Figure 7.

Induction by a single red-light (R) pulse or reversion by far-red (FR) light following red light of the accumulation of CAB mRNA in etiolated cue mutant seedlings. Five-day-old etiolated seedlings were treated (or not) with a pulse of light, as indicated in “Materials and Methods,” and returned to darkness for 4 h before harvesting. The number above each bar represents the derepression by a red-light pulse or the ratio of red light to the basal dark (D) level. CAB mRNA was not detected in the cue3 samples. n.d., None detected.