Involved in the regulation of flowering time (By similarity). Plays an important role during the early flowering of precocious trifoliate orange (PubMed:21533840). Moslty expressed in leaves and flowers, and, at lower levels, in flushes, roots and fruits. Present in rapidly proliferating tissues, such as shoot apical meristem, leaf primordium, and flower organ primordium. Accumulates during floral induction and inflorescence development. Low levels during summer, slow raise after September, and peak in November and remain high until March before a progressive decrease. High expression in the whole zone of the shoot apical meristem, leaf primordia, and in the marginal area of young leaves of juvenile material and adult buds in the vegetative stage. At the floral determination stage, present at a very low level throughout the shoot apical meristem tissues. At the inflorescence forming stage, accumulates in anthers.