Description of Aliinostoc alkaliphilum sp. nov. (Nostocales, Cyanobacteria), a New Bioactive Metabolite-Producing Strain from Salina Verde (Pantanal, Brazil) and Taxonomic Distribution of Bioactive Metabolites in Nostoc and Nostoc-like Genera

Cyanobacteria are a group of oxygenic photosynthetic prokaryotes found in almost all habitats on earth including those characterized as extreme environments. It has been observed that the number studies dealing with biodiversity extremophilic cyanobacteria is limited while exploring their bioactive potential even scarcer. The taxonomy three Nostoc-like cyanobacterial strains isolated from shallow lake Brazil was studied by applying polyphasic approach. also evaluated using antimicrobial susceptibility testing. metabolites present HPLC fractions were identified UPLC/ESI/Q-TOF. Based our phylogenetic inferences combination morphological and ecological information, we describe Aliinostoc alkaliphilum sp. nov., exhibiting antibacterial antifungal activities. main metabolite nocuolin A, which represents first report this Aliinostoc. Our revealed many metabolite-producting currently assigned to Nostoc belong other distinct evolutionary lineages. These findings highlight importance approach both natural product discovery programs.