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应用DGGE技术分析青藏铁路沿线的土壤细菌种群多样性

李潞滨1;刘振静1;庄彩云1;周金星1;杨凯2;韩继刚3   

  1. 1中国林业科学研究院林业研究所国家林业局林木培育重点实验室, 北京 100091; 2 北京农学院农业应用新技术北京市重点实验室, 北京 102206;3 河北大学生命科学学院, 河北保定 071002
  • 收稿日期:2007-11-12 修回日期:1900-01-01 出版日期:2008-05-10 发布日期:2008-05-10

Population diversity of soil bacteria along the Qinghai-Tibet railway by DGGE analysis.

LI Lu-bin1; LIU Zhen-jing1;ZHUANG Cai-yun;ZHOU Jin-xing;YANG Kai2;HAN Ji-gang3   

  1. 1Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;2Beijing Key Laboratory of New Technology in Agricultural Application, Beijing University of Agriculture, Beijing 102206, China; 3College of Life Sciences, Hebei University, Baoding 071002, Hebei, China
  • Received:2007-11-12 Revised:1900-01-01 Online:2008-05-10 Published:2008-05-10

摘要: 选择青藏铁路沿线不同海拔高度的10个地点采集土壤样品,直接提取样品中的总DNA,以巢式PCR扩增细菌16S rDNA片段,应用变性梯度凝胶电泳(DGGE)技术分离PCR扩增的16S rDNA片段,研究土壤细菌的种群多样性。结果表明,青藏铁路沿线高海拔地区具有较为丰富的细菌种群多样性,植被类型是影响青藏铁路沿线土壤细菌种群多样性的重要因素,也是影响土壤细菌种群结构相似性的重要因素,而海拔高度等是次要的影响因素;具有相似植被类型的土壤样品,其细菌种群多样性随海拔的升高而下降。

关键词: 森林, 生态环境, 井冈山林区

Abstract: Soil samples were collected from ten different-altitude sites along the QinghaiTibet railway, and the community DNA was extracted from the soil samples directly. Bacterial 16S rRNA gene fragment was amplified by nested PCR from the community DNA. Soil bacterial population diversity was analyzed by 16S rDNA-PCR-DGGE. The results showed that the bacterial population diversity was abundant in this high altitude area. Vegetation type was an important factor influencing the bacterial diversity and population similarity in this area, and the altitude acted as a minor impact factor. The bacterial population diversity of soil samples with similar vegetation type decreased with the increasing altitude.

Key words: Forest, Ecological environment, Jinggang Mountain forest region