Glycosyltransferase required for normal cell adhesion and cell wall integrity. Glycan metabolism. Ubiquitous. Strong expression in young seedlings, particularly at the junction between hypocotyl and root, in emerging cotyledons, and in parts of the roots. Also detected in the inflorescence (sepals, petals, mature pollen and siliques) and rosette leaves. Cell dissociation, spontaneous breakage and ectopic organ fusion. Affected embryo development. Increased arabinosyl and decreased galactosyl residues content in the cell wall. Belongs to the glycosyltransferase GT106 family.