Arid
DOI10.1111/j.1574-6941.2006.00265.x
Three distinct clades of cultured heterocystous cyanobacteria constitute the dominant N-2-fixing members of biological soil crusts of the Colorado Plateau, USA
Yeager, Chris M.; Kornosky, Jennifer L.; Morgan, Rachael E.; Cain, Elizabeth C.; Garcia-Pichel, Ferran; Housman, David C.; Belnap, Jayne; Kuske, Cheryl R.
通讯作者Kuske, Cheryl R.
来源期刊FEMS MICROBIOLOGY ECOLOGY
ISSN0168-6496
出版年2007
卷号60期号:1页码:85-97
英文摘要

The identity of the numerically dominant N-2-fixing bacteria in biological soil crusts of the Colorado Plateau region and two outlying areas was determined using multiple approaches, to link the environmental diversity of nifH gene sequences to cultured bacterial isolates from the regions. Of the nifH sequence-types detected in soil crusts of the Colorado Plateau, 89% (421/473) were most closely related to nifH signature sequences from cyanobacteria of the order Nostocales. N-2-fixing cyanobacterial strains were cultured from crusts and their morphotypes, 16S rRNA gene and nifH gene sequences were characterized. The numerically dominant diazotrophs in the Colorado Plateau crusts fell within three clades of heterocystous cyanobacteria. Two clades are well-represented by phylogenetically and morphologically coherent strains, corresponding to the descriptions of Nostoc commune and Scytonema hyalinum, which are widely recognized as important N-2-fixing components of soil crusts. A third, previously-overlooked clade was represented by a phylogenetically coherent but morphologically diverse group of strains that encompass the morphogenera Tolypothrix and Spirirestis. Many of the strains in each of these groups contained at least two nifH copies that represent different clusters in the nifH environmental survey.


英文关键词cyanobacteria nitrogen fixation nifH biological soil crust Nostoc Scytonema
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000244883800009
WOS关键词RIBOSOMAL-RNA GENE ; NITROGEN-FIXATION ; MICROCOLEUS-CHTHONOPLASTES ; MICROBIAL DIVERSITY ; COMMUNITY STRUCTURE ; SEQUENCE ALIGNMENT ; DESERT CRUSTS ; LAKE BONNEY ; ICE COVER ; SP-NOV
WOS类目Microbiology
WOS研究方向Microbiology
来源机构Arizona State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/154202
作者单位(1)Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA;(2)Arizona State Univ, Sch Life Sci, Tempe, AZ USA
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Yeager, Chris M.,Kornosky, Jennifer L.,Morgan, Rachael E.,et al. Three distinct clades of cultured heterocystous cyanobacteria constitute the dominant N-2-fixing members of biological soil crusts of the Colorado Plateau, USA[J]. Arizona State University,2007,60(1):85-97.
APA Yeager, Chris M..,Kornosky, Jennifer L..,Morgan, Rachael E..,Cain, Elizabeth C..,Garcia-Pichel, Ferran.,...&Kuske, Cheryl R..(2007).Three distinct clades of cultured heterocystous cyanobacteria constitute the dominant N-2-fixing members of biological soil crusts of the Colorado Plateau, USA.FEMS MICROBIOLOGY ECOLOGY,60(1),85-97.
MLA Yeager, Chris M.,et al."Three distinct clades of cultured heterocystous cyanobacteria constitute the dominant N-2-fixing members of biological soil crusts of the Colorado Plateau, USA".FEMS MICROBIOLOGY ECOLOGY 60.1(2007):85-97.
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