Figure 5.

Cryptochromes control the circadian rhythm of GA2ox1 mRNA expression. mRNA expression of GA2ox1 and GA2ox2 genes in seedlings grown under long day (LD) or short day (SD) for 10 d and then transferred to continuous white light were examined using RT-PCR. Samples were collected every 3 h for 1 d in photoperiod and 2 d in continuous white light (A and B), or every 2 h for 1 d in long-day photoperiod (C and D). The white/black bars indicate light/dark phases, and the dashed bars indicate subjective night phase under continuous light. The time (hour) of light on of the first day of sample collection is set as zero.