Transcription factor that promotes early floral meristem identity in synergy with LEAFY. Is required subsequently for the transition of an inflorescence meristem into a floral meristem. Is indispensable for normal development of sepals and petals in flowers. Regulates positively the B class homeotic proteins APETALA3 and PISTILLATA with the cooperation of LEAFY and UFO. Interacts with SEPALLATA3 or AP3/PI heterodimer to form complexes that could be involved in genes regulation during floral meristem development. Regulates positively AGAMOUS in cooperation with LEAFY. Displays a redundant function with CAULIFLOWER in the up-regulation of LEAFY. Together with AGL24 and SVP, controls the identity of the floral meristem and regulates expression of class B, C and E genes. Represses flowering time genes AGL24, SVP and SOC1 in emerging floral meristems. Homodimer capable of binding to CArG-box sequences. Heterodimer with SEP3, AP1 and SVP. Binds AP3/PI to form a ternary complex. Interacts with the SEU-LUG corepressor complex when complexed to AGL24 or SVP. Interacts with AGL15 and AGL16 (PubMed:15805477, PubMed:16679456). Interacts with TT16/AGL32 (PubMed:16080001). Expressed in young flower primordia, later becomes localized to sepals and petals. Expressed at an early stage of floral initiation. Negatively regulated by TFL1 and by the C class floral homeotic protein AGAMOUS. Positively regulated by CAULIFLOWER. Partial conversion of flowers into shoots and a disruption of sepal and petal development.