Phylogenetic identification of marine bacteria isolated from deep-sea sediments of the eastern South Atlantic Ocean

The deep-sea environments of the South Atlantic Ocean are less studied in comparison to the North Atlantic and Pacific Oceans. With the aim of identifying the deep-sea bacteria in this less known ocean, 70 strains were isolated from eight sediment samples (depth range between 1905 to 5560 m) collect...

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Bibliographic Details
Published in:SpringerPlus
Main Authors: da Silva, Marcus Adonai Castro, Cavalett, Angélica, Spinner, Ananda, Rosa, Daniele Cristina, Jasper, Regina Beltrame, Quecine, Maria Carolina, Bonatelli, Maria Letícia, Pizzirani-Kleiner, Aline, Corção, Gertrudes, Lima, André Oliveira de Souza
Format: Text
Language:English
Published: Springer International Publishing AG 2013
Subjects:
Research
Pacific
North Atlantic
South Atlantic Ocean
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3616218
http://www.ncbi.nlm.nih.gov/pubmed/23565357
https://doi.org/10.1186/2193-1801-2-127
Description
Summary:The deep-sea environments of the South Atlantic Ocean are less studied in comparison to the North Atlantic and Pacific Oceans. With the aim of identifying the deep-sea bacteria in this less known ocean, 70 strains were isolated from eight sediment samples (depth range between 1905 to 5560 m) collected in the eastern part of the South Atlantic, from the equatorial region to the Cape Abyssal Plain, using three different culture media. The strains were classified into three phylogenetic groups, Gammaproteobacteria, Firmicutes and Actinobacteria, by the analysis of 16s rRNA gene sequences. Gammaproteobacteria and Firmicutes were the most frequently identified groups, with Halomonas the most frequent genus among the strains. Microorganisms belonging to Firmicutes were the only ones observed in all samples. Sixteen of the 41 identified operational taxonomic units probably represent new species. The presence of potentially new species reinforces the need for new studies in the deep-sea environments of the South Atlantic.

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