VEGETATIVE1 is essential for development of the compound inflorescence in pea

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  • Ana Berbel, Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas–Universidad Politécnica de Valencia, Spanien
  • Cristina Ferrándiz, Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas–Universidad Politécnica de Valencia, Spanien
  • Valérie Hecht, School of Plant Science, University of Tasmania, Hobart, Australien
  • Marion Dalmais, Unité de Recherche en Génomique Végétale, UMR INRA-CNRS, Frankrig
  • Ole Søgaard Lund, Danmark
  • Frances C Sussmilch, School of Plant Science, University of Tasmania, Hobart, Australien
  • Scott A Taylor, School of Plant Science, University of Tasmania, Hobart, Australien
  • Abdelhafid Bendahmane, Unité de Recherche en Génomique Végétale, UMR INRA-CNRS, Frankrig
  • T H Noel Ellis, John Innes Centre, Storbritannien
  • José P Beltrán, Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas–Universidad Politécnica de Valencia, Spanien
  • James L Weller, School of Plant Science, University of Tasmania, Hobart, Australien
  • Francisco Madueño, Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas–Universidad Politécnica de Valencia, Spanien
  • Institut for Genetik og Bioteknologi
Unravelling the basis of variation in inflorescence architecture is important to understanding how the huge diversity in plant form has been generated. Inflorescences are divided between simple, as in Arabidopsis, with flowers directly formed at the main primary inflorescence axis, and compound, as in legumes, where they are formed at secondary or even higher order axes. The formation of secondary inflorescences predicts a novel genetic function in the development of the compound inflorescences. Here we show that in pea this function is controlled by VEGETATIVE1 (VEG1), whose mutation replaces secondary inflorescences by vegetative branches. We identify VEG1 as an AGL79-like MADS-box gene that specifies secondary inflorescence meristem identity. VEG1 misexpression in meristem identity mutants causes ectopic secondary inflorescence formation, suggesting a model for compound inflorescence development based on antagonistic interactions between VEG1 and genes conferring primary inflorescence and floral identity. Our study defines a novel mechanism to generate inflorescence complexity.
OriginalsprogEngelsk
TidsskriftNature Communications
Vol/bind3
Nummer797
Sider (fra-til)1-8
Antal sider8
ISSN2041-1723
DOI
StatusUdgivet - 24 apr. 2012

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