Figure 3. Effect of volatile organic compounds produced by Bacillus amyloliquefaciens SQR-9 on the production of antioxidant enzymes: superoxide dismutase (A) and catalase (B) 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.