Controls phase transition from the vegetative to the reproductive state. Involved in the maintenance of the shoot apical meristem (SAM) thus preventing inflorescence meristem (IM) formation and subsequent inflorescence stem development during flowering. Regulates leaf and organ morphology. Expressed in seedlings, roots, stems, rosettes and flowers (at protein level). Transcribed by RNA polymerase III (pol III). Belongs to the ubiquitin family.