Molecular Mechanism of Flowering Time Control by Flowering Integration SOC1

Plants formed a set of complicated and delicate gene regulation network through long-term development evolution,so as to ensure the plant blossoming in an optimal time.Flowering time is determined by a series of specific genes,which expressed and reacted with each other in a particular time and space.Molecular mechanism of flowering time is one of the hot spots in recent studies.This paper reviews the funcation of SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1(SOC1)gene and the role of its relationship with other related controlling signals:SOC1.One of the MADS transcription factor can integrate the blossom signals from 4 flowering regulation pathways(photoperiod pathway,autonomous pathway,vernalization pathway and gibberellin pathway)to stimulate blossoming,interact with other genes or proteins to regulate the downstream floral organ feature genes,and finally control flowering time.The expression of SOC1 was up-regulated by its up-stream genes(CO,FT and SPL)and GAs factors,yet down-regulated by flowering repressors SVP and FLC.And there is a positive feedback between SOC1 and AGL24.SOC1 and AGL24 can interact with each other to induce the expression of LFY,which can regulate the flower organ genes.