Table 4.
In vitro antifungal activity of the triterpene glycosides against plant pathogenic fungi.
| Fungal pathogen | IC50 (μg/ml) | ||||
|---|---|---|---|---|---|
| TPG1 | TPG2 | TPG3 | TPG4 | TPG5 | |
| Alternaria porri | >256 | >256 | >256 | >256 | >256 |
| Botrytis cinerea | 34 ± 7* | 24 ± 11* | 44 ± 17* | >256 | 35 ± 7* |
| Colletotrichum coccodes | >256 | >256 | >256 | >256 | >256 |
| Fusarium oxysporum | >256 | >256 | >256 | >256 | >256 |
| Magnaporthe oryzae | 4 ± 0* | 5 ± 1* | 2 ± 0* | >256 | 5 ± 2* |
| Phytophthora infestans | 136 ± 13* | 205 ± 26 | 81 ± 33* | >256 | 128 ± 0* |
IC50 values (μg/ml) represent the mean ± standard deviation of two runs with three replicates. Asterisks indicate significant difference compared with negative controls by Tukey’s test (p < 0.001).