文献类型： 外文期刊
作者： Dan, Dong 1 ; Zhang, Dian-peng 1 ; Liu, Wei-cheng 1 ; Lu, Cai-ge 1 ; Zhang, Tao-tao 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Biocontrol Microbes Lab, Inst Plant & Environm Protect, Beijing 100097, Peoples R China
关键词： Bacterial diversity;Mo-he;Permafrost soil
期刊名称：INDIAN JOURNAL OF MICROBIOLOGY （ 影响因子：2.461； 五年影响因子：2.259 ）
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收录情况： SCI
摘要： The permafrost soil of Mo-he in Northeast China presents a typical cold environment colonized by psychrophilic microorganisms. This study is aimed at assessing the bacterial communities of permafrost soil of Mo-he in China by sequencing the 16S rRNA genes and Mothur analysis. PCR products with universal 16S rRNA gene primers were cloned and partially sequenced, and bacterial identification at the species was performed by comparative analysis with the GenBank/EMBL/DDBJ database. A total of 266 clones were obtained with the average length of 1,050 bp. Mothur analysis showed that the coverage value of clone library was 53.78 %, Shannon diversity (H) was 4.03, Simpson diversity value was 0.018, and 74 operational taxonomic units were generated. Through phylogenetic assignment using BLASTN by more than 97 % similarity, a total of 87 tentative taxa were identified. The majority of bacterial sequences recovered in this study belonged to the Acidobacteria, Proteobacteria, Verrucomicrobia, Bacteroidetes, Chloroflexi and Chlorobi. Among them, Acidobacteria are dominant community,accounting for 30.1 % of total bacteria, followed by Proteobacteria which accounted for 22.2 %. This result reflected the acidic characteristics of the permafrost soil of which pH value was 6.0. Our study indicated that the permafrost soil of Mo-he in China has a high diversity of bacteria and represents a vast potential resource of novel bacteria. As far as we knew, this is the first report on bacterial diversity of permafrost soil of Mo-he in China.
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