Figure 2
From: Regulatory role of FZP in the determination of panicle branching and spikelet formation in rice
Phenotypes of spikelets and floral organs in the OX-FZP-(fzp-11) (A–H,M–R) and OX-FZP-(ZH11) plants (I–L).
(A) Spikelet with a normal lemma and palea but sterile stamen. (B) Abnormal spikelet with an elongated empty glume (eeg) similar to a lemma. (C) Abnormal spikelet with an eeg similar to a palea. (D) Additional ectopic spikelet formed at the end of the branch. (E–H) Different stages of spikelet and/or floral organs after heading. The white arrows indicate abortive stamens; the white arrowhead indicates an enlarged ovary/carpel. (I) Spikelet with a normal lemma and palea but sterile stamen. (J,K) Abnormal spikelets. White arrowheads indicate enlarged lodicules (J) and an ectopic spikelet (K). (L) Floral organs. White arrows indicate abnormal stamens and the white arrowhead indicates an enlarged ovary/carpel. (M,N) Scanning electron microscopy images of wild-type (DJ) and OX-FZP-(fzp-11) spikelets in the early developmental stage, Scale bars = 20 μm. (O,P) Transverse sections of flowers from wild-type (DJ) and OX-FZP-(fzp-11). (Q and R) Diagrams of wild-type and OX-FZP flowers. The lemma and palea are indicated in dark green; lodicules, stamens and carpels are indicated in gray, light green and pink, respectively. Abnormal lodicules, fewer stamens and enlarged carpels were observed in the flowers of OX-FZP plants. The lemma and palea were artificially removed in (E–G),(L). l, lemma; p, palea; eg, empty glume; rg, rudimentary glume; egg, elongated empty glume; st, stamen; ca, carpel; lo, lodicule; ov, ovary; fm, floral meristem.
