Fig. 4

a Time line production of SID EGYII during the growth of P. aeruginosa strain EGYII DSM 101801 on PYB medium. Values are averages of three readings ± standard error bars. b Well-cut diffusion assay using the indicator strain E. amylovora strain EGY1 DSM 101800 showing the onset of SID EGYII production after 6 h of the growth of the producer bacterial strain on PYB medium