Table 3.
Effect of different concentrations of phenolic compounds from the Cistus ladanifer exudate on Allium cepa root length and cotyledon, expressed as the percentage relative to the control. Four replicates of each treatment (n = 4 × 50 = 200 seeds in total for each solution).
| Allium cepa | ||||||
|---|---|---|---|---|---|---|
| %Root Length | %Cotyledon Length | |||||
| Treatment | 1 mM | 0.5 mM | 0.1 mM | 1 mM | 0.5 mM | 0.1 mM |
| Paper | ||||||
| p-cresol | 51.0 * a ´ | 78.3 * b ´ | 79.4 b ´ | 48.5 * a ´ | 83.0 * b ´ | 92.7 c ´ |
| 2-phenylethanol | 50.5 * a ´ | 66.0 * b ´ | 63.1 * b ´ | 71.9 * a ´ | 62.1 * a ´ | 65.5 * a |
| 3-phenyl-1-propanol | 33.0 * a ´ | 25.6 * a | 87.5 * b ´ | 31.5 * a ´ | 51.9 * b ´ | 108.0 c ´ |
| Mixture of compounds | 13.5 * a | 28.0 * b | 47.9 * c | 0.0 * a | 8.5 * b | 61.7 * c |
| Soil | ||||||
| p-cresol | 73.1 * a ´ | 107.0 b | 107.2 b ´ | 77.7 * a | 112.4 b ´ | 113.8 b ´ |
| 2-phenylethanol | 108.3 a ´ | 110.9 a | 103.7 a ´ | 116.6 a ´ | 114.2 a ´ | 111.3 a ´ |
| 3-phenyl-1-propanol | 102.6 a ´ | 116.9 a ´ | 100.0 a ´ | 109.9 a ´ | 112.8 a ´ | 115.0 a ´ |
| Mixture of compounds | 89.9 * a | 101.7 b | 92.6 ab | 80.7 * a | 83.3 * a | 82.4 * a |
* Significantly different from controls. ´ Significantly different from mixture of compounds. a, b, c: differences in small letters indicate significant differences between concentrations of the same index and for each treatment. p < 0.05 (Mann–Whitney U test).