Figure 1.

Key developmental stages of early wheat inflorescences. A and E, DR stage with initiating spikelet meristems (SM, indicated by asterisk). B and F, FM stage with the glume primordia (GP) followed by lemma primordia (LP) and floret meristems. C and G, AM stage with stamen and pistil primordia (STP and PP, respectively). STPs are indicated by asterisks. D and H, TS with elongating styles. E to H are magnifications of A to D. A to C and E to G are SEM images. D and H were taken under a stereomicroscope. Bars: A to C, 0.5 mm; D, 1 cm; E, 0.05 mm; F, 0.25 mm; G and H, 0.5 mm.