Trans-acting factor that binds specifically to the consensus nucleotide sequence 5'-TNCGTACAA-3'. Binds specifically to the 5'-GTAC-3' core sequence. Involved in development and floral organogenesis. Required for ovule differentiation, pollen production, filament elongation, seed formation and siliques elongation. Also seems to play a role in the formation of trichomes on sepals. May positively modulate gibberellin (GA) signaling in flower. Binds 2 Zn(2+) ions per subunit. Mostly located in nucleus. A number of isoforms are produced. According to EST sequences. Expressed in shoot apical region and early floral tissues. Transcripts levels increase in developing pollen sacs, and decrease in later stage of anther development. Strongly expressed in the placental region of the carpels. Expressed during plant development. During pollen development, required for crosporogenesis that leads to archesporial formation and for the histogenesis of the microsporangia. During ovules development, involved in the transition to meiosis of the megaspore mother cells. The SBP-type zinc finger is required for the binding to DNA.