Promotes lateral root initiation and development, independently of auxin (IAA) and abscisis acid (ABA). Interacts with SNL1 (PubMed:19962994). Interacts with MYB53, MYB92 and MYB93 (PubMed:24902892). Expressed ubiquitously, with higher levels in root tip, pericycle and vasculature. Present in lateral root primordia. Belongs to the beta-catenin family.