青藏高原昆仑山垭口不同深度土壤可培养细菌群落特征研究

doi:10.7522/j.issn.1000-0240.2016.0087

冰川冻土 ›› 2016, Vol. 38 ›› Issue (3): 776-784.doi: 10.7522/j.issn.1000-0240.2016.0087

青藏高原昆仑山垭口不同深度土壤可培养细菌群落特征研究

张宝贵^{1 2}, 刘晓娇³, 吴青柏⁴, 刘光琇^{1 2}, 陈拓^{1 2}, 张威^{1 2}, 章高森^{1 2}, 伍修锟^{1 2}, 邓友生⁴

1. 中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室, 甘肃兰州 730000;
2. 中国科学院寒区旱区环境与工程研究所甘肃省极端环境微生物资源与工程重点实验室, 甘肃兰州 730000;
3. 中国科学院寒区旱区环境与工程研究所内陆河流域生态水文重点实验室, 甘肃兰州 730000;
4. 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室, 甘肃兰州 730000

收稿日期:2016-03-15 修回日期:2016-05-05 出版日期:2016-06-25 发布日期:2016-09-21
通讯作者: 刘光琇,E-mail:liugx@lzb.ac.cn. E-mail:liugx@lzb.ac.cn
作者简介:张宝贵(1987-),男,山西忻州人,2013年毕业于中国科学院寒区旱区环境与工程研究所,现为中国科学院寒区旱区环境与工程研究所在读博士研究生,主要从事环境微生物研究.E-mail:zbg2007.cool@163.com
基金资助:
国家基础研究重点发展计划（973计划）项目（2012CB026105）；国家自然科学基金项目（30800154；31170465；31100365）；中科院西部行动计划项目（KZCX2-XB3-03）；冻土工程国家重点实验室开放基金（SKLFSE201308）资助

Research of the soil bacteria community characteristics at different depths in Kunlun Mountains Pass,Tibetan Plateau

ZHANG Baogui^{1 2}, LIU Xiaojiao³, WU Qingbai⁴, LIU Guangxiu^{1 2}, CHEN Tuo^{1 2}, ZHANG Wei^{1 2}, ZHANG Gaosen^{1 2}, WU Xiukun^{1 2}, DENG Yousheng⁴

1. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Science, Lanzhou 730000, China;
2. Key Laboratory of Extreme Environmental Microbial Resources and Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Science, Lanzhou 730000, China;
3. Key Laboratory of Inland Ecohydrology, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Science, Lanzhou 730000, China;
4. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Received:2016-03-15 Revised:2016-05-05 Online:2016-06-25 Published:2016-09-21

摘要/Abstract

摘要： 以青藏高原昆仑山垭口不同深度土壤样品为研究对象，研究了可培养细菌数量及多样性。结果表明：可培养细菌数量与多样性在一定程度上均与土壤深度呈负相关关系。可培养细菌数量以表层土壤最多，而细菌多样性最低。基于16S rDNA基因序列分析共发现了6个门，18个属，21种细菌，其中表层土壤Arthrobacter siccitolerans为绝对优势种，比例达95%；冻土区（0~82.15m）之间不同土样Mycetocola miduiensis菌株所占比例较大；而冻土层以下没有明显的优势菌。冗余分析（RDA）显示：可培养细菌数量主要受土壤有机碳影响，土壤含水量则是影响细菌多样性的主要因素。

关键词: 青藏高原, 昆仑山垭口, 不同深度土壤, 可培养细菌

Abstract: In this study,soil cultivable bacteria number and diversity at different depths in Kunlun Mountains Pass,Tibetan Plateau,were researched. The results showed that both the cultivable bacteria number and diversity index were negatively related to sampling depths to some extent. In the top soil,there was most abundance bacteria but the diversity index was lowest. There were 21 species were isolated by sequencing PCR-amplified 16S rDNA from the soil. These species were affiliated with 18 genera belonging to α-Proteobacyeria,β-Proteobacteria, γ- Proteobacteria,Actinobacteria,Bacteroides and Firmicutes. Among them,Arthrobacter siccitolerans was the most dominant species at the topsoil,with a ratio of 95% approximately. While Mycetocola miduiensis strain had relative high properties in the range between surface and the lower bound of the sampled frozen soil. There was no obvious dominant species beneath the frozen soil in this study. RDA analysis indicated that the cultivable bacteria number was mainly controlled by soil organic carbon,butthe soil water content was the main factor to influence bacteria diversity index.

Key words: Tibetan Plateau, Kunlun Mountains Pass, soil in different depths, cultivable bacteria

中图分类号:

Q938.1+3

张宝贵, 刘晓娇, 吴青柏, 刘光琇, 陈拓, 张威, 章高森, 伍修锟, 邓友生. 青藏高原昆仑山垭口不同深度土壤可培养细菌群落特征研究[J]. 冰川冻土, 2016, 38(3): 776-784.

ZHANG Baogui, LIU Xiaojiao, WU Qingbai, LIU Guangxiu, CHEN Tuo, ZHANG Wei, ZHANG Gaosen, WU Xiukun, DENG Yousheng. Research of the soil bacteria community characteristics at different depths in Kunlun Mountains Pass,Tibetan Plateau[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2016, 38(3): 776-784.

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青藏高原昆仑山垭口不同深度土壤可培养细菌群落特征研究

Research of the soil bacteria community characteristics at different depths in Kunlun Mountains Pass,Tibetan Plateau

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