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Fig. 2. The phenotypes of pfs2 mutants. (A) Wild-type ovules have an outer integument (oi), inner integument (ii), and embryo sac (es). (B) In pfs2-1 mutants, the embryo sac, or gametophyte, usually does not completely differentiate. In this ovule, the embryo sac failed to differentiate in the nucellus (n). (C) When the embryo sac does form in this mutant, it frequently has fewer than the normal complement of seven cells. This embryo sac has two cells. (D) In 5% of the pfs2 mutant ovules, the embryo sac is indistinguishable from wild type. (E) Wild-type leaves. (F) Wild-type petal. (G) In addition to the aberrant ovule phenotype, the leaves and petals of pfs2 mutants displayed abnormalities. In pfs2 mutants, the leaves curled downward and (H) the petal margins were ragged and wavy. Scale bars: 20 µm.





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