Fig. 1

Phenotypic comparisons between WT and theostkpr1–2mutant. a Plants after bolting. b Rice panicles at the heading stage. c Spikelets at the heading stage. d Spikelets after removal of the lemma and palea.eAnther at stage 13 of WT.fStage 13 WT pollen grains stained with 2% I₂-KI solution. Mature pollen grains are stained.gAnther at stage 13 ofostkpr1–2mutant.hContents of stage 13 anthers ofostkpr1–2彩色智慧h 2% I₂-KI solution showing no pollen grains. gl, glume; le, lemma; pa, palea; st, stamen. Bars = 2 mm inc, 1 mm indande, and 100 μm infandg