Table 1.
Antibacterial activity of crude extract and fractions of Robinia pseudoacacia against the tested bacteria.
| Plant Fractions | Concentration (mg/mL) | P. gingivalis | S. mutans | E. coli DH5α |
|---|---|---|---|---|
| Growth Inhibition (%) | ||||
| Crude extract | 0.2 | 88 ± 20.23 ab,*,# | 36 ± 5.79 x | 4 ± 0.89 |
| 0.6 | 100 ± 0.09 a | 66 ± 8.37 vw | 3 ± 0.31 | |
| 1.8 | 100 ± 0.18 a | 73 ± 14.83 v | 1 ± 2.48 | |
| Hexane Fr. | 0.008 | 0 ± 0.00 e | 11 ± 4.63 y | 0 ± 0.00 |
| 0.04 | 60 ± 9.81 c | 29 ± 0.03 x | 0 ± 0.00 | |
| 0.2 | 97 ± 0.31 a | 55 ± 4.11 w | 0 ± 0.00 | |
| CHCl3 Fr. | 0.008 | 10 ± 3.56 e | 0 ± 0.00 z | 4 ± 1.42 |
| 0.04 | 21 ± 0.54 d | 2 ± 0.53 yz | 0 ± 0.00 | |
| 0.2 | 91 ± 1.80 ab | 31 ± 6.25 x | 0 ± 0.00 | |
| EtOAc Fr. | 0.008 | 9 ± 1.05 e | 0 ± 3.65 z | 2 ± 2.76 |
| 0.04 | 8 ± 3.80 e | 5 ± 425 y | 8 ± 1.39 | |
| 0.2 | 82 ± 3.58 b | 0 ± 0.00 z | 2 ± 1.46 | |
| BuOH Fr. | 0.008 | 5 ± 6.72 e | 0 ± 0.00 z | 7 ± 1.36 |
| 0.04 | 7 ± 3.39 e | 0 ± 0.00 z | 9 ± 1.36 | |
| 0.2 | 6 ± 1.79 e | 0 ± 0.00 z | 5 ± 2.94 | |
*: Data are expressed as the mean ± SD; #: Values with different superscript letters in a column are significantly different (p < 0.05).