Figure 7.

Hypocotyl length and expression of GA-associated genes under GA treatment in Arabidopsis. Phenotypes of WT and TaCOMT transgenic Arabidopsis seeds growth on medium containing 0, 0.5, 1 and 2 µΜ GA for a week (bar = 2 mm) (A). Statistical results of hypocotyl length of WT and transgenic plants treated with different concentrations of GA (B). Two-week-old Arabidopsis seedlings were transferred to ½ MS medium containing 100 µM GA for 24 h, and then the transcription level of GA-responsive genes was analyzed (C). Expression of AtActin as a loading control. At least 25 seedlings per phenotype were counted. The data were shown as the means ± SDs (n = 25) of three experiments. An ANOVA test showed significant differences (* p < 0.05, ** p < 0.01).