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	Diversity and distribution of alkaliphilic psychrotolerant bacteria in the Qinghai-Tibet Plateau permafrost region
	Zhang, Gaosen; Ma, Xiaojun; Niu, Fujun; Dong, Maoxing; Feng, Huyuan; An, Lizhe; Cheng, Guodong
刊名	EXTREMOPHILES
	2007-05-01
卷号	11期号:3页码:415-424
关键词	16S rDNA alkaliphilic psychrotolerant bacteria Qinghai-Tibet plateau permafrost
ISSN号	1431-0651
DOI	10.1007/s00792-006-0055-9
通讯作者	Feng, Huyuan(fenghy@lzu.edu.cn)
英文摘要	The Qinghai - Tibet Plateau represents a unique permafrost environment, being a result of high elevation caused by land uplift. And the urgency was that plateau permafrost was degrading rapidly under the current predicted climatic warming scenarios. Hence, the permafrost there was sampled to recover alkaliphilic bacteria populations. The viable bacteria on modified PYGV agar were varied between 10(2) and 10(5) CFU/g of dry soil. Forty-eight strains were gained from 18 samples. Through amplified ribosomal DNA restriction analysis (ARDRA) and phylogenetic analyses, these isolates fell into three categories: high G + C gram positive bacteria (82.3%), low G + C gram positive bacteria (7.2%), and gram negative alpha-proteobacteria (10.5%). The strains could grow at pH values ranging from 6.5 to 10.5 with optimum pH in the range of 9 - 9.5. Their growth temperatures were below 37 degrees C and the optima ranging from 10 to 15 degrees C. All strains grew well when NaCl concentration was below 15%. These results indicate that there are populations of nonhalophilic alkaliphilic psychrotolerant bacteria within the permafrost of the Qinhai-Tibet plateau. The abilities of many of the strains to produce extracellular protease, amylase and cellulase suggest that they might be of potential value for biotechnological exploitation.
收录类别	SCI
WOS关键词	SIBERIAN PERMAFROST ; SEDIMENTS ; SEA ; MICROORGANISMS ; POPULATIONS ; ANTARCTICA ; GENETICS ; ENZYMES ; LIFE ; NOV
WOS研究方向	Biochemistry & Molecular Biology ; Microbiology
WOS类目	Biochemistry & Molecular Biology ; Microbiology
语种	英语
出版者	SPRINGER TOKYO
WOS记录号	WOS:000246353300001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2555967
专题	寒区旱区环境与工程研究所
通讯作者	Feng, Huyuan
作者单位	1.Lanzhou Univ, MOE, Key Lab Arid & Grassland Agrioecol, Sch Life Sci, Lanzhou 730000, Peoples R China 2.CAS, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Gaosen,Ma, Xiaojun,Niu, Fujun,et al. Diversity and distribution of alkaliphilic psychrotolerant bacteria in the Qinghai-Tibet Plateau permafrost region[J]. EXTREMOPHILES,2007,11(3):415-424.
APA	Zhang, Gaosen.,Ma, Xiaojun.,Niu, Fujun.,Dong, Maoxing.,Feng, Huyuan.,...&Cheng, Guodong.(2007).Diversity and distribution of alkaliphilic psychrotolerant bacteria in the Qinghai-Tibet Plateau permafrost region.EXTREMOPHILES,11(3),415-424.
MLA	Zhang, Gaosen,et al."Diversity and distribution of alkaliphilic psychrotolerant bacteria in the Qinghai-Tibet Plateau permafrost region".EXTREMOPHILES 11.3(2007):415-424.

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