The under-recognized dominance of Verrucomicrobia in soil bacterial communities

被引:538
作者
Bergmann, Gaddy T.
Bates, Scott T.
Eilers, Kathryn G.
Lauber, Christian L.
Caporaso, J. Gregory [2 ]
Walters, William A. [3 ]
Knight, Rob [2 ,4 ]
Fierer, Noah [1 ]
机构
[1] Univ Colorado, Dept Ecol & Evolutionary Biol, CIRES, Boulder, CO 80309 USA
[2] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA
[3] Univ Colorado, Dept Mol Cellular & Dev Biol, Boulder, CO 80309 USA
[4] Howard Hughes Med Inst, Chevy Chase, MD 20815 USA
基金
美国国家卫生研究院; 美国国家科学基金会;
关键词
Verrucomicrobia; Spartobacteria; Bacteria; Relative abundance; Ecological dominance; Primer bias; Barcoded pyrosequencing; 16S rRNA genes; Oligotroph; Subsurface horizon; 16S RIBOSOMAL-RNA; PURE-CULTURE; RICE FIELD; DIVERSITY; CULTURABILITY; CULTIVATION; SUCCESSION; STRAINS; SURFACE; MEMBERS;
D O I
10.1016/j.soilbio.2011.03.012
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
Verrucomicrobia are ubiquitous in soil, but members of this bacterial phylum are thought to be present at low frequency in soil, with few studies focusing specifically on verrucomicrobial abundance, diversity, and distribution. Here we used barcoded pyrosequencing to analyze verrucomicrobial communities in surface soils collected across a range of biomes in Antarctica, Europe, and the Americas (112 samples), as well as soils collected from pits dug in a montane coniferous forest (69 samples). Data collected from surface horizons indicate that Verrucomicrobia average 23% of bacterial sequences, making them far more abundant than had been estimated. We show that this underestimation is likely due to primer bias, as many of the commonly used PCR primers appear to exclude verrucomicrobial 165 rRNA genes during amplification. Verrucomicrobia were detected in 180 out of 181 soils examined, with members of the class Spartobacteria dominating verrucomicrobial communities in nearly all biomes and soil depths. The relative abundance of Verrucomicrobia was highest in grasslands and in subsurface soil horizons, where they were often the dominant bacterial phylum. Although their ecology remains poorly understood, Verrucomicrobia appear to be dominant in many soil bacterial communities across the globe, making additional research on their ecology clearly necessary. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1450 / 1455
页数:6
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