Figure 2.

Germination time courses for rice seeds imbibed in water, or in 0.1, 0.5, 1, or 2 mM coumarin. The number of seeds that had germinated was determined every 3 h for 72 h, and the results are presented as the cumulative germination percentage. Data represent the mean ± SE of three biological replicates of 100 seeds each. Significant differences in the data of germination percentage in 0.1, 0.5, 1, and 2 mM coumarin from those in water at each imbibition time point were assessed by Student’s t test (^*p < 0.05; ^**p < 0.01).