Fig. 7. Phenotypes of seedlings that were grown for 12 days on vertical GMA plates. (A) Seedlings grown at 22°C. (B) Seedlings grown at 28°C. (C-J) Epidermis of the hypocotyl (C-F) and primary root (G-J) of the wild type and rid5. (C,G) Wild type at 22°C, and (D,H) at 28°C. (E,I) rid5 at 22°C. (F,J) rid5 at 28°C. Arrows indicate the direction of growth. Epidermal cell files of the rid5 seedling showed left-handed helical growth at 28°C. Arrowheads in (J) indicate branched root hairs. (K-M) True leaves of the wild type (K) and rid3 (L,M) at 28°C. Bars in (A,B), 1 cm. Scale bars: (C-J) 200 µm; (K,L,M), 500 µm.