Morphological features and gravitropism of miz2 and wild-type (WT) plants. WT (A) and miz2 (E) seedlings; vascular patterns in the cotyledons of WT (B) and miz2 (F) seedlings; iodine-stained columella cells of WT (C) and miz2 (G) plants; and inflorescence of 4-week-old WT (D) and miz2 (H) seedlings are shown. Scale bars = 2 mm (A and E), 500 μm (B and F), 50 μm (C and G), and 5 cm (D and H). I and J, Gravitropism of WT and miz2 seedling roots. Curvature (I) and growth (J) were measured 0, 2, 4, 8, and 12 h after gravitropic stimulation. White circles, WT; black circles, miz2. Data represents the means ± sd of three independent experiments (n = 20 for each experiment).