Morphological and molecular characterization of Stigonema jureiensis sp. nov. (Nostocales, Cyanobacteria) from the Atlantic Rainforest, Sao Paulo, Brazil
2019
Tropical regions are considered hotspots of biodiversity, and the genus Stigonema has been underexplored in all world, mainly due to the difficulties of culturing. In this study, we sequenced the 16S rRNA gene of a natural Stigonema population from the
tropical Atlantic
Rainforest(Sao Paulo, Brazil) and describe S. jureiensis sp. nov. based on phylogenetic and morphological data. For the molecular analysis, the genomic DNA was isolated from aliquots of the population, which were previously manually cleaned under a microscope, using a point-tapered
Pasteur pipetteto remove other organisms and debris. For
morphological analysis, 30 individuals were analyzed and photographed using microscope. Both maximum likelihood and Bayesian phylogenies support S. jureiensis as a new species, and
morphological analysisrevealed the presence of a special type of mosaic ornate sheaths.
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