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Significance Proper repression of the floral homeotic genes AP3, PI, and AG in leaf primordia and activation of them in floral meristems is essential for reproductive fitness. Many studies have… Click to show full abstract
Significance Proper repression of the floral homeotic genes AP3, PI, and AG in leaf primordia and activation of them in floral meristems is essential for reproductive fitness. Many studies have revealed molecular details about the activation of AP3, PI, and AG in floral meristems, but relatively less is known about how they are repressed in leaves and how this repression is lifted in floral meristems. Two genes encoding Arabidopsis ZINC FINGER PROTEIN (ZFP) transcription factors, ZP1 and ZFP8, are highly expressed in leaf primordia and down-regulated in floral primordia. Here, we show that ZP1 and ZFP8 repress these floral homeotic genes in leaves. LFY and AP1 down-regulate ZP1 and ZFP8 in floral meristems, lifting the repression on floral homeotic genes.
Journal Title: Proceedings of the National Academy of Sciences of the United States of America
Year Published: 2023
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