Florigen in rice: complex gene network for florigen transcription, florigen activation complex, and multiple functions

► Two florigen genes, Hd3a and RFT1 are essential for flowering in rice. ► Regulation of two florigen genes involves a complex genetic network. ► The florigen activation complex (FAC) composed of Hd3a, 14-3-3, and OsFD1 promotes flowering. ► Examples of multiple functions of florigen are emerging.