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Mise en évidence et caractérisation d'interconnexions moléculaires entre symbiose et résistance chez la légumineuse modèle Medicago truncatula

02/20/2013 00:00

Rey Thomas Abstract: La rhizosphère, définie comme l'espace du sol qui entoure les racines, héberge de nombreux microorganismes à l'origine d'une grande variété d'interactions avec la plante. Au cours des dix dernières années, un grand nombre de gènes végétaux impliqués dans le dialogue...

Regulation and functions of ERF ERN transcription factors during root nodule symbiosis between Medicago truncatula and Sinorhizobium meliloti

02/20/2013 00:00

Marion Cerri Abstract: Legumes are able to associate in symbiosis with Rhizobia bacteria in the soil, which culminates in the formation of a new organ referred to as the root nodule, within which differentiated bacteria fix nitrogen to the benefit of the host plant. The establishment of this...

Structural characterization and perception by the host plant Medicago truncatula of the cell wall chitosaccharides of the legume parasite Aphanomyces euteiches

02/19/2013 00:00

Amaury Nars Abstract: The oomycete Aphanomyces euteiches is a root pathogen infecting legumes which causes important yield losses. The cell wall of A.euteiches contains 10% N-acetylglucosamine (NAG) in the form of non-crystalline chitosaccharides, which are associated to cell wall glucans....

Arabidopsis ubiquitin ligase MIEL1 mediates degradation of the transcription factor MYB30 weakening plant defence

02/12/2013 00:00

Daniel Marino, Solène Froidure, Joanne Canonne, Sara Ben Khaled, Mehdi Khafif, Cécile Pouzet, Alain Jauneau, Dominique Roby & Susana Rivas Abstract: One of the most efficient plant resistance reactions to pathogen attack is the hypersensitive response, a form of programmed cell death at...

Extensive contemporary pollen-mediated gene flow in two herb species, Ranunculus bulbosus and Trifolium montanum, along an altitudinal gradient in a meadow landscape

02/12/2013 00:00

Matter P, Kettle CJ, Ghazoul J, Pluess AR Abstract: Background and Aims Genetic connectivity between plant populations allows for exchange and dispersal of adaptive genes, which can facilitate plant population persistence particularly in rapidly changing environments. Methods Patterns...

Short-chain chitin oligomers from arbuscular mycorrhizal fungi trigger nuclear Ca2+ spiking in Medicago truncatula roots and their production is enhanced by strigolactone

02/06/2013 00:00

Andrea Genre, Mireille Chabaud, Coline Balzergue, Virginie Puech-Pagès, Mara Novero, Thomas Rey, Joëlle Fournier, Soizic Rochange, Guillaume Bécard, Paola Bonfante and David G. Barker Abstract: The primary objective of this study was to identify the molecular signals present in...

Dynamics and biological relevance of DNA demethylation in Arabidopsis antibacterial defense

02/05/2013 00:00

Agnès Yu, Gersende Lepère, Florence Jay, Jingyu Wang, Laure Bapaume, Yu Wang, Anne-Laure Abraham, Jon Penterman, Robert L. Fischer, Olivier Voinnet and Lionel Navarro Abstract: DNA methylation is an epigenetic mark that silences transposable elements (TEs) and repeats. Whereas the...

An experimental system to study responses of Medicago truncatula roots to chitin oligomers of high degree of polymerization and other microbial elicitors

01/13/2013 00:00

A. Nars, T. Rey, C. Lafitte, S. Vergnes, S. Amatya, Christophe Jacquet, B. Dumas, C. Thibaudeau, L. Heux, A. Bottin, J. Fliegmann Abstract: The root system of legume plants interacts with a large variety of microorganisms, either pathogenic or symbiotic. Understanding how legumes recognize...

Coordination entre l'épiderme et le cortex dans l'établissement des endosymbioses racinaires chez Medicago truncatula : rôle du gène DMI3 codant une protéine calcium et calmoduline dépendante

01/11/2013 00:00

Pauline Rival Abstract: Depuis qu'elles ont conquis la surface de la terre, les plantes ont développé de nombreuses stratégies pour faire face aux carences en eau et en nutriments essentiels de leur environnement. L'une des plus fascinantes est sans doute la mise en place d'endosymbioses...

Glycosyltransferases from Oat (Avena) Implicated in the Acylation of Avenacins

12/20/2012 00:00

Amorn Owatworakit, Belinda Townsend, Thomas Louveau, Helen Jenner, Martin Rejzek, Richard K. Hughes, Gerhard Saalbach, Xiaoquan Qi, Saleha Bakht, Abhijeet Deb Roy, Sam T. Mugford, Rebecca J. M. Goss, Robert A. Field and Anne Osbourn Abstract: Plants produce a huge array of specialized...

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