Auxin response factors (ARFs) are transcriptional factors that bind specifically to the DNA sequence 5'-TGTCTC-3' found in the auxin-responsive promoter elements (AuxREs). Could act as transcriptional activator or repressor. Formation of heterodimers with Aux/IAA proteins may alter their ability to modulate early auxin response genes expression. Involved in the establishment or elaboration of tissue patterning during gynoecial development. Homo and heterodimers. Expressed in the whole plant. Detected during gynoecium development. Negatively regulated by AHL21/GIK. Double mutations in this protein and in ARF4 protein significantly suppresses the adaxial development defect of leaves of the AS2 and RH10 proteins double mutant at high temperatures. Belongs to the ARF family.