Potential of Polycyclic Aromatic Hydrocarbon-Degrading Bacterial Isolates to Contribute to Soil Fertility

Figure 1

Evolutionary relationships of isolated soil bacteria. The evolutionary history was inferred using the neighbor-joining method. The percentage of replicate trees in which the associated taxa clustered together in the bootstrap test (1000 replicates) is shown next to the branches. The evolutionary distances were computed using the Jukes-Cantor method. Salmonella typhimurium was used as the outgroup. Phylogenetic analyses were conducted in MEGA6. One bacterial genus representing each OTU identified is depicted. The sequence analysis was carried out using mothur software in which 16 OTUs were generated at similarities of 97%. The relatives of the representative OTUs were obtained from NCBI. The nucleotides sequences of the representative OTUs showed a range of 98% to 100% identity with the homologous sequences reported in GenBank.