The relative expressions of genes encoding proteins involved in ABA signaling, such as ABI3, ABI4, and ABI5 (a) and HAI1, HAI2, and HAI3 (b), in samples isolated from WT dormant Arabidopsis (Col-0) seeds incubated on water for 20, 36, and 48 h in different light conditions (BL and white light of intensity = 180 µmol m−2 s−1, darkness) at temperature of 25 °C: The transcript level was normalized to reference genes (ACT7, APC2, and HBT) and to the internal control, which was the expression value of ABI3 (Figure 9a) or HAI1 (Figure 9b) obtained in darkness after 20 h of incubation. Three biological and two technical replicates were performed. The bars show the relative units ± SD, letters a-g indicate homogeneous groups for p ≤ 0.05.