Figure 5.

Impaired feedback regulation alleviates dark repression of CPD. A, Feedback regulation of the CPD:LUC and mCPD:LUC transcripts by exogenously applied BL. Northern hybridization and ethidium bromide-stained images of the RNA samples (top and bottom sections, respectively) are shown. B and C, LUC activity of CPD:LUC and mCPD:LUC transgenic plants. Seedlings were germinated and grown in LD for 8 d, and then LUC activity was measured during LD to DD transition from the end of the eighth light period (zero time). Data from the same experiment are plotted both as absolute (B) and normalized (C) values. White and black bars at the time scale indicate light and dark periods, respectively. B and C show a representative measurement.