Cold-active acetogenic bacteria from surficial sediments of perennially ice-covered Lake Fryxell, Antarctica
Cold-active acetogenic bacteria in the permanently cold sediments of Lake Fryxell, Antarctica were investigated using culture-based methods. Two psychrophilic, acetogenic strains were isolated and found to be physiologically and phylogenetically related to Acetobacterium bakii and Acetobacterium tun...
Published in: | FEMS Microbiology Letters |
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Main Authors: | , |
Format: | Text |
Language: | English |
Published: |
Oxford University Press
2007
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Subjects: | |
Online Access: | http://femsle.oxfordjournals.org/cgi/content/short/272/1/48 https://doi.org/10.1111/j.1574-6968.2007.00737.x |
Summary: | Cold-active acetogenic bacteria in the permanently cold sediments of Lake Fryxell, Antarctica were investigated using culture-based methods. Two psychrophilic, acetogenic strains were isolated and found to be physiologically and phylogenetically related to Acetobacterium bakii and Acetobacterium tundrae . However, the Antarctic isolates showed a lower growth temperature range than other species of Acetobacterium , with growth occurring from −2.5 to 25°C and optimally at 19–21°C. Cultures incubated at +5 and +1°C grew with generation times of 7 and 9 days, respectively. The rapid growth of these strains at low temperatures suggests that acetogenesis may be an important anaerobic process in the sediments of Lake Fryxell. |
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