Abstract
The main aim was to evaluate the occurrence of cellulolytic bacteria from the Stain house Lake, located at Admiralty Bay, Antarctica. Thick cotton string served as a cellulose bait for the isolation of bacteria. A total of 52 bacterial isolates were recovered and tested for their cellulase activity, and two of them, isolates CMAA 1184 and CMAA 1185, showed significant cellulolytic activity on carboxymethylcellulose agar plates. Phylogenetic analysis placed the isolates into the Bacillus 16S ribosomal RNA gene subclade. Both isolates produced a cold-active cellulase which may play a crucial role in this extreme environment.
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Acknowledgments
This study was made possible with the financial and logistic support of PROANTAR and Marine of Brazil. This is part of the IPY activity 403 “MIDIAPI Microbial Diversity of Terrestrial and Maritime Ecosystems in Antarctic Peninsula.” TDZ is also grateful to FAPESP for providing the funding for developing this research (grants 11/50243-1 and 11/14333-6).
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Supplementary Table 1
Fatty acid composition (%) of the isolates (DOCX 12 kb)
Supplementary Figure 1
Cellulolytic activity of isolates CMAA 1184 and CMAA 1185 estimated using the dinitrosalicylic acid method [DNS; filter paper as substrate in 50 mM sodium acetate buffer (pH 5.0)]. Bars, standard error (DOCX 72 kb)
Supplementary Figure 2
Cellulolytic activity of isolates CMAA 1184 and CMAA 1185 estimated using the dinitrosalicylic acid method [DNS; filter paper as substrate in 50 mM sodium acetate buffer (pH 3-10)]. Bars, standard error (DOCX 67 kb)
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Melo, I.S., Zucchi, T.D., Silva, R.E. et al. Isolation and characterization of cellulolytic bacteria from the Stain house Lake, Antarctica. Folia Microbiol 59, 303–306 (2014). https://doi.org/10.1007/s12223-013-0295-x
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DOI: https://doi.org/10.1007/s12223-013-0295-x