Transcription factor, which may be involved in the specification and maintenance of the stem cells (QC cells) in the root apical meristem (RAM). Specifically expressed in the central cells of a quiescent center (QC) of the root. Specifically expressed in the hypophysis of the majority of early globular embryos, approximately one round of cell division after the 16-cell stage, but never at the 16-cell stage itself. After the division of the hypophysis, it is detected in the upper lens-shaped cell that gives rise to the QC, but not in the lower daughter cell that gives rise to the central root cap. Subsequently, in heart stage and bent cotyledon stage embryos, it is detected in the four cells of the QC, which are the direct descendants of the lens-shaped cell. Also expressed in patches of cells that appeared associated with the vascular primordium of the cotyledons. This expression is strongest in late heart stage embryos and then gradually decreases. Abnormal quiescent center (QC) in the root apical meristem (RAM) and defects in cell differentiation. Belongs to the WUS homeobox family.