Figure 3.

PPD affects diurnal expression rhythms of clock-related genes. Transcript levels were determined in the uppermost fully expanded leaf of 3-week-old NGB5839 (WT) and ppd-3 plants grown under SD (8L:16D) or LD (16L:8D) conditions at 20°C. Values are normalized to the transcript level of the ACTIN reference gene. Each sample consisted of pooled material from two plants, and each data point represents the mean ± se for n = 2 to 6. Light and dark periods are represented by white and black bars, respectively. Asterisks indicate differences between wild-type and mutant values where P < 0.05.