Transcription factor that prevents axillary bud outgrowth and delays early axillary bud development. Indirectly required for the auxin-induced control of apical dominance. Expressed in unelongated axillary buds, and, to a lower extent, in axillary structures such as flowers and siliques. Detected in axillary mersitems which appears in the axils of leaves after flowering. During bud vegetative development, down-regulated in the outer layers of the meristem, but accumulates transiently in young leaf primordia. In buds bearing flowers, restricted to the provascular tissue underlying the bud. Accumulates in axillary buds, but disappears at the time of bud outgrowth. Induced during environmentally induced bud dormancy (planting density). Repressed transiently after shoot apical meristem (SAM) decapitation (release from apical dominance).