Figure 4. Effect of volatile organic compounds produced by Bacillus amyloliquefaciens SQR-9 on biofilm formation (A), exopolysaccharides production (B) and tomato root colonization (C) by tomato wilt pathogen Ralstonia solanacearum.

Error bars indicate standard deviations of three replicates and different letters describe significant differences as determined by student’s t-test at P = 0.05 within the same data group.