Figure 2. Role of DSF extracted from Xac ΔrpfC mutants.
(a) Strains of Xcc with mutations in rpfF and rpfC genes grow in an aggregated fashion in L medium, whereas the wild-type strain grows in a dispersed fashion. Addition of DSF from the Xac ΔrpfC mutant to rpfF strains, but not to rpfC strains of Xcc, causes dispersed growth.
(b) Bioassay of DSF extracted from culture supernatants of Xac rpfF mutants (1), Xcc rpfF mutants(2), Xac wild-type (3), Xac rpfC mutant (4), Xcc wild-type (5) and Xcc rpfC strains (6).