Journal
JOURNAL OF EXPERIMENTAL BOTANY
Volume 61, Issue 9, Pages 2247-2254Publisher
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erq098
Keywords
Flower development; flowering; integrator; SOC1
Categories
Funding
- Korea Ministry of Science and Technology [2006-01952]
- Global Research Laboratory Program [2006-03870]
- BioGreen 21 program [20070301034011]
- Rural Development Administration
Ask authors/readers for more resources
SOC1, encoding a MADS box transcription factor, integrates multiple flowering signals derived from photoperiod, temperature, hormone, and age-related signals. SOC1 is regulated by two antagonistic flowering regulators, CONSTANS (CO) and FLOWERING LOCUS C (FLC), which act as floral activator and repressor, respectively. CO activates SOC1 mainly through FT but FLC represses SOC1 by direct binding to the promoter. SOC1 is also activated by an age-dependent mechanism in which SPL9 and microRNA156 are involved. When SOC1 is induced at the shoot apex, SOC1 together with AGL24 directly activates LEAFY (LFY), a floral meristem identity gene. APETALA1 (AP1), activated mainly by FT, is also necessary to establish and maintain flower meristem identity. When LFY and AP1 are established, flower development occurs at the anlagen of shoot apical meristem according to the ABC model. During early flower development, AP1 activates the A function and represses three redundantly functioning flowering time genes, SOC1, AGL24, and SVP to prevent floral reversion. During late flower development, such repression is also necessary to activate SEPALATA3 (SEP3) which is a coactivator of B and C function genes with LFY, otherwise SEP3 is suppressed by SOC1, AGL24, and SVP. Therefore, SOC1 is necessary to prevent premature differentiation of the floral meristem.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available