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. 2013 Jan 11;161(3):1242–1250. doi: 10.1104/pp.112.212084

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© 2013 American Society of Plant Biologists. All Rights Reserved.

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Figure 3. — Surgical and genetic removal of sepals restores straight growth of petals. A, Flower bud of fop1-1 at stage 11. Sepal on the abaxial side is removed. Petals are shown with arrows. B, The same flower with A after 3 d, showing the side of the sepal removal. C, A sepal-removed flower at the stage when petals have already folded (arrows). D, The same flower with C after 3 d, with the straight growth of petals. E, Scanning electron microscopy image of petal epidermis in fop1-1. Surface of epidermal cells, especially those at the marginal region, are flattened. F, Scanning electron microscopy image of petal epidermis in fop1-1, where a sepal has been removed and petals grow straight. G, prs-1 flower. H, fop1-1 prs-1 double mutant flower. Petals of the double mutant are not folded. I, ap3-5 flower. J, ap3-5 fop1-1 double mutant flower. Bars = 500 μm (A–D) and 50 μm (E and F).