Fig. 1.

Phylogenetic tree estimated using the ML method with partial sequences of the chromosomal protein encoding gene rpoB using the phyml program. The alignment length was 642 nucleotides from positions 3262 to 3903 of the rpoB gene of Sinorhizobium meliloti 1021. Only bootstrap values ≥50% are shown. Type strains are indicated by superscript T. The Acaciella angustissima strains are shown in bold. Only haplotypes were included in each terminal branch. The accession numbers for the sequences are indicated within parentheses. Those generated in this work are shown in bold.