Figure 1.

Phylogenetic tree of 179 Cyanobacteria species. The phylogenetic tree was inferred using the concatenated sequences. Some of the phylogenetic relationships among species are compressed in Figure 1, but the complete phylogenetic tree is shown in Figure S1. Black squares indicate diazotrophic Cyanobacteria. Diazotrophic Cyanobacteria belonging to groups I–V are shown in brackets. Diazotrophic cyanobacteria with no closely related species were not included in the groups. Bootstrap values are shown at the internal branches (<100).