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Phylogenetic placement of Phz+ Pseudomonas spp. isolates in the “P. fluorescens” and “P. gessardii” subgroups as defined by Mulet et al. (7). Eighty-eight representative Phz+ isolates (n′) were analyzed alongside 14 Pseudomonas type strains, including the outgroup P. fragi ATCC 4973T. The total number of strains defined by BOX-PCR in this study (n) is also indicated. The scale bar indicates the number of nucleotide substitutions per site.
