Figure 1: The EPS and swarming assays for all HK gene mutants.

(A) In the EPS production test, a lustreless and applanate colony suggests low EPS production. (B) In the swarming assay, the colony size on the 18-cm diameter Petri dish indicates the swarming ability of Xoo strains. The numbers shown beneath the colonies are abbreviations for the mutants, e.g., 00620 indicates the mutant PXOΔ00620, in which PXO_00620 was deleted.