Figure 5.

BBX24 and BBX21 regulate the transcription of anthocyanin biosynthetic genes dependent on their C-terminal domains. A to C, Anthocyanin content relative to fresh weight of 5-d-old seedlings grown in 100, 10, and 1 μmol m⁻² s⁻¹ of red (A), blue (B), and far-red (C) light, respectively. Error bars represent se, n = 4. D, Expression levels of CHS, CHI, F3H, F3′H, LDOX, and DFR in 4-d-old wild-type, GFP-BBX24, GFP-BBX21, GFP-BB24C21, and GFP-BB21C24 seedlings grown in 100 μmol m⁻² s⁻¹ of red light shown on a logarithmic scale. Error bars represent se, n = 4. * and ** indicates P < 0.05 and P < 0.01, respectively, compared to wild type as determined by one-way ANOVA, P ≤ 0.05. WT, wild type.