Probable downstream regulator of strigolactones signaling. Tetramer (PubMed:26601214). Interacts with D53 (PubMed:24336200). Interacts with WOX1 (PubMed:25697101, PubMed:24336200, PubMed:26601214). Interacts with MOF1 (PubMed:32680975). Expressed in panicles, stems, leaves, spikelets and seed endosperm. Highest expression in endosperm at 7 days after pollination and in flag leaf at 14 days after heading. The N-terminal TOPLESS domain (TPD)(1-209) binds directly to a 12-amino acid LxLxL EAR motif peptide, but no binding if the leucin residues are replaced.