao56@126.com;阮志勇,助理研究员,主要从事农业微生物资源及利用研究。E-mail:ruanzhiyong@caas.cn
  • 作者简介:陈小蓉,硕士研究生,主要从事环境微生物学研究。E-mail:chxiaorou@163.com。
  • 基金资助:
    农业部农村可再生能源开发利用重点实验室开放课题基金项目(201302);环境污染防治技术创新团队基金项目(670100656)资助。

Research on the Isolation, Identification and N-hexadecane Biodegrading Characteristics of Gordonia sp. LAM0048

CHEN Xiao-rong,, RUAN Zhi-yong, WANG Yan-wei, WANG Hui-min, GUO Xiang, KONG De-long, SHAO Cheng-bin   

  1. 1.College of Environmental and Biological Engineering, Chongqing Technology and Business University, Chongqing 400067, China; 2.Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; 3.Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu 610041, China
  • Received:2015-01-22 Online:2015-03-25 Published:2015-02-06

摘要: 以正十六烷为唯一碳源,从长期受石油污染的土壤中筛选到一株高效降解正十六烷的菌株LAM0048。通过形态学观察、生理生化试验、细胞化学组分分析、16S rRNA基因序列分析、细胞脂肪酸和极性脂试验,确定其属于棒杆菌亚目(Corynebacterineae)、诺卡菌科(Nocardiaceae)、戈登氏属(Gordonia),且可能为戈登氏属的一株新种。采用单因素实验对菌株LAM0048在无机盐培养基中降解正十六烷的降解率进行初步探讨,发现该菌株能在以正十六烷为唯一碳源的培养基中生长,菌株LAM0048能够在36 h内完全降解0.05%(V/V)的正十六烷,当烷烃浓度达到1.0%(V/V)时,降解率达46.4%。结果表明LAM0048是一株具有耐受高浓度烷烃的石油降解菌,在石油污染环境的微生物修复中具有一定的应用潜力。

关键词: Gordonia sp., 正十六烷, 降解, 分离鉴定, 高耐受性

Abstract: An n-hexadecane-degrading bacterium LAM0048 was isolated from hydrocarbon-polluted soil by using n-hexadecane as sole carbon source. Based on analyses of the morphological, physiological and biochemical character, cellular chemical composition, 16S rRNA sequences, strain LAM0048 was suggested to represent a member of the genus Gordonia of family Nocardiaceae, suborder Corynebacterineae. Comparative analysis of the fatty acids and polar lipid composition revealed that LAM0048T was a novel species within the genus Gordonia. Study on the degradation efficiency of strain LAM0048 with different n-hexadecane concentration indicated that strain LAM0048 was able to degrade 100% of n-hexadecane in the mineral medium containing 0.05% (V/V) n-hexadecane after 36 h incubation at 30℃, and was able to degrade 46.4% of n-hexadecane in the mineral medium containing 1.0% (V/V) n-hexadecane. The new isolate was an alkane-degrading bacterium with highly concentration of alkane tolerance ability,and may provide new insight into microbial degradation of alkane.

Key words: Gordonia sp., n-hexadecane, alkane degradation, isolation and identification, high tolerance