journal6 ›› 2014, Vol. 35 ›› Issue (6): 73-77.DOI: 10.3969/j.issn.1007-2985.2014.06.018

• 生物资源 • 上一篇    下一篇

德夯嗜盐耐盐菌抗菌活性筛选和系统发育

李洪军,肖建青,程金莲,刘荷,钟小娟,易旻,贺建武,刘祝祥,陈义光   

  1. (1.吉首大学生物资源与环境科学学院,湖南 吉首 416000;2.酒鬼酒股份有限公司,湖南 吉首 416000)
  • 出版日期:2014-11-25 发布日期:2014-11-27
  • 通讯作者: 陈义光(1965—),男,湖南新化人,吉首大学生物资源与环境科学学院教授,硕士生导师,主要从事微生物资源与生态研究.
  • 作者简介:李洪军(1978—),男,湖南涟源人,吉首大学生物资源与环境科学学院硕士生,主要从事微生物资源与生态研究
  • 基金资助:

    国家自然科学基金资助项目(31460004,30970007);湖南省重点学科建设资助项目(JSU071312Z01);湖南省高校科技创新团队支持计划(201208Z01)

Screening and Phylogenetic Analysis of Antibiotic-Producing Halophilic and Halotolerant Bacteria from the Dehang Canyon in Hunan China

LI  Hong-Jun, XIAO  Jian-Qing, CHENG  Jin-Lian, LIU  He, ZHONG  Xiao-Juan, YI  Min, HE  Jian-Wu, LIU  Zhu-Xiang, CHEN  Yi-Guang   

  1.  (1.College of Biology and Environmental Sciences,Jishou University,Jishou 416000,Hunan China;2.Jiugui Liquor Co.Ltd.,Jishou 416000,Huana China)
  • Online:2014-11-25 Published:2014-11-27

摘要:以8个敏感菌株作为指示菌,采用琼脂扩散法,对分离自湖南省德夯峡谷(28°15′~28°43′ N,109°30′~109°45′ E)普通非盐环境土壤样品中的294株嗜盐及耐盐细菌进行抗菌活性筛选,并对其中具有较强抗菌活性的菌株进行基于16S rRNA基因序列的系统发育分析.受试菌株中有109株的发酵产物具有抗菌活性(阳性率37.1%),其中5个菌株具有较强抗菌活性(JSM 102030,JSM 102052,JSM 102054,JSM 102066,JSM 102082).基于16S rRNA基因序列的系统发育分析表明,这5个菌株分别属于细菌域(Eubacteria)的3个门(Actinobacteria,Firmicutes,Proteobacteria)中的3个科(Bacillaceae,Halomonadaceae,Nocardiopsaceae)的4个属,菌株JSM 102030属于Halobacillus属,与该属已知种Halobacillus trueperi DSM 10404T的系统发育关系最为密切(序列相似性为99.1%),JSM 102052和JSM 102054属于Halomonas属,与Halomonas alkaliphila 18bAGT的系统发育关系最为密切(序列相似性为98.3%),JSM 102066属于Nocardiopsis属,与其系统发育关系最为密切的是Nocardiopsis prasina DSM43845T (序列相似性为99.3%),JSM 102082与Oceanobacillus属的Oceanobacillus kimchii X50T以99.6%的16S rRNA基因序列相似性聚在一起.研究结果表明,分离自湖南省德夯峡谷普通非盐环境土样的嗜盐及耐盐细菌中存在较高比例的抗菌活性菌株,且这些细菌具有较为丰富的系统发育多样性.

关键词: 普通非盐环境, 嗜盐菌, 耐盐菌, 抗菌活性筛选, 系统发育分析

Abstract: The antimicrobial activity of the fermentation brothes of 294 halophilic and halotolerant bacteria,isolated from ordinary non-saline soils collected from the Dehang Canyon (28°15′~28°43′ N,109°30′~109°45′ E) in Hunan Province,China,was screened using the agar diffusion method employing 8 indicator microorganisms (three Gram-positive bacteria,three Gram-negative bacteria and two fungi).The results showed that,out of 294 strains tested,109 were positive in antimicrobial activity (37.1%),in which 5 strains exhibited strong antimicrobial activity.Then these 5 strains were submitted for 16S rRNA gene amplification and phylogenetic analysis after phenotypic characterization including morphological,biochemical and physiological tests.The results suggested that these 5 strains were members of 4 genera in 3 families (Bacillaceae,Halomonadaceae,Nocardiopsaceae) of 3 phyla (Actinobacteria,Firmicutes,Proteobacteria):strain JSM 102030 belonged to the genus Halobacillus (Firmicutes,Bacillaceae),being most closely to the type strain of Halobacillus trueperi (sequence similarity 99.1%);strains 102052 and JSM 102054 were members of the genus Halomonas (Proteobacteria,Halomonadaceae),being related most closely to the type strain of Halomonas alkaliphila (98.3%);strains JSM 102066 strain JSM 2155017 belonged to the genus Nocardiopsis (Actinobacteria,Nocardiopsaceae),exhibiting 99.3 % 16S rRNA gene sequence similarity to Nocardiopsis prasina DSM43845T;strain JSM 102082 belonged to the genus Oceanobacillus (Firmicutes,Bacillaceae),exhibiting 99.6% 16S rRNA gene sequence similarity to Oceanobacillus kimchii X50T.

Key words: ordinary non-saline environment, halophilic bacteria, halotolerant bacteria, antimicrobial activity, phylogenetic analysis

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