C and D, Hypocotyl lengths and free-running periods of indicated plants lines. Data of ~75 plants from 3 independent experiments were averaged, different letters indicate statistically significant differences (p<0.01, one-way ANOVA followed by Tukey-Kramer HSD test). The middle line of the box represents the median, the x in the box represents the mean. The bottom line and the top line of the box represent 1st and 3rd quartile, respectively. The whiskers extend from the ends of the box to the minimum value and maximum value. 