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Fig. 3 | BMC Plant Biology

Fig. 3

From: Genes WHEAT FRIZZY PANICLE and SHAM RAMIFICATION 2 independently regulate differentiation of floral meristems in wheat

Fig. 3

False-true spike ramification in tetraploid T. turgidum wheat. a-d, Illustration of the spike structure in the T. turgidum PI 67339 (a), harboring elongated spikelets (b) with grains in the basal part (d) and ectopic spikelets in the distal part (c). e, Schematic illustration of an altered spikelet structure of the false-true spike ramification phenotype, showing locations of florets (f ), ectopic spikelets (es) and an ectopic terminal spikelet (ets), and structure of a WT-floret (right, bottom). f, Scanning electron microscopy image of an elongated spikelet dissected from the false-true ramified spike, showing the spikelet glumes (gl) and lemmas (l) of a basal pair of florets (in green), three developing ectopic spikelets at the floret differentiation stage (in gray) and an ectopic terminal spikelet (ets) at the early floret differentiation stage (in red). g-k, SEM images of the PI 67339 inflorescence at various developmental stages. g and h, Early floret differentiation stage. i, beginning of the floret differentiation stage, when the basal floret begin to differentiate. j and k, Development of ectopic spikelets in the distal part of altered spikelet. Bars =200 μm. f, floret with floret organ primordia; f*, ft, floret of an ectopic spikelet (es) and an ectopic terminal spikelet (ets), respectively; fm, floret meristem; fm*, fmt, floret meristem of es and ets, respectively; gl, glume; gl*, glt, glume of es and ets, respectively; l, lemma; l*, lt, lemmas of es and ets, respectively; sm, spikelet meristem; sm*, smt, spikelet meristems of es and ets, respectively

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