The transition from vegetative to reproductive growth is controlled by day length in many plant species. Day length is perceived in leaves and induces a systemic signal, called florigen, that moves through the phloem to the shoot apex. At the shoot apical meristem (SAM), florigen causes changes in gene expression that reprogram the SAM to form flowers instead of leaves. Analysis of flowering of Arabidopsis thaliana placed the CONSTANS/FLOWERING LOCUS T (CO/FT) module at the core of a pathway that promotes flowering in response to changes in day length. We describe progress in defining the molecular mechanisms that activate this module in response to changing day length and the increasing evidence that FT protein is a major component of florigen. Finally, we discuss conservation of FT function in other species and how variation in its regulation could generate different flowering behaviors.

Regulation and identity of florigen: FLOWERING LOCUS T moves center stage / F. Turck, F. Fornara, G. Coupland. - In: ANNUAL REVIEW OF PLANT BIOLOGY. - ISSN 1543-5008. - 59(2008), pp. 573-594.

Regulation and identity of florigen: FLOWERING LOCUS T moves center stage

F. Fornara
Secondo
;
2008

Abstract

The transition from vegetative to reproductive growth is controlled by day length in many plant species. Day length is perceived in leaves and induces a systemic signal, called florigen, that moves through the phloem to the shoot apex. At the shoot apical meristem (SAM), florigen causes changes in gene expression that reprogram the SAM to form flowers instead of leaves. Analysis of flowering of Arabidopsis thaliana placed the CONSTANS/FLOWERING LOCUS T (CO/FT) module at the core of a pathway that promotes flowering in response to changes in day length. We describe progress in defining the molecular mechanisms that activate this module in response to changing day length and the increasing evidence that FT protein is a major component of florigen. Finally, we discuss conservation of FT function in other species and how variation in its regulation could generate different flowering behaviors.
CONSTANS; Floral transition; Light-dependent protein stability; Photoperiod; Systemic signaling
Settore BIO/01 - Botanica Generale
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/169809
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