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Phenotypes of mtpi-2 and mtngl9 mutants. (A) Wild-type Medicago truncatula flower. Petals present in the second whorl (W2), and stamens and carpel in W3+W4, respectively. (B) mtpi-2 flower showing full conversion of petals into sepals and of stamens into carpels. (C) mtngl9 flowers do not show homeotic floral alterations.
