Response of ARAG1 transgenic and wild-type seedlings to ABA treatment. (A) Wild-type and ARAG1 transgenic rice seedlings after 3 d germination were treated with 0 µm ABA (A1), 2 µm ABA (A2), 4 µm ABA (A3) or 8 µm ABA (A4) for 10 d. In each panel, from left to right, the seedlings are wild type, OE line 2 or AS line 9, respectively. (B–D) Morphological parameters of wild-type and ARAG1 transgenic rice seedlings after treatment for 10 d. (B) Length of primary root (mm); (C) height of shoot (mm); (D) number of adventitious roots. Error bars indicate s.d. (n = 30).