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Bacterial community in the East Rongbuk Glacier, Mt. Qomolangma (Everest) by culture and culture-independent methods
- Source :
-
Microbiological Research . May2010, Vol. 165 Issue 4, p336-345. 10p. - Publication Year :
- 2010
-
Abstract
- Summary: The abundance of total and culturable bacteria deposited into the East Rongbuk ice core was investigated, and the bacterial content was examined through culture and culture-independent approaches. Total counts of bacteria in the ice core ranged from 0.02×103 to 6.4×103 cellsml−1. Viable bacteria varied between 0 and 5.6CFUml−1 on PYGV and R2A media. The phylogenetic trees placed the culturable bacteria into four major groups: Actinobacteria, Firmicutes, Proteobacteria and Deinococcus-Thermus, with Firmicutes being the most prevalent. They exhibited unique phenotypic properties with large and non-pigmented cells. The diversity revealed by H′ index of DGGE analysis was 0–0.75, and closer sections showed higher similarity of bacterial DNA structure. Members of two major lineages were found: Firmicutes and Proteobacteria. The combined culture and culture-independent methods indicated layer distribution of bacterial community in the ice core section, which might reflect the ecological environments on glacier at time of their deposition. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09445013
- Volume :
- 165
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Microbiological Research
- Publication Type :
- Academic Journal
- Accession number :
- 50696850
- Full Text :
- https://doi.org/10.1016/j.micres.2009.08.002