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Science 297 (5579): 243-246

Copyright © 2002 by the American Association for the Advancement of Science

Multiple Roles of Arabidopsis VRN1 in Vernalization and Flowering Time Control

Yaron Y. Levy,* Stéphane Mesnage,*dagger Joshua S. Mylne, Anthony R. Gendall,ddagger Caroline Dean§

Arabidopsis VRN genes mediate vernalization, the process by which a long period of cold induces a mitotically stable state that leads to accelerated flowering during later development. VRN1 encodes a protein that binds DNA in vitro in a non-sequence-specific manner and functions in stable repression of the major target of the vernalization pathway, the floral repressor FLC. Overexpression of VRN1 reveals a vernalization-independent function for VRN1, mediated predominantly through the floral pathway integrator FT, and demonstrates that VRN1 requires vernalization-specific factors to target FLC.

Department of Cell and Developmental Biology, John Innes Centre, Colney Lane, Norwich NR4 7UH, UK
*   These authors contributed equally to this work.

dagger    Present address: Laboratoire de Recherche Moléculaire sur les Antibiotiques, 15 rue de l'Ecole de Médecine, 75006 Paris, France.

ddagger    Present address: Department of Botany, La Trobe University, Bundoora, Victoria, 3083, Australia.

§   To whom correspondence should be addressed. E-mail: caroline.dean{at}bbsrc.ac.uk


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