Abstract

GOMEZ GOMEZ, Liliana Cecilia; VALERO VALERO, Nelson  and  MORALES AVENDANO, Ever. Halotolerant alkalophilic and indolacetic acid producing bacteria associated with Arthrospira platensis (Cyanophyceae). Rev. colomb. biotecnol [online]. 2012, vol.14, n.2, pp.81-88. ISSN 0123-3475.

The aim of this study was contribute to knowledge over alkalophilic cianobacteryum Arthrospira platensis and their interaction with some associated bacteria growing in their mucilage. Heterotrophic culture medium was designed, in this medium were isolated five bacterial strains associated to single culture of A. platensis. It was measured the 3-indol acetic acid (IAA) production by these bacterial strains. Molecular typing allowed identify these bacterial strains like Exiguobacterium aurantiacum str. DSM 20416, Xanthomonas sp. ML-122, Halomonas sp. Ap-5, Bacillus okhensis str. Kh10-101, Indibacter alkaliphilus, type str. LW1T; all these bacteria are halotolerant, alkalophilic and IAA producer. The findings allow suggest a beneficial interaction between A. platensis and their associated bacteria, maybe as evolutionary strategy of cooperation to grow and develop in hypersaline environments.

Keywords : Bacillus okhensis; Exiguobacterium aurantiacum; Halomonas sp.; Indibacter alkaliphilus; Xanthomonas sp..

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