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Conservation of Arabidopsis Flowering Genes in Model Legumes


Hecht, VFG and Foucher, F and Ferrandiz, C and Macknight, R and Navarro, C and Morin, J and Vardy, ME and Ellis, N and Beltran, JP and Rameau, C and Weller, JL, Conservation of Arabidopsis Flowering Genes in Model Legumes, Plant Physiology, 137, (4) pp. 1420-1434. ISSN 0032-0889 (2005) [Refereed Article]

DOI: doi:10.1104/pp.104.057018


The model plants Arabidopsis (Arabidopsis thaliana) and rice (Oryza sativa) have provided a wealth of information about genes and genetic pathways controlling the flowering process, but little is known about the corresponding pathways in legumes. The garden pea (Pisum sativum) has been used for several decades as a model system for physiological genetics of flowering, but the lack of molecular information about pea flowering genes has prevented direct comparison with other systems. To address this problem, we have searched expressed sequence tag and genome sequence databases to identify flowering-gene-related sequences from Medicago truncatula, soybean (Glycine max), and Lotus japonicus, and isolated corresponding sequences from pea by degenerate-primer polymerase chain reaction and library screening. We found that the majority of Arabidopsis flowering genes are represented in pea and in legume sequence databases, although several gene families, including the MADS-box, CONSTANS, and FLOWERING LOCUS T/TERMINAL FLOWER1 families, appear to have undergone differential expansion, and several important Arabidopsis genes, including FRIGIDA and members of the FLOWERING LOCUS C clade, are conspicuously absent. In several cases, pea and Medicago orthologs are shown to map to conserved map positions, emphasizing the closely syntenic relationship between these two species. These results demonstrate the potential benefit of parallel model systems for an understanding of flowering phenology in crop and model legume species. © 2005 American Society of Plant Biologists.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Environmentally sustainable plant production
Objective Field:Environmentally sustainable plant production not elsewhere classified
UTAS Author:Hecht, VFG (Dr Valerie Hecht)
UTAS Author:Vardy, ME (Mrs Megan Vardy)
UTAS Author:Weller, JL (Associate Professor Jim Weller)
ID Code:32771
Year Published:2005
Web of Science® Times Cited:228
Deposited By:Plant Science
Deposited On:2005-08-01
Last Modified:2009-08-24

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