Fig. 2
Phylogenetic tree highlighting the position of A. humicireducens SgZ-5T relative to other type strains within the genus Azospirillum . The strains and their corresponding GenBank accession numbers of 16S rRNA genes were indicated in parentheses. The sequences were aligned using Clustal W and the neighbor-joining tree was constructed based on kimura 2-paramenter distance model by using MEGA 5. Bootstrap values above 50 % were obtained from 1000 bootstrap replications. Bar, 0.01 substitutions per nucleotide position. Rhodovulum adriaticum DSM 2781T was used as an outgroup