Figure 2.

The effect of different concentrations of propiophenone, 4′-methylacetophenone, 2′,4′-dimethylacetophenone, and the mixture of the three compounds on the total germination (%GT) and germination rate (%GR) of Lactuca sativa, expressed as the percentage relative to the control. Four replicates of each treatment were performed (n = 4 × 50 = 200 seeds in total for each solution). * Significantly different from the controls; 1, 2, 3: differences numbers indicate significant differences between treatments of the same index and for each concentration. 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).