Research Article

FD, a bZIP Protein Mediating Signals from the Floral Pathway Integrator FT at the Shoot Apex

Science  12 Aug 2005:
Vol. 309, Issue 5737, pp. 1052-1056
DOI: 10.1126/science.1115983

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Abstract

FLOWERING LOCUS T (FT) is a conserved promoter of flowering that acts downstream of various regulatory pathways, including one that mediates photoperiodic induction through CONSTANS (CO), and is expressed in the vasculature of cotyledons and leaves. A bZIP transcription factor, FD, preferentially expressed in the shoot apex is required for FT to promote flowering. FD and FT are interdependent partners through protein interaction and act at the shoot apex to promote floral transition and to initiate floral development through transcriptional activation of a floral meristem identity gene, APETALA1 (AP1). FT may represent a long-distance signal in flowering.

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