Molecular microbial diversity of a soil sample and detection of ammonia oxidizers from Cape Evans, Mcmurdo Dry Valley, Antarctica

Microbiological Research
Bhupendra V ShravageYogesh S Shouche

Abstract

The aim of our study was to estimate the uncultured eubacterial diversity of a soil sample collected below a dead seal, Cape Evans, McMurdo, Antarctica by an SSU rDNA gene library approach. Our study by sequencing of clones from SSU rDNA gene library approach revealed high diversity in the soil sample from Antarctica. More than 50% of clones showed homology to Cytophaga-Flavobacterium-Bacteroides group; sequences also belonged to alpha, beta, gamma proteobacteria, Thermus-Deinococcus and high GC gram-positive group; Phylogenetic analysis of the SSU rDNA clones showed the presence of species belonging to Cytophaga spp., Vitellibacter vladivostokensis, Aequorivita lipolytica, Aequorivita crocea, Flavobacterium spp., Flexibacter sp., Subsaxibacter broadyi, Bacteroidetes, Roseobacter sp., Sphingomonas baekryungensis, Nitrosospira sp., Nitrosomonas cryotolerans, Psychrobacter spp., Chromohalobacter sp., Psychrobacter okhotskensis, Psychrobacter fozii, Psychrobacter urativorans, Rubrobacter radiotolerans, Marinobacter sp., Rubrobacteridae, Desulfotomaculum aeronauticum and Deinococcus sp. The presence of ammonia oxidizing bacteria in Antarctica soil was confirmed by the presence of the amoA gene. Phylogenetic analysis revealed groupi...Continue Reading

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Jul 3, 2013·Extremophiles : Life Under Extreme Conditions·Chun Wie ChongIrene Kit Ping Tan
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