Remarkable Diversity of Phototrophic Purple Bacteria in a Permanently Frozen Antarctic Lake
Although anoxygenic photosynthesis is thought to play an important role in the primary productivity of permanently frozen lakes in the Antarctic dry valleys, the bacterial communities responsible for this metabolism remain uncharacterized. Here we report the composition and activity of phototrophic...
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American Society for Microbiology
2003
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ftpubmed:oai:pubmedcentral.nih.gov:169089 2023-05-15T13:32:01+02:00 Remarkable Diversity of Phototrophic Purple Bacteria in a Permanently Frozen Antarctic Lake Karr, Elizabeth A. Sattley, W. Matthew Jung, Deborah O. Madigan, Michael T. Achenbach, Laurie A. 2003-08 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC169089 http://www.ncbi.nlm.nih.gov/pubmed/12902286 https://doi.org/10.1128/AEM.69.8.4910-4914.2003 en eng American Society for Microbiology http://www.ncbi.nlm.nih.gov/pmc/articles/PMC169089 http://www.ncbi.nlm.nih.gov/pubmed/12902286 http://dx.doi.org/10.1128/AEM.69.8.4910-4914.2003 Copyright © 2003, American Society for Microbiology Microbial Ecology Text 2003 ftpubmed https://doi.org/10.1128/AEM.69.8.4910-4914.2003 2013-08-29T12:43:25Z Although anoxygenic photosynthesis is thought to play an important role in the primary productivity of permanently frozen lakes in the Antarctic dry valleys, the bacterial communities responsible for this metabolism remain uncharacterized. Here we report the composition and activity of phototrophic purple bacteria in Lake Fryxell, Antarctica, as determined by analysis of a photosynthesis-specific gene, pufM. The results revealed an extensive diversity and highly stratified distribution of purple nonsulfur bacteria in Lake Fryxell and showed which phylotypes produced pufM transcripts in situ. Enrichment cultures for purple bacteria yielded two morphotypes, each with a pufM signature identical to signatures detected by environmental screening. The isolates also contained gas vesicles, buoyancy structures previously unknown in purple nonsulfur bacteria, that may be necessary for these organisms to position themselves at specific depths within the nearly freezing water column. Text Antarc* Antarctic Antarctica PubMed Central (PMC) Antarctic Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Lake Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) The Antarctic Applied and Environmental Microbiology 69 8 4910 4914 |
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Open Polar |
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PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Microbial Ecology |
spellingShingle |
Microbial Ecology Karr, Elizabeth A. Sattley, W. Matthew Jung, Deborah O. Madigan, Michael T. Achenbach, Laurie A. Remarkable Diversity of Phototrophic Purple Bacteria in a Permanently Frozen Antarctic Lake |
topic_facet |
Microbial Ecology |
description |
Although anoxygenic photosynthesis is thought to play an important role in the primary productivity of permanently frozen lakes in the Antarctic dry valleys, the bacterial communities responsible for this metabolism remain uncharacterized. Here we report the composition and activity of phototrophic purple bacteria in Lake Fryxell, Antarctica, as determined by analysis of a photosynthesis-specific gene, pufM. The results revealed an extensive diversity and highly stratified distribution of purple nonsulfur bacteria in Lake Fryxell and showed which phylotypes produced pufM transcripts in situ. Enrichment cultures for purple bacteria yielded two morphotypes, each with a pufM signature identical to signatures detected by environmental screening. The isolates also contained gas vesicles, buoyancy structures previously unknown in purple nonsulfur bacteria, that may be necessary for these organisms to position themselves at specific depths within the nearly freezing water column. |
format |
Text |
author |
Karr, Elizabeth A. Sattley, W. Matthew Jung, Deborah O. Madigan, Michael T. Achenbach, Laurie A. |
author_facet |
Karr, Elizabeth A. Sattley, W. Matthew Jung, Deborah O. Madigan, Michael T. Achenbach, Laurie A. |
author_sort |
Karr, Elizabeth A. |
title |
Remarkable Diversity of Phototrophic Purple Bacteria in a Permanently Frozen Antarctic Lake |
title_short |
Remarkable Diversity of Phototrophic Purple Bacteria in a Permanently Frozen Antarctic Lake |
title_full |
Remarkable Diversity of Phototrophic Purple Bacteria in a Permanently Frozen Antarctic Lake |
title_fullStr |
Remarkable Diversity of Phototrophic Purple Bacteria in a Permanently Frozen Antarctic Lake |
title_full_unstemmed |
Remarkable Diversity of Phototrophic Purple Bacteria in a Permanently Frozen Antarctic Lake |
title_sort |
remarkable diversity of phototrophic purple bacteria in a permanently frozen antarctic lake |
publisher |
American Society for Microbiology |
publishDate |
2003 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC169089 http://www.ncbi.nlm.nih.gov/pubmed/12902286 https://doi.org/10.1128/AEM.69.8.4910-4914.2003 |
long_lat |
ENVELOPE(163.183,163.183,-77.617,-77.617) ENVELOPE(163.183,163.183,-77.617,-77.617) |
geographic |
Antarctic Fryxell Lake Fryxell The Antarctic |
geographic_facet |
Antarctic Fryxell Lake Fryxell The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC169089 http://www.ncbi.nlm.nih.gov/pubmed/12902286 http://dx.doi.org/10.1128/AEM.69.8.4910-4914.2003 |
op_rights |
Copyright © 2003, American Society for Microbiology |
op_doi |
https://doi.org/10.1128/AEM.69.8.4910-4914.2003 |
container_title |
Applied and Environmental Microbiology |
container_volume |
69 |
container_issue |
8 |
container_start_page |
4910 |
op_container_end_page |
4914 |
_version_ |
1766023677918314496 |