Shivaji, Sisinthy ; Begum, Zareena ; Shiva Nageswara Rao, Singireesu Soma ; Vishnu Vardhan Reddy, Puram V. ; Manasa, Poorna ; Sailaja, Buddi ; Prathiba, Mambatta S. ; Thamban, Meloth ; Krishnan, Kottekkatu P. ; Singh, Shiv M. ; Srinivas, Tanuku N.R. (2013) Antarctic ice core samples: culturable bacterial diversity Research in Microbiology, 164 (1). pp. 70-82. ISSN 0923-2508
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Official URL: https://doi.org/10.1016/j.resmic.2012.09.001
Related URL: http://dx.doi.org/10.1016/j.resmic.2012.09.001
Abstract
Culturable bacterial abundance at 11 different depths of a 50.26 m ice core from the Tallaksenvarden Nunatak, Antarctica, varied from 0.02 to 5.8 × 103 CFU ml−1 of the melt water. A total of 138 bacterial strains were recovered from the 11 different depths of the ice core. Based on 16S rRNA gene sequence analyses, the 138 isolates could be categorized into 25 phylotypes belonging to phyla Actinobacteria, Bacteroidetes, Firmicutes and Proteobacteria. All isolates had 16S rRNA sequences similar to previously determined sequences (97.2–100%). No correlation was observed in the distribution of the isolates at the various depths either at the phylum, genus or species level. The 25 phylotypes varied in growth temperature range, tolerance to NaCl, growth pH range and ability to produce eight different extracellular enzymes at either 4 or 18 °C. Iso-, anteiso-, unsaturated and saturated fatty acids together constituted a significant proportion of the total fatty acid
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier B.V. |
| Keywords: | 16S rRNA gene; Actinobacteria; Bacteroidetes; Firmicutes; Proteobacteria; Phenotypic characteristics; Extracellular enzymatic activities; Fatty acid profiles. |
| ID Code: | 140239 |
| Deposited On: | 09 Sep 2025 14:10 |
| Last Modified: | 09 Sep 2025 14:10 |
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