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Phylogenetic tree based on 16S rRNA gene sequences (1340 bp). The tree was constructed using the neighbour-joining method. Bootstrap values >50% are noted at the nodes.Scale bar = 0.02 substitutions per site. Ar = Arthrospira, Lep = Leptolyngbya, Lyn = Lyngbya, M = Microcoleus, Osc = Oscillatoria, P = Phormidium, T = Tychonema, W = Wilmottia.* anatoxin-producing strains isolated in this study.
