
Figure 1.
Unrooted 16S rDNA tree of completely sequenced rhizobia and Ralstonia/Cupriavidus strains. Rhizobia are in bold. α, β, and γ represent different subdivisions of proteobacteria. The tree was constructed by using the neighbor-joining method. 16S rDNA sequences are available in GenBank. For Ralstonia/Cupriavidus species, which possess nonidentical 16S rDNA, a consensus sequence was determined with DNAstar.











