Fig. 5.

Phenotypes of cyp714b1 cyp714b2 double mutant plants. (A) Twenty-two-week-old plants of F₂ WT, cyp714b1, and cyp714b2 single and the double mutant. (Scale bar, 20 cm.) (B) Internode length of F₃ WT (line 57), cyp714b1 (line 1), cyp714b2 (line 4), and the double mutant (line 32). Mean ± SEM, n = 5–6. Letters above bars indicate statistically significant differences between samples by one-way ANOVA with Tukey-Kramer multiple comparison test (P < 0.01). (C) Panicle exertion (heading performance) of Nipponbare (NB), double mutant, and F₃ WT. (Scale bar, 15 cm.) (D) Response to exogenous GA₁₂ or GA₄. WTs (NB and HY) and double mutants (F₅ line 32) grown on half-strength Murashige-Skoog medium containing various concentrations of GAs and/or uniconazole (UNI). Mean ± SEM, n = 6–11. *Significant difference between dm32 and WTs (Student t test with Bonferroni corrections, P < 0.001).