Probable transcription factor. Controls central cell differentiation during female gametophyte development. Required for the expression of DEMETER and DD46, but not for the expression of FIS2 (PubMed:16798889). Probable transcription factor that may function in the maintenance of the proper function of the central cell in pollen tube attraction (Probable). Interacts with AGL61 and AGL62. Forms a heterodimer with AGL61 (PubMed:15805477, PubMed:18334668, PubMed:18599653, PubMed:18713950). Interacts with MEE14/CBP1 (PubMed:26462908). Expressed in the central cell of the female gametophyte and in early endosperm. Also detected in ovaries, young siliques, roots, leaves, stems, young flowers and anthers. Plants lacking AGL80 (mutant fem111) have defects in central cell and endosperm development.