Table 4.
In vitro phytotoxic effect of different doses of E. citriodora (EC), L. angustifolia (LA), and P. sylvestris (PS) essential oils on tomato (TO) and cucumber (CU) seedling growth.
| * Dose | Control | 0.125 | 0.25 | 0.5 | 1 | ||
|---|---|---|---|---|---|---|---|
| EC | TO | Hyp | 7.3 ± 1.4 a | 6.8 ± 1.8 a | 5.0 ± 1.2 a,b | 2.7 ± 0.5 a,b | 0.8 ± 0.4 b |
| Rad | 16.7 ± 1.5 a | 14.1 ± 1.7 a | 15.1 ± 1.5 a | 6.3 ± 1.3 b | 3.4 ± 1.7 b | ||
| CU | Hyp | 8.4 ± 0.1 a | 8.3 ± 0.4 a | 8.4 ± 0.2 a | 8.4 ± 0.1 a | 8.5 ± 0.9 a | |
| Rad | 23.1 ± 1.5 a | 20.2 ± 0.5 a | 15.3 ± 0.5 b | 15.1 ± 0.9 b | 13.3 ± 0.4 b | ||
| LA | TO | Hyp | 7.3 ± 1.4 a | 7.2 ± 0.7 a | 4.9 ± 0.9 a,b | 2.1 ± 0.8 b,c | 0.5 ± 0.3 c |
| Rad | 16.7 ± 1.5 a | 16.4 ± 0.9 a | 11.6 ± 1.1 a,b | 7.3 ± 2.1 b,c | 2.8 ± 2.0 c | ||
| CU | Hyp | 8.4 ± 0.1 a | 8.3 ± 1.0 a | 8.1 ± 0.9 a | 8.3 ± 0.9 a | 8.3 ± 0.04 a | |
| Rad | 23.1 ± 1.5 a | 18.9 ± 0.5 b | 17.1 ± 0.5 b,c | 15.6 ± 1.0 b,c | 14.4 ± 0.7 c | ||
| PS | TO | Hyp | 12.6 ± 1.6 a | 3.8 ± 1.2 b | 4.0 ± 0.7 b | 3.2 ± 0.7 b | 3.5 ± 0.3 b |
| Rad | 18.1 ± 1.0 a | 9.4 ± 1.0 b | 10.6 ± 0.5 b | 6.8 ± 1.7 b | 6.7 ± 0.4 b | ||
| CU | Hyp | 8.5 ± 0.9 a | 8.6 ± 0.2 a | 8.4 ± 0.3 a | 8.4 ± 0.8 a | 7.7 ± 0.9 a | |
| Rad | 21.2 ± 1.0 a | 17.8 ± 0.6 a,b | 16.3 ± 1.1 b | 16.5 ± 0.8 b | 15.2 ± 0.8 b | ||
Values are the mean percentage of five replications ± standard error, after 14 days of incubation. Means followed by different letters in the same row indicate significantly difference at p < 0.05, according to T3 Dunnett and Tukey tests. * Dose: µL/mL; Hyp: Hypocotyl (mm); Rad: Radicle (mm).