Inhibitory activity of naringenin against R. solanacearum. A) Growth of Rs10-GFP2 in NB medium with different concentrations of naringenin. Images were digitally extracted for comparison. B) Growth rate of R. solanacearum at 0 to 24 h in different concentrations of naringenin. C) Number of Rs10-GFP2 at 0 and 12 h under different concentrations of naringenin treatment. D) Imaging of Rs10-GFP2 under fluorescence microscope at 0 and 24 h with different concentrations of naringenin treatment. Notes: hours post-infection (hpi). Fold change (FC). Error bars represent standard deviation (Sd). Between letters represent significant differences (One-way ANOVA, P < 0.05). OD, optical density.