Figure 1

Co-occurrence network of the PBFC genes for the 25 PGPR genomes.
The genes are depicted with a colored circle according to their encoded function. Each co-occurrence is represented by an edge linking the corresponding genes and materialized by a line (based on Fisher exact test; P < 0.05). Several PBFC genes found in PGPR (i.e. pqqF, pqqG, budC, nirK, ppdC and acdS) did not display significant co-occurrence with any other(s).