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Scanning electron micrographs of stage 3-VI ovules (anthesis; stages from Schneitz et al. 1995). (A) Wild-type Ler. (B) sin2-1. (C and D) sin2-2 plants. In D, the gradation in severity of effects of sin2-2 from the base to the apex of the carpel is apparent. f, funiculus; ii, inner integument; n, nucellus; oi, outer integument. Bar, 50 μm (A–C) and 100 μm (D).
