Andreote A. P. D., Vaz Mgmv, Genuario D. B., Barbiéro Laurent, Rezende A. T., Fiore M. F. (2014). Nonheterocytous cyanobacteria from Brazilian saline-alkaline lakes. Journal of Phycology, 50 (4), p. 675-684. ISSN 0022-3646.
Titre du document
Nonheterocytous cyanobacteria from Brazilian saline-alkaline lakes
Andreote A. P. D., Vaz Mgmv, Genuario D. B., Barbiéro Laurent, Rezende A. T., Fiore M. F.
Source
Journal of Phycology, 2014,
50 (4), p. 675-684 ISSN 0022-3646
Saline-alkaline lakes are extreme environments that limit the establishment and development of life. The Nhecolandia, a subregion of the Pantanal wetland in Brazil, is characterized by the existence of similar to 500 saline-alkaline lakes, which support an underexplored and rich diversity of microorganisms. In this study, unicellular and homocytous cyanobacteria from five saline-alkaline lakes were accessed by culture-dependent approaches. Morphological evaluation and analyses of near complete sequences (similar to 1400 nt) of the 16S rRNA genes were applied for phylogenetic and taxonomic placement. This polyphasic approach allowed for the determination of the taxonomic position of the isolated strains into the following genera: Cyanobacterium, Geminocystis, Phormidium, Leptolyngbya, Limnothrix, and Nodosilinea. In addition, fourteen Pseudanabaenales and Oscillatoriales representatives of putative novel taxa were found. These sequences fell into five new clades that could correspond to new generic units of the Pseudanabaenaceae and Phormidiaceae families.
