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冰川冻土 ›› 2014, Vol. 36 ›› Issue (1): 222-229.doi: 10.7522/j.issn.1000-0240.2014.0028

• 寒旱区生物学 • 上一篇    下一篇

祁连山疏勒河上游芨芨草根际可培养细菌群落特征研究

杨秀丽1, 张宝贵2, 张威2, 刘光琇2, 陈拓2, 薛林贵1   

  1. 1. 兰州交通大学 化学与生物工程学院, 甘肃 兰州 730070;
    2. 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
  • 收稿日期:2013-09-07 修回日期:2013-12-29 出版日期:2014-02-25 发布日期:2014-03-18
  • 通讯作者: 薛林贵,E-mail:Xuelg@mail.lzjtu.cn E-mail:Xuelg@mail.lzjtu.cn
  • 作者简介:杨秀丽(1987-),女,甘肃金昌人,2011年毕业于天水师范学院,现为兰州交通大学在读硕士研究生,主要从事环境微生物研究
  • 基金资助:

    国家重点基础研究发展计划(973计划)项目(2012CB026105);国家自然科学基金项目(30800154;31170465;31100365)资助

Characteristics of cultivable bacterial community in rhizosphere soil of Achnatherum splendens Trin in the upper reaches of the Shule River, Qilian Mountains

YANG Xiuli1, ZHANG Baogui2, ZHANG Wei2, LIU Guangxiu2, CHEN Tuo2, XUE Lingui1   

  1. 1. School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
    2. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2013-09-07 Revised:2013-12-29 Online:2014-02-25 Published:2014-03-18

摘要:

以疏勒河上游不同海拔芨芨草根际土壤样品为研究对象,研究了不同海拔土样中细菌分布特征及其影响因素. 结果表明:研究区域芨芨草根际土壤可培养细菌种群密度变化范围为1.7×107~10.8×107 CFU·g-1,平均值为6.4×107 CFU·g-1,随海拔的升高呈先下降后上升的趋势;可培养细菌数量与土壤全氮、脲酶、蔗糖酶含量呈极显著正相关关系,与有机碳、磷酸酶含量呈显著正相关关系;同时,pH值也是影响细菌数量与多样性的一个重要因素. 通过16S rDNA基因测序及构建系统发育树,研究区域可培养细菌归类为15个属,其中芽孢杆菌属和假单胞菌属为优势菌属.

关键词: 疏勒河上游, 芨芨草, 根际细菌, 土壤理化性质, 系统发育树

Abstract:

In this study, the bacterial distribution and diversity in rhizosphere soil of Achnatherum splendens Trin changing with altitude in the upper reaches of Shule River were studied. The study results show that the number of cultivable bacteria varied between 1.7×107 -10.8×107 CFU·g-1, with an average of 6.4 ×107 CFU·g-1; there was a tendency that the number of cultivable bacteria decreased first and then increased; there was a significantly positive correlation between the number of cultivable bacteria and soil total nitrogen, urease and sucrose; the relationship between the number of cultivable bacteria and organic carbon and phosphatase was positive too; pH was a negative factor, which influences the number of cultivable bacteria and the diversity of bacteria. Based on 16S rDNA gene sequences and the phylogenetic tree, the cultivable bacteria in the study area include 15 genera, of which Pseudomonas and Bacillus genus are the dominate bacteria.

Key words: upper reaches of the Shule River, Achnatherum splendens Trin, rhizosphere bacteria, soil physic-chemical properties, phylogenetic tree

中图分类号: 

  • Q938.1