Figure 6.

HDA15 and HY5 corepress the expression of cell wall organization and auxin signaling-related genes in Arabidopsis seedlings. Two-d–old seedlings grown under red light conditions (13.12 μmol m⁻² s⁻¹) were harvested for analysis. UBQ10 was used as an internal control. A, RT-qPCR analysis of the expression levels of cell wall organization and auxin signaling-related genes in 2-d–old Col-0, hda15-1, and hy5-215 seedlings. Asterisks indicate the significant difference from that of Col-0 (P < 0.05, Student’s t test; n = 3). B, RT-qPCR analysis of the expression levels of the genes involved in cell wall organization and auxin signaling in Col-0 and 35S:HDA15-GFP-1 seedlings. Asterisks indicate the significant difference (P < 0.05, Student’s t test; n = 3). C, RT-qPCR analysis of the expression levels of cell wall organization and auxin signaling-related genes in Col-0, 35S:HY5-GFP-1, and 35S:HY5-GFP hda15-1 seedlings. Asterisks indicate statistically significant differences between 35S:HY5-GFP-1 and 35S:HY5-GFP hda15-1 (P < 0.05, Student’s t test; n = 3).