A-F Shown are hypocotyl lengths of cRL-grown 4-day-old seedlings of toc1 complemented with wild-type TOC1 (A), 5X (B), T135A (C), S175A (D) driven by TOC1 native promoter and wild-type TOC1 (E), 5X (F) driven by 35S promoter at sequential fluent rates. Different letters indicate statistically significant differences between genotypes (p<0.01, one-way ANOVA followed by Tukey-Kramer HSD test), error bars indicate SEM. Data are representative of three biological trials with similar results. 