FIGURE 1.

Tomato root exudates collection and effects on relative growth increment of Bacillus cereus AR156 and Ralstonia solanacearum HN4. (A) Tomato root exudates were collected in a split-root system. Root bundle in tube A was inoculated with water or cell culture of B. cereus AR156, and root exudates was collected in tube B with spatial separation from potential interference of B. cereus AR156 metabolite. (B) Relative growth increment of Bacillus cereus AR156 and Ralstonia solanacearum HN4 in minimal medium containing different root exudates. Tomato root exudate induced by Bacillus cereus AR156 (1 × 10⁷ CFU/mL) (REB); Tomato root exudate induced by sterile water (REW). The mean and standard error values of three biological replicates are reported for each treatment. Different letters within a column indicate significantly differences 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.