Manganese Reduction by Microbes from Oxic Regions of the Lake Vanda (Antarctica) Water Column
Depth profiles of metals in Lake Vanda, a permanently ice-covered, stratified Antarctic lake, suggest the importance of particulate manganese oxides in the scavenging, transport, and release of metals. Since manganese oxides can be solubilized by manganese-reducing bacteria, microbially mediated man...
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ftpubmed:oai:pubmedcentral.nih.gov:106551 2023-05-15T14:03:18+02:00 Manganese Reduction by Microbes from Oxic Regions of the Lake Vanda (Antarctica) Water Column Bratina, Bonnie Jo Stevenson, Bradley S. Green, William J. Schmidt, Thomas M. 1998-10 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC106551 http://www.ncbi.nlm.nih.gov/pubmed/9758801 en eng American Society for Microbiology http://www.ncbi.nlm.nih.gov/pmc/articles/PMC106551 http://www.ncbi.nlm.nih.gov/pubmed/9758801 Copyright © 1998, American Society for Microbiology General Microbial Ecology Text 1998 ftpubmed 2013-08-29T10:03:48Z Depth profiles of metals in Lake Vanda, a permanently ice-covered, stratified Antarctic lake, suggest the importance of particulate manganese oxides in the scavenging, transport, and release of metals. Since manganese oxides can be solubilized by manganese-reducing bacteria, microbially mediated manganese reduction was investigated in Lake Vanda. Microbes concentrated from oxic regions of the water column, encompassing a peak of soluble manganese [Mn(II)], reduced synthetic manganese oxides (MnO2) when incubated aerobically. Pure cultures of manganese-reducing bacteria were readily isolated from waters collected near the oxic Mn(II) peak. Based on phylogenetic analysis of the 16S rRNA gene sequence, most of the isolated manganese reducers belong to the genus Carnobacterium. Cultures of a phylogenetically representative strain of Carnobacterium reduced synthetic MnO2 in the presence of sodium azide, as was seen in field assays. Unlike anaerobes that utilize manganese oxides as terminal electron acceptors in respiration, isolates of the genus Carnobacterium reduced Mn(IV) via a diffusible compound under oxic conditions. The release of adsorbed trace metals accompanying the solubilization of manganese oxides may provide populations of Carnobacterium with a source of nutrients in this extremely oligotrophic environment. Text Antarc* Antarctic Antarctica PubMed Central (PMC) Antarctic Lake Vanda ENVELOPE(161.600,161.600,-77.517,-77.517) Vanda ENVELOPE(161.550,161.550,-77.533,-77.533) |
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PubMed Central (PMC) |
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ftpubmed |
language |
English |
topic |
General Microbial Ecology |
spellingShingle |
General Microbial Ecology Bratina, Bonnie Jo Stevenson, Bradley S. Green, William J. Schmidt, Thomas M. Manganese Reduction by Microbes from Oxic Regions of the Lake Vanda (Antarctica) Water Column |
topic_facet |
General Microbial Ecology |
description |
Depth profiles of metals in Lake Vanda, a permanently ice-covered, stratified Antarctic lake, suggest the importance of particulate manganese oxides in the scavenging, transport, and release of metals. Since manganese oxides can be solubilized by manganese-reducing bacteria, microbially mediated manganese reduction was investigated in Lake Vanda. Microbes concentrated from oxic regions of the water column, encompassing a peak of soluble manganese [Mn(II)], reduced synthetic manganese oxides (MnO2) when incubated aerobically. Pure cultures of manganese-reducing bacteria were readily isolated from waters collected near the oxic Mn(II) peak. Based on phylogenetic analysis of the 16S rRNA gene sequence, most of the isolated manganese reducers belong to the genus Carnobacterium. Cultures of a phylogenetically representative strain of Carnobacterium reduced synthetic MnO2 in the presence of sodium azide, as was seen in field assays. Unlike anaerobes that utilize manganese oxides as terminal electron acceptors in respiration, isolates of the genus Carnobacterium reduced Mn(IV) via a diffusible compound under oxic conditions. The release of adsorbed trace metals accompanying the solubilization of manganese oxides may provide populations of Carnobacterium with a source of nutrients in this extremely oligotrophic environment. |
format |
Text |
author |
Bratina, Bonnie Jo Stevenson, Bradley S. Green, William J. Schmidt, Thomas M. |
author_facet |
Bratina, Bonnie Jo Stevenson, Bradley S. Green, William J. Schmidt, Thomas M. |
author_sort |
Bratina, Bonnie Jo |
title |
Manganese Reduction by Microbes from Oxic Regions of the Lake Vanda (Antarctica) Water Column |
title_short |
Manganese Reduction by Microbes from Oxic Regions of the Lake Vanda (Antarctica) Water Column |
title_full |
Manganese Reduction by Microbes from Oxic Regions of the Lake Vanda (Antarctica) Water Column |
title_fullStr |
Manganese Reduction by Microbes from Oxic Regions of the Lake Vanda (Antarctica) Water Column |
title_full_unstemmed |
Manganese Reduction by Microbes from Oxic Regions of the Lake Vanda (Antarctica) Water Column |
title_sort |
manganese reduction by microbes from oxic regions of the lake vanda (antarctica) water column |
publisher |
American Society for Microbiology |
publishDate |
1998 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC106551 http://www.ncbi.nlm.nih.gov/pubmed/9758801 |
long_lat |
ENVELOPE(161.600,161.600,-77.517,-77.517) ENVELOPE(161.550,161.550,-77.533,-77.533) |
geographic |
Antarctic Lake Vanda Vanda |
geographic_facet |
Antarctic Lake Vanda Vanda |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC106551 http://www.ncbi.nlm.nih.gov/pubmed/9758801 |
op_rights |
Copyright © 1998, American Society for Microbiology |
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