Abstract
Flowering of Arabidopsis is regulated by several environmental and endogenous signals. An important integrator of these inputs is the FLOWERING LOCUS T (FT) gene, which encodes a small, possibly mobile protein. A primary response to floral induction is the activation of FT RNA expression in leaves. Because flowers form at a distant site, the shoot apex, these data suggest that FT primarily controls the timing of flowering. Integration of temporal and spatial information is mediated in part by the bZIP transcription factor FD, which is already expressed at the shoot apex before floral induction. A complex of FT and FD proteins in turn can activate floral identity genes such as APETALA1 (AP1).
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Arabidopsis / genetics
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Arabidopsis / growth & development*
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Arabidopsis / metabolism*
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Arabidopsis Proteins / genetics
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Arabidopsis Proteins / metabolism*
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Chromatin Immunoprecipitation
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DNA-Binding Proteins / genetics
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DNA-Binding Proteins / metabolism
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Flowers / growth & development*
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Gene Expression Regulation, Plant
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Homeodomain Proteins / genetics
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Homeodomain Proteins / metabolism
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MADS Domain Proteins
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Models, Biological
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Mutation
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Oligonucleotide Array Sequence Analysis
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Phenotype
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Plant Leaves / metabolism
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Plant Proteins / genetics
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Plant Proteins / metabolism
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Plant Shoots / metabolism
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Protein Interaction Mapping
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Recombinant Fusion Proteins / metabolism
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Signal Transduction
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Time Factors
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Transcription Factors / genetics
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Transcription Factors / metabolism*
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Transcription, Genetic
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Two-Hybrid System Techniques
Substances
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AP1 protein, Arabidopsis
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Arabidopsis Proteins
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CONSTANS protein, Arabidopsis
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DNA-Binding Proteins
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FD protein, Arabidopsis
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FT protein, Arabidopsis
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Homeodomain Proteins
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MADS Domain Proteins
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Plant Proteins
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Recombinant Fusion Proteins
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Transcription Factors