Probable transcription factor involved in asmmetric cell division in the cortex/endodermis progenitor cell and in the process of stomata and ligule formation in leaves. Localized around the dividing nucleus during asymmetric division. Expressed in the root endodermis, in the cortex/endodermal initial and in the quiescent center. Not expressed in the shoot apical meristem itself, but strongly in the L1 layer. In the basal portion of the P3 leaf primordium, expressed continuously within the stomatal row. At later stages, expressed in guard mother cell (GMC)-forming cells and in subsidiary mother cell (SMC) just before asymmetric division. Belongs to the GRAS family.