The First Molecular Characterization of Picocyanobacteria from the Argentine Sea

Figure 4

Neighbor-joining phylogenetic trees based on ntcA gene sequences. Bootstrap values were obtained through 1,000 repetitions. Similar tree topologies were observed by maximum parsimony analyses (not shown). (•) indicates a value >90% and (∘) indicates a value >60%. The ntcA sequence from Synechocystis sp. PCC 6803 was used as outgroup. Synechococcus clades are marked with roman numbers. Sequences from the two Synechococcus isolates are indicated with an asterisk.