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Diversity of Culturable Bacteria degrading Antarctic and Arctic Soil Humic Acids

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Title
Diversity of Culturable Bacteria degrading Antarctic and Arctic Soil Humic Acids
Other Titles
남북극 유래 토양 부식질 분해능이 있는 배양가능 세균의 다양성 조사
Authors
Park, Ha Ju
Kim, Dockyu
Keywords
bacteria; degradation; diversity; humic acids; humic substances
Issue Date
2012
Citation
Park, Ha Ju, Kim, Dockyu. 2012. Diversity of Culturable Bacteria degrading Antarctic and Arctic Soil Humic Acids. 한국미생물학회연합. 한국미생물학회연합. 2012.10.11~.
Abstract
Soil humic substances (HS), composed mainly of humic acids (HA), are widely distributed in cold natural environments and are known as an important fraction of soil organic carbon (SOC). Although bacteria dominate the soil environment, their ability to degrade and/or partially biotransform the stable HS has not been reported well. To study the diversity of bacterial degraders of HS in polar area, a total of 99 bacterial strains were isolated on Humic Acid Vitamin Agar from various soil samples: 45 strains from 66 sites in Nome, Alaska (August, 2011) and 54 strains around the King Sejong Station, Barton Peninsula, Antarctica (January, 2012). They were identified based on 16S rRNA sequence similarity using EzTaxon program, and then grouped as follows: Phylum Firmicutes (82.5%), Class r-Proteobacteria (14.7%), and miscellaneous group (2.8%) from Arctic Alaska; r-Proteobacteria (83.3%) and miscellaneous group (16.7%) from Antarctic King Sejong Station. For a detailed analysis, they were affiliated with Pseudomonas (15 strains), Paenibacillus (27 strains),and the other (3 strains) from Arctic samples and Pseudomonas (43 strains) and the other (11 strains) from Antarctic ones. Since the HA-degraders are believed to play an important role in the cycle of SOC, as the first step, we are studying the HA-degradation pathway(s) by polar bacteria.heir ability to degrade and/or partially biotransform the stable HS has not been reported well. To study the diversity of bacterial degraders of HS in polar area, a total of 99 bacterial strains were isolated on Humic Acid Vitamin Agar from various soil samples: 45 strains from 66 sites in Nome, Alaska (August, 2011) and 54 strains around the King Sejong Station, Barton Peninsula, Antarctica (January, 2012). They were identified based on 16S rRNA sequence similarity using EzTaxon program, and then grouped as follows: Phylum Firmicutes (82.5%), Class r-Proteobacteria (14.7%), and miscellaneous group (2.8%) from Arctic Alaska; r-Proteo
URI
http://repository.kopri.re.kr/handle/201206/8419
Conference Name
한국미생물학회연합
Conference Place
한국미생물학회연합
Conference Date
2012.10.11~
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