3). Because loss-of-function mutations in one FLIP gene lead to a decrease in expres- sion of other FLIP genes, it is difficult to ascertain the exact role of each FLIP gene in the floral program. Nevertheless, LFY appears to suppress leaf development and, within the flower, inhibits internode elon- gation while promoting Class B (petal and stamen) and Class C (stamen and carpel) organ identity (Fig. 3)5,21. In contrast AP1/CAL appears to suppress branching
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