Figure 1. Neighbor-joining tree based on partial 16S rRNA gene sequences showing the phylogenetic relationship of the 20 isolates and their closest relatives. The phylogenetic tree was generated using approximately 1,400 bp of 16S rRNA sequence by the neighbor-joining method. Reference strains used in the tree can be retrieved with their accession numbers in GenBank. Scale bar equals approximately 2% nucleotide divergence.
