Expression of OsMADS6 in the wild type and the mof1 mutant. A to D, Wild-type spikelet. A, Sp4; B, Sp5 to Sp6; C, Sp7; D, Sp8. E to H, Group I mof1 spikelet with an extra lemma-like organ and two reduced paleae. E, Sp4; F, Sp5 to Sp6; G, Sp7; H, Sp8. I to L, Group II mof1 spikelet with a reduced palea. I, Sp4; J, Sp5 to Sp6; K, Sp7; L, Sp8. ell, Extra lemma-like organ; fm, floral meristem; le, lemma; lo, lodicule; pa, palea; pal, palea-like organ. Bars = 50 µm.