Probable transcription factor that plays a central role in mediating RGF1 hormone peptide signaling leading to the production of reactive oxygen species (ROS) in roots to modulate meristem size and root growth, probably via oxidative post-translational modification of the transcription factor PLETHORA (e.g. PLT1 and PLT2). Expressed predominantly in root meristematic zones. Induced by RGF1 peptides. Small root meristem and low root growth rate.