College of Horticulture and Landscape Architecture， Southwest University， Key Laboratory of Horticulture Science
for Southern Mountainous Regions， Ministry of Education， Key Laboratory of Olericulture of Chongqing City，
Chongqing 400715， China）
Abstract：Plants formed a set of complicated and delicate gene regulation network through
long-term development evolution，so as to ensure the plant bloss oming 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．
