Remarkable Diversity of Phototrophic Purple Bacteria in a Permanently Frozen Antarctic Lake
ABSTRACT 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 phot...
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Online Access: | http://dx.doi.org/10.1128/aem.69.8.4910-4914.2003 https://journals.asm.org/doi/pdf/10.1128/AEM.69.8.4910-4914.2003 |
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crasmicro:10.1128/aem.69.8.4910-4914.2003 2024-09-30T14:23:55+00:00 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 http://dx.doi.org/10.1128/aem.69.8.4910-4914.2003 https://journals.asm.org/doi/pdf/10.1128/AEM.69.8.4910-4914.2003 en eng American Society for Microbiology https://journals.asm.org/non-commercial-tdm-license Applied and Environmental Microbiology volume 69, issue 8, page 4910-4914 ISSN 0099-2240 1098-5336 journal-article 2003 crasmicro https://doi.org/10.1128/aem.69.8.4910-4914.2003 2024-09-17T04:07:40Z ABSTRACT 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica ASM Journals (American Society for Microbiology) 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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ASM Journals (American Society for Microbiology) |
op_collection_id |
crasmicro |
language |
English |
description |
ABSTRACT 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 |
Article in Journal/Newspaper |
author |
Karr, Elizabeth A. Sattley, W. Matthew Jung, Deborah O. Madigan, Michael T. Achenbach, Laurie A. |
spellingShingle |
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 |
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://dx.doi.org/10.1128/aem.69.8.4910-4914.2003 https://journals.asm.org/doi/pdf/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_source |
Applied and Environmental Microbiology volume 69, issue 8, page 4910-4914 ISSN 0099-2240 1098-5336 |
op_rights |
https://journals.asm.org/non-commercial-tdm-license |
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_ |
1811639002599522304 |