Table 3 The inhibitory effect of cell-free filtrates of X. nematophila YL001 on the selected bacterial pathogens at varying initial pH
From: Regulation of antimicrobial activity and xenocoumacins biosynthesis by pH in Xenorhabdus nematophila
Bacteria | Antibiotic activity (U/mL)1 | ||||
|---|---|---|---|---|---|
pH 5.5 | pH 6.5 | pH 7.0 | pH 7.5 | pH 8.5 | |
Bacillus subtilis | 96.0 ± 17.0c | 194.0 ± 6.0b | 205.0 ± 13.0a | 205.0 ± 6.0a | 210.0 ± 29.0a |
Bacillus thuringiensis | 8.0 ± 0.6e | 77.0 ± 1.2d | 73.0 ± 1.2c | 81.0 ± 6.0b | 92.0 ± 1.2a |
Bacillus cereus | 17.0 ± 1.2d | 44.0 ± 6.0c | 84.0 ± 6.0b | 84.0 ± 3.0b | 95.0 ± 1.7a |
Pseudomonas syringae pv. actinidiae | 13.0 ± 6.0d | 84.0 ± 2.3c | 107.0 ± 12.0b | 128.0 ± 2.9a | 132.0 ± 6.0a |
Xanthomonas campestris pv. oryzae | 15.0 ± 1.2c | 26.0 ± 1.2b | 24.0 ± 6b | 32.3 ± 2ab | 34.0 ± 3.0a |
Erwinia carotorora subsp. carotovora | 18.0 ± 0.6b | 9.0 ± 2.9c | 13.0 ± 0.6b | 20.0 ± 0.6a | 22.7 ± 1.5a |