Figure 1.

Phenotypes of the sts1 and si1 Mutants.

(A) Wild-type tassel floret.

(B) and (C) sts1-1 (B) and si1-mum2 (C) tassel florets showing conversion of both stamens and lodicules into lemma/palea-like organs.

(D) Wild-type ear.

(E) sts1-1 mutant ear.

(F) Wild-type ear spikelet (above) and floret (below) with glumes removed.

(G) and (H) sts1-1 (G) and si-mum2 (H) mutant ear spikelets (above) and florets (below) with glumes removed showing transformation of aborted stamens to carpels

(I) Floral diagrams of wild-type and B class mutant ear and tassel florets.

G, gynoecium; St, stamen; TSt, transformed stamen; L, lodicule; TL, transformed lodicule; P, palea; Le, lemma. Bars = 2 cm in (D) and (E) and 2 mm in all other panels.