- Environmental Adaptation of Psychrophilic Bacteria Subtercola spp. Isolated from Various Cryospheric Habitats
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Hanbyul Lee , Yong-Joon Cho , Ahnna Cho , Ok-Sun Kim
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J. Microbiol. 2023;61(7):663-672. Published online August 24, 2023
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DOI: https://doi.org/10.1007/s12275-023-00068-y
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Subtercola boreus K300T
is a novel psychrophilic strain that was isolated from permanently cold groundwater in Finland
and has also been found in several places in Antarctica including lake, soil, and rocks. We performed genomic and transcriptomic
analyses of 5 strains from Antarctica and a type strain to understand their adaptation to different environments.
Interestingly, the isolates from rocks showed a low growth rate and smaller genome size than strains from the other isolation
sources (lake, soil, and groundwater). Based on these habitat-dependent characteristics, the strains could be classified
into two ecotypes, which showed differences in energy production, signal transduction, and transcription in the clusters of
orthologous groups of proteins (COGs) functional category. In addition, expression pattern changes revealed differences
in metabolic processes, including uric acid metabolism, DNA repair, major facilitator superfamily (MFS) transporters, and
xylose degradation, depending on the nutritional status of their habitats. These findings provide crucial insights into the
environmental adaptation of bacteria, highlighting genetic diversity and regulatory mechanisms that enable them to thrive
in the cryosphere.
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Citations
Citations to this article as recorded by  - Assessment of pathogenic traits in selected bacteria isolated from snowy environments in France and Greenland
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- Bacterial Diversity in Ornithogenic Soils Compared to Mineral Soils on King George Island, Antarctica
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Ok-Sun Kim , Namyi Chae , Hyun Soo Lim , Ahnna Cho , Jeong Hoon Kim , Soon Gyu Hong , Jeongsu Oh
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J. Microbiol. 2012;50(6):1081-1085. Published online December 30, 2012
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DOI: https://doi.org/10.1007/s12275-012-2655-7
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802
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Abstract
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In the Narębski Point area of King George Island of Antarctica, ornithogenic soils form on land under Chinstrap and Gentoo Penguin rookeries. The purpose of this study was to compare the bacterial community compositions in the gradient of contamination by penguin feces; mineral soil with no contamination, and soils with medium or high contamination. The discrimination between mineral soils and ornithogenic soils by characterization of physicochemical properties and bacterial communities was notable. Physicochemical analyses of soil properties showed enrichment of carbon and nitrogen in ornithogenic soils. Firmicutes were present abundantly in active ornithogenic soils, Bacteroidetes and Proteobacteria in a formerly active one, and several diverse phyla such as Proteobacteria, Actinobacteria, and Acidobacteria in mineral soils. Some predominant species belonging to the Firmicutes and Gammaproteobacteria may play an important role for the mineralization of nutrients in ornithogenic soils. Results of this study indicate that dominant species may play an important role in mineralization of nutrients in these ecosystems.
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