Psychrotolerant Bacteria Isolated from Arctic Soil That Degrade Polychlorinated Biphenyls at Low Temperatures
ABSTRACT Psychrotolerant polychlorinated biphenyl (PCB)-degrading bacteria were isolated at 7°C from PCB-contaminated Arctic soil by using biphenyl as the sole organic carbon source. These isolates were distinguished from each other by differences in substrates that supported growth and substrates t...
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American Society for Microbiology
1998
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Online Access: | http://dx.doi.org/10.1128/aem.64.12.4823-4829.1998 https://journals.asm.org/doi/pdf/10.1128/AEM.64.12.4823-4829.1998 |
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crasmicro:10.1128/aem.64.12.4823-4829.1998 2024-06-23T07:49:10+00:00 Psychrotolerant Bacteria Isolated from Arctic Soil That Degrade Polychlorinated Biphenyls at Low Temperatures Master, Emma R. Mohn, William W. 1998 http://dx.doi.org/10.1128/aem.64.12.4823-4829.1998 https://journals.asm.org/doi/pdf/10.1128/AEM.64.12.4823-4829.1998 en eng American Society for Microbiology https://journals.asm.org/non-commercial-tdm-license Applied and Environmental Microbiology volume 64, issue 12, page 4823-4829 ISSN 0099-2240 1098-5336 journal-article 1998 crasmicro https://doi.org/10.1128/aem.64.12.4823-4829.1998 2024-06-10T04:07:24Z ABSTRACT Psychrotolerant polychlorinated biphenyl (PCB)-degrading bacteria were isolated at 7°C from PCB-contaminated Arctic soil by using biphenyl as the sole organic carbon source. These isolates were distinguished from each other by differences in substrates that supported growth and substrates that were oxidized. 16S ribosomal DNA sequences suggest that these isolates are most closely related to the genus Pseudomonas . Total removal of Aroclor 1242, and rates of removal of selected PCB congeners, by cell suspensions of Arctic soil isolates and the mesophile Burkholderia cepacia LB400 were determined at 7, 37, and 50°C. Total removal values of Aroclor 1242 at 7°C by LB400 and most Arctic soil isolates were similar (between 2 and 3.5 μg of PCBs per mg of cell protein). However the rates of removal of some individual PCB congeners by Arctic isolates were up to 10 times higher than corresponding rates of removal by LB400. Total removal of Aroclor 1242 and the rates of removal of individual congeners by the Arctic soil bacteria were higher at 37°C than at 7°C but as much as 90% lower at 50°C than at 37°C. In contrast, rates of PCB removal by LB400 were higher at 50°C than at 37°C. In all cases, temperature did not affect the congener specificity of the bacteria. These observations suggest that the PCB-degrading enzyme systems of the bacteria isolated from Arctic soil are cold adapted. Article in Journal/Newspaper Arctic ASM Journals (American Society for Microbiology) Arctic Applied and Environmental Microbiology 64 12 4823 4829 |
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ASM Journals (American Society for Microbiology) |
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English |
description |
ABSTRACT Psychrotolerant polychlorinated biphenyl (PCB)-degrading bacteria were isolated at 7°C from PCB-contaminated Arctic soil by using biphenyl as the sole organic carbon source. These isolates were distinguished from each other by differences in substrates that supported growth and substrates that were oxidized. 16S ribosomal DNA sequences suggest that these isolates are most closely related to the genus Pseudomonas . Total removal of Aroclor 1242, and rates of removal of selected PCB congeners, by cell suspensions of Arctic soil isolates and the mesophile Burkholderia cepacia LB400 were determined at 7, 37, and 50°C. Total removal values of Aroclor 1242 at 7°C by LB400 and most Arctic soil isolates were similar (between 2 and 3.5 μg of PCBs per mg of cell protein). However the rates of removal of some individual PCB congeners by Arctic isolates were up to 10 times higher than corresponding rates of removal by LB400. Total removal of Aroclor 1242 and the rates of removal of individual congeners by the Arctic soil bacteria were higher at 37°C than at 7°C but as much as 90% lower at 50°C than at 37°C. In contrast, rates of PCB removal by LB400 were higher at 50°C than at 37°C. In all cases, temperature did not affect the congener specificity of the bacteria. These observations suggest that the PCB-degrading enzyme systems of the bacteria isolated from Arctic soil are cold adapted. |
format |
Article in Journal/Newspaper |
author |
Master, Emma R. Mohn, William W. |
spellingShingle |
Master, Emma R. Mohn, William W. Psychrotolerant Bacteria Isolated from Arctic Soil That Degrade Polychlorinated Biphenyls at Low Temperatures |
author_facet |
Master, Emma R. Mohn, William W. |
author_sort |
Master, Emma R. |
title |
Psychrotolerant Bacteria Isolated from Arctic Soil That Degrade Polychlorinated Biphenyls at Low Temperatures |
title_short |
Psychrotolerant Bacteria Isolated from Arctic Soil That Degrade Polychlorinated Biphenyls at Low Temperatures |
title_full |
Psychrotolerant Bacteria Isolated from Arctic Soil That Degrade Polychlorinated Biphenyls at Low Temperatures |
title_fullStr |
Psychrotolerant Bacteria Isolated from Arctic Soil That Degrade Polychlorinated Biphenyls at Low Temperatures |
title_full_unstemmed |
Psychrotolerant Bacteria Isolated from Arctic Soil That Degrade Polychlorinated Biphenyls at Low Temperatures |
title_sort |
psychrotolerant bacteria isolated from arctic soil that degrade polychlorinated biphenyls at low temperatures |
publisher |
American Society for Microbiology |
publishDate |
1998 |
url |
http://dx.doi.org/10.1128/aem.64.12.4823-4829.1998 https://journals.asm.org/doi/pdf/10.1128/AEM.64.12.4823-4829.1998 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
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Arctic |
op_source |
Applied and Environmental Microbiology volume 64, issue 12, page 4823-4829 ISSN 0099-2240 1098-5336 |
op_rights |
https://journals.asm.org/non-commercial-tdm-license |
op_doi |
https://doi.org/10.1128/aem.64.12.4823-4829.1998 |
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Applied and Environmental Microbiology |
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64 |
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12 |
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4823 |
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4829 |
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1802639441408294912 |