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Pantanalinema gen. nov and Alkalinema gen. nov.: novel pseudanabaenacean genera (Cyanobacteria) isolated from saline-alkaline lakes

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Marcal Vieira Vaz, Marcelo Gomes ; Genuario, Diego Bonaldo ; Dini Andreote, Ana Paula ; Silva Malone, Camila Francieli ; Sant'Anna, Celia Leite ; Barbiero, Laurent ; Fiore, Marli Fatima
Número total de Autores: 7
Tipo de documento: Artigo Científico

The genus Leptolyngbya Anagnostidis & Komarek (1988) was described from a set of strains identified as 'LW-group B'. The morphology within this group is not particularly informative and underestimates the group's genetic diversity. In the present study, two new pseudanabaenacean genera related to Leptolyngbya morphotypes, Pantanalinema gen. nov. and Alkalinema gen. nov., are described under the provisions of the International Code of Nomenclature for Algae, Fungi and Plants, based on a polyphasic approach. Pantanalinema gen. nov. (type species Pantanalinema rosaneae sp. nov.) has sheaths and trichomes with slight gliding motility, which distinguish this genus from Alkalinema gen. nov. (type species Alkalinema pantanalense sp. nov.), which possesses trichomes arranged in an ornate (interwoven) pattern. 16S rRNA gene sequences of strains of Pantanalinema and Alkalinema exhibited low identity to each other (<= 91.6%) and to other sequences from known pseudanabaenacean genera (<= 94.3 and 93.7 %, respectively). In a phylogenetic reconstruction, six sequences from strains of Pantanalinema and four from strains of Alkalinema formed two separate and robust clades (99 % bootstrap value), with the genera Oculatella and Phormidesmis, respectively, as the closest related groups. 16S-23S rRNA intergenic spacer sequences and secondary structures of strains of Pantanalinema and Alkalinema did not correspond to any previous descriptions. The strains of Pantanalinema and Alkalinema were able to survive and produce biomass at a range of pH (pH 4-11) and were also able to alter the culture medium to pH values ranging from pH 8.4 to 9.9. These data indicate that cyanobacterial communities in underexplored environments, such as the Pantanal wetlands, are promising sources of novel taxa. (AU)

Processo FAPESP: 09/15402-1 - Cianobactérias da filosfera da Mata Atlântica: isolamento, taxonomia e bioprospecção
Beneficiário:Ana Paula Dini Andreote
Modalidade de apoio: Bolsas no Brasil - Doutorado
Processo FAPESP: 13/09192-0 - Salinas do Pantanal da Nhecolândia (MS): Hidro-bio-geoquímica de uma área úmida singular
Beneficiário:Laurent Barbiero
Modalidade de apoio: Auxílio à Pesquisa - Regular
Processo FAPESP: 10/18732-0 - Produtos naturais bioativos de cianobactérias marinhas
Beneficiário:Marcelo Gomes Marçal Vieira Vaz
Modalidade de apoio: Bolsas no Brasil - Doutorado
Processo FAPESP: 10/00321-3 - Diversidade e atividade funcional de cianobactérias do Arquipélago Shetlands do Sul, Continente Antártico
Beneficiário:Diego Bonaldo Genuário
Modalidade de apoio: Bolsas no Brasil - Doutorado
Processo FAPESP: 10/51666-0 - Diversidade fenotipica, molecular e avaliacao do potencial biotecnologico do genero phormidium (cyanobacteria) em ambientes aquaticos e aerofiticos da mata atlantica e pantanal, brasil
Beneficiário:Camila Francieli da Silva Malone
Modalidade de apoio: Bolsas no Brasil - Doutorado