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Diversity and Antimicrobial Activity of Cultivable Halophilic Archaea from Three Algerian Sites

Journal of Life Sciences 2013年第10期7卷 1057-1069页

作者： Nacera Imadalou-Idres Alyssa Carre-Mlouka Manon Vandervennet Houa Yahiaoui Jean Peduzzi Sylvie Rebuffat Laboratoryof Applied Microbiology University Abderrahmane Mira of Nature and Life Sciences Targua Ouzemour Bejaia 06000Algeria Communication Molecules and Adaptation of Microorganisms (MCAMUMR 7245 CNRS-MNHN) National Museum of NaturalHistory Paris 75005 France

hypersaline.environments are colonized by communities of microorganisms, which developed adaptations from halotolerant to extreme halophilic lifestyles. Twenty-four halophilic archaeal strains were isolated from three Algerian hypersaline.sites, including the solar salterns in Ichekaben and two natural salt lakes at Ouargla and Oran. Almost full-length 16S rRNA genes were amplified using archaeal-specific primers, sequenced and phylogenetically analyzed. Three isolates from the salt lake of Ouargla were affiliated to Halorubrum sp., while six isolates from Ichekaben were Natrinema sp.. The remaining strains belonged to the genus Haloarcula, which was identified in the three Algerian sites. A phylogenetic tree of Haloarcula sp. including the two copies of the 16S rRNA gene, showed that two strains group with Haloarcula hispanica, while the other 13 cluster with OHF-1/OHF-2 isolated from French commercial salt. Both Natrinema sp. and Haloarcula sp. were persistent at Ichekaben. For the six Natrinema sp. isolates, this observation correlates with their capacity to produce antimicrobial compounds, and a DNA fragment closely related to the halocin C8 gene was amplified for five strains.

关键词： Haloarcula Natrinema 16S rRNA gene divergence halocin C8 hypersaline.

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