Probable transcription factor. Controls central cell differentiation during female gametophyte development. Interacts with PHE1/AGL37, PHE2/AGL38, AGL80 and AGL86. Forms a heterodimer with AGL80. The transport to the nucleus is dependent on dimerization with AGL80. Expressed exclusively in the central cell of the female gametophyte and in early endosperm. Expressed in the final stages of embryo sac development. Plants lacking AGL61 show a reduced size of the central cell and a reduced or absent central cell vacuole. When fertilized, the central cell fails to give rise to endosperm and the embryo sac degenerates. However, mutated female gametophytesol are not defective in pollen tube guidance and the synergid function is not impaired. This protein was called 'DIANA' after the virginal Roman goddess of the hunt.