Figure 3.
Biofilm, sliding motility, xanthan gum production, and pathogenicity of X. citri strains. (a) Biofilm formation on polystyrene surface. Values are expressed as the means ± standard deviations of six independent replicates. (b) Sliding motility phenotypes on SB agar medium plates after 48 h of incubation at 28 °C. Values are expressed as the means ± standard deviations of three independent replicates. (c) Xanthan gum production by X. citri strains. (d) Sweet orange leaves microneedle and inoculated with the different X. citri strains (108 CFU/mL). Pictures are representative of five leaves for each strain. wt, wild-type; xanA::Tn5, transposon mutant; xanA::Tn5_c, complemented transposon mutant; ΔxanA, deletion mutant; ΔxanA_c, complemented deletion mutant. * indicates significant difference by t-test (p < 0.05) compared with wt strain.