Plays a role in root, shoot and flower development. Probably required for normal root and shoot meristem organization and maintenance and the proper expression of PIN and PLT genes (PubMed:19000164). Involved in leaf vasculature patterning (PubMed:18643975). Expressed in lateral root cap, columella, meristem and quiescent center (QC) (PubMed:19000164). Expressed in young leaves (PubMed:18643975). Dwarf plants with variable number of cotyledons, short petioles in leaves and impaired flowering (PubMed:18643975, PubMed:19000164). Defects in venation pattern in leaves (PubMed:18643975). Belongs to the SNU66/SART1 family.