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Fig. 1. Floral phenotypes caused by hen3 mutations. (A) A wild-type flower with stamens in the third whorl (arrow) and carpels in the fourth whorl. (B) A hua1-1 hua2-1 flower with stamens in the third whorl (arrow) and carpels in the fourth whorl. (C) A hua1-1 hua2-1 hen3-1 flower with petals in the third whorl (arrow) and an enlarged gynoecium with a gynophore at the base (arrowhead), which indicates that the gynoecium has partial floral character. (D) A hua1-1 hua2-1 hen3-2 flower with petals in the third whorl (arrow) and an enlarged gynoecium in the center. (E) A hua1-1 hua2-1 hen3-3 flower with an additional flower in the center (arrowhead). The blue arrows indicate three unfused carpels. (F) A hen3-1 flower with normal organ identity. (G) Epidermal valve cells with a smooth surface from the bottom of a hua1-1 hua2-1 ovary. (H) Epidermal valve cells from a hua1-1 hua2-1 hen3-1 ovary. The cells have epicuticular striations similar to epidermal cells on sepals. (I) A hua1-1 hua2-1 hen3-1 ag-1 flower. (J) A hen3-1 ag-1 flower. The numbers indicate the floral whorls. The fourth whorl sepals are largely transformed to petals. (K) A clv1-4 flower. (L) A hua1-1 hua2-1 hen3-1 clv1-4 flower, with a massive amount of undifferentiated cells in the center. Scale bars: 10 µm in G,H; 1 mm in J-L.





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