Figure 1. Diversity and phylogeny of phenazine producing bacteria assembled in this study.

(A) Genomic regions containing the core phenazine biosynthesis genes in diverse bacteria. Core biosynthesis genes (phzA/BCDEFG) are colored as shown in the legend, all other surrounding genes are depicted in gray. (B) Chemical structures of the main phenazine precursors, PCA and PDC. (C) Phylogenetic tree constructed using the concatenated phenazine-biosynthesis protein sequences. Phylum level is color coded according to the legend and specific clades are annotated around the tree (orders in black and genera in gray). Orange bars highlight Xanthomonadales and Burkholderiales species. Tree scale and bootstrap values are depicted in the figure.