期刊
PLANT CELL
卷 26, 期 3, 页码 1009-1017出版社
AMER SOC PLANT BIOLOGISTS
DOI: 10.1105/tpc.113.120352
关键词
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资金
- National Science Foundation [IOS-1149822]
- Research Council of the University of Oklahoma, Norman Campus
- Nepente Grant from Regione Lombardia
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [1149822] Funding Source: National Science Foundation
For many plant species, reproductive success relies on the proper timing of flowering, and photoperiod provides a key environmental input. Photoperiod-dependent flowering depends on timely expression of FLOWERING LOCUS T (FT); however, the coordination of various cis-regulatory elements in the FT promoter is not well understood. Here, we provide evidence that long-distance chromatin loops bring distal enhancer elements into close association with the proximal promoter elements bound by CONSTANS (CO). Additionally, we show that NUCLEAR FACTOR Y (NF-Y) binds a CCAAT box in the distal enhancer element and that CCAAT disruption dramatically reduces FT promoter activity. Thus, we propose the recruitment model of photoperiod-dependent flowering where NF-Y complexes, bound at the FT distal enhancer element, help recruit CO to proximal cis-regulatory elements and initiate the transition to reproductive growth.
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