Figure 2.

Effects of WD on ABA abundance and expression of ABA-regulated genes. A and B, ABA concentrations (A) and transcript abundance of ABA-regulated genes RAB18, RD29A, and RD29B in roots (B) of plants subjected from 18 DAS to a 5-d-long treatment with the indicated PEG concentrations. The dotted line in (B) represents the normalized expression level in control conditions. Mean values ± se were obtained from 15 plants grown in three independent experiments (n = 3). ‘Homogeneous group’ statistics were calculated through ANOVA, where mean values with different letters are significantly different according to lsd test at P ≤ 0.05 (A). FW, fresh weight.