Journal
MOLECULAR PHYLOGENETICS AND EVOLUTION
Volume 98, Issue -, Pages 147-160Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2016.02.009
Keywords
Cyanobacteria; Thermal springs; Polyphasic taxonomy; Morphology; Molecular phylogeny; rRNA secondary structures
Funding
- EU 7FP project Micro B3, Marine Microbial Biodiversity, Bioinformatics, Biotechnology
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Strains of Cyanobacteria isolated from mats of 9 thermal springs of Greece have been studied for their taxonomic evaluation. A polyphasic taxonomic approach was employed which included: morphological observations by light microscopy and scanning electron microscopy, maximum parsimony, maximum likelihood and Bayesian analysis of 16S rDNA sequences, secondary structural comparisons of 16S-23S rRNA Internal Transcribed Spacer sequences, and finally environmental data. The 17 cyanobacterial isolates formed a diverse group that contained filamentous, coccoid and heterocytous strains. These included representatives of the polyphyletic genera of Synechococcus and Phormidium, and the orders Oscillatoriales, Spirulinales, Chroococcales and Nostocales. After analysis, at least 6 new taxa at the genus level provide new evidence in the taxonomy of Cyanobacteria and highlight the abundant diversity of thermal spring environments with many potential endemic species or ecotypes. (C) 2016 Elsevier Inc. All rights reserved.
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