FIGURE 3.

Antagonistic effects of components in tomato root exudates induced by Bacillus cereus AR156 against Ralstonia solanacearum HN4. (A) In vitro antagonism test of components in tomato root exudates induced by B. cereus AR156 against R. solanacearum HN4. Arrangement of tested compositions was described in (B). Bacillus amyloliquefaciens HSSN09 and Bacillus cereus AR156 strains were tested in 5 × 10⁷ CFU/mL, HSSN09 FBE indicates the fermentation broth extract of Bacillus amyloliquefaciens HSSN09 in 20 mg/mL, tested root exudates was in the concentration of 8.74 mg/mL, other tested components were in the concentration of 100 mM. The results in (A) are quantified in (C). The mean and standard error values of three biological replicates are reported for each treatment. Different letters within a column indicate significantly different among treatments according to the Duncan’s multiple range tests test (P < 0.05). The experiment was carried out three times and one representative experiment is reported.