Figure 1: Phylogenetic relationships among 16S ribosomal RNA genes from the panel strain and 28 Pseudomonas type strains. The nine biosurfactant-producing strains, the two biosurfactant negative mutants, SBW25 and Pf0-1 strains are in bold print. The unrooted dendrogram was carried out using the Neighbour-Joining algorithm. Numbers on tree branches report bootstrap results from Neighbour-Joining (above branch) and Maximum Likelihood (below branch) analyses for those branches having ≥50% support. A and B are two distinct phylogenic groups in P.fluorescens r-cluster.