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VEGETATIVE1 is essential for development of the compound inflorescence in pea


Berbel, A and Ferrandiz, C and Hecht, V and Dalmais, M and Lund, OS and Sussmilch, FC and Taylor, SA and Bendahmane, A and Ellis, THN and Beltran, JP and Weller, JL and Madueno, F, VEGETATIVE1 is essential for development of the compound inflorescence in pea, Nature Communications, 3 Article 797. ISSN 2041-1723 (2012) [Refereed Article]

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Copyright Statement

Copyright 2012 Macmillan Publishers Limited

DOI: doi:10.1038/ncomms1801


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.

Item Details

Item Type:Refereed Article
Keywords:legume inflorescence development
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Hecht, V (Dr Valerie Hecht)
UTAS Author:Sussmilch, FC (Dr Frances Sussmilch)
UTAS Author:Taylor, SA (Mr Scott Taylor)
UTAS Author:Weller, JL (Associate Professor Jim Weller)
ID Code:81301
Year Published:2012
Funding Support:Australian Research Council (DP0878723)
Web of Science® Times Cited:51
Deposited By:Plant Science
Deposited On:2012-11-28
Last Modified:2013-05-14

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