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Fig. 5. Effects of arf gene mutations on flower development. Stage 13 Columbia (A) and arf2-8 flowers (E). Primary inflorescences of Columbia (B), Ws-0 (C) arf1-5 arf2-8 (F) and arf1-4 dsARF2 (G) plants. Abscission zones of Columbia (D) and arf1-5 arf2-8 (H) floral organs. St, stamen; P, petal; Se, sepal. Arrowheads indicate the abscission zone.