Fig. 3From: Genetic divergence among toxic and non-toxic cyanobacteria of the dry zone of Sri LankaPhylogenetic tree for cyanobacterial 16S rRNA gene sequences constructed using Neighbour Joining (NJ) method. The scale bar represents five base substitutions for 100 nucleotide positions. Bootstrap percentages above 50% calculated from 100 re-sampling are indicated at the nodesBack to article page