Fig. 2

Phylogenetic tree showing the relationship of Rhizobium mesoamericanum STM6155 (shown in bold blue print) to Rhizobium spp. and other root nodule bacteria in the order Rhizobiales based on aligned sequences of the 16S rRNA gene (1286 bp intragenic sequence). Mesorhizobium loti LMG6125^T was used as an outgroup. All sites were informative and there were no gap-containing sites. Phylogenetic analyses were performed using MEGA, version 5 [53]. The tree was built using the Maximum-Likelihood method with the General Time Reversible model [54]. Bootstrap analysis [55] with 500 replicates was performed to assess the support of the clusters. Type strains are indicated with a superscript T. Strains with a genome sequencing project registered in GOLD [31] are in bold font and the GOLD ID is provided after the GenBank accession number, where this is available. Finished genomes are indicated with an asterisk