Liste des publications scientifiques

The ubiquitous distribution of late embryogenesis abundant proteins across cell compartments in Arabidopsis offers tailored protection against abiotic stress

13/06/2014 21:04
Adrien Candata, Gaël Paszkiewicz, Martine Neveu, Romain Gautier, David C. Logan, Marie-Hélène Avelange-Macherel and David Machere   Résumé: Late embryogenesis abundant (LEA) proteins are hydrophilic, mostly intrinsically disordered proteins, which play major roles in desiccation tolerance. In Arabidopsis thaliana, 51 genes encoding LEA proteins clustered into nine families have been inventoried. To increase our understanding of the yet enigmatic functions of these gene families, we report...

Two CCAAT box-binding transcription factors redundantly regulate early steps of the legume-rhizobia endosymbiosis

13/06/2014 00:00
Tom Laloum, Maël Baudin, Lisa Frances, Agnes Lepage, Benjamin Billault-Penneteau, Marion R. Cerri, Federico Ariel, Marie-Françoise Jardinaud, Pascal Gamas, Fernanda de Carvalho-Niebel and Andreas Niebel   Résumé: During endosymbiotic interactions between legume plants and nitrogen-fixing rhizobia, successful root infection by bacteria and nodule organogenesis requires the perception and transduction of bacterial lipo-chitooligosaccharidic signal called Nod Factor (NF). NF perception in...

Cross-interference of plant development and plant–microbe interactions

10/06/2014 21:13
Edouard Evangelisti, Thomas Rey and Sebastian Schornack   Résumé: Plant roots are host to a multitude of filamentous microorganisms. Among these, arbuscular mycorrhizal fungi provide benefits to plants, while pathogens trigger diseases resulting in significant crop yield losses. It is therefore imperative to study processes which allow plants to discriminate detrimental and beneficial interactions in order to protect crops from diseases while retaining the ability for sustainable...

A COFRADIC Protocol To Study Protein Ubiquitination

12/05/2014 13:45
Elisabeth Stes, Mathias Laga, Alan Walton, Noortje Samyn, Evy Timmerman, Ive De Smet, Sofie Goormachtig and Kris Gevaert   Résumé: Here, we apply the COmbined FRActional DIagonal Chromatography (COFRADIC) technology to enrich for ubiquitinated peptides and to identify sites of ubiquitination by mass spectrometry. Our technology bypasses the need to overexpress tagged variants of ubiquitin and the use of sequence-biased antibodies recognizing ubiquitin remnants. In brief, all protein...

Resistance to phytopathogens e tutti quanti: placing plant quantitative disease resistance on the map

06/05/2014 00:00
Fabrice Roux, Derry Voisin, Thomas Badet, Claudine Balagué, Xavier Barlet, Carine Huard-Chauveau, Dominique Roby and Sylvain Raffaele   Résumé: Plant disease resistance can be seen as a process of a dual nature: both qualitative and quantitative. The nature of non-self molecules perceived by plants has led to the depiction of plant immunity as a two-layer defence system. The first layer is mediated by cell surface and intracellular pattern recognition receptors (PRRs) which perceive...

Distinct functional roles for the SLX4 ubiquitin-binding UBZ domains mutated in Fanconi anemia

02/05/2014 00:00
Lachaud C, Castor D, Hain K, Muñoz I, Wilson J, Macartney TJ, Schindler D, Rouse J.   Résumé: Defects in SLX4, a scaffold for DNA repair nucleases, cause Fanconi anemia due to defective repair of inter-strand DNA crosslinks (ICLs). Some FA patients have an SLX4 deletion removing two tandem UBZ4-type ubiquitin-binding domains, implicated in protein recruitment to sites of DNA damage. Here we show that human SLX4 is recruited to sites of ICL induction but the UBZ-deleted form of SLX4 in...

Nouvelles acquisitions sur le caractère poivré des vins rouges

01/05/2014 00:00
Olivier Geffroy, Thierry Dufourcq, Dorian Carcenac, Tracey Siebert, Markus Herderich and Eric Serrano   Résumé: La rotundone (Figure 1) est un composé aromatique très odorant responsable d’intenses notes poivrées dans les vins. Elle a été mise en évidence pour la première fois en 2008 dans les vins de Syrah par une équipe australienne (Wood et al. , 2008, Siebert et al. , 2008). Malgré son importance sensorielle, cette molécule est décrite par Ferreira (2012) comme l’un des 16 composés...

Transcriptional regulators of legume-rhizobia symbiosis: Nuclear Factors Ys and GRAS are two for tango

15/04/2014 00:00
Carolina Rípodas, Joaquín Clua, Marina Battaglia, Maël Baudin, Andreas Niebel, María Eugenia Zanetti and Flavio Blanco   Résumé: Transcription factors are DNA binding proteins that regulate gene expression. The nitrogen fixing symbiosis established between legume plants and soil bacteria is a complex interaction, in which plants need to integrate signals derived from the symbiont and the surrounding environment to initiate the developmental program of nodule organogenesis and the infection...

CYP77A19 and CYP77A20 characterized from Solanum tuberosum oxidize fatty acids in vitro and partially restore the wild phenotype in an Arabidopsis thaliana cutin mutant

09/04/2014 00:00
Grausem B, Widemann E, Verdier G, Nosbüsch D, Aubert Y, Beisson F, Schreiber L, Franke R, Pinot F.   Résumé: Cutin and suberin represent lipophilic polymers forming plant/environment interfaces in leaves and roots. Despite recent progress in Arabidopsis, there is still a lack on information concerning cutin and suberin synthesis, especially in crops. Based on sequence homology, we isolated two cDNA clones of new cytochrome P450s, CYP77A19 and CYP77A20 from potato tubers (Solanum...

Exploring Picea glauca aquaporins in the context of needle water uptake and xylem refilling

07/04/2014 00:00
Joan Laur and Uwe G. Hacke   Résumé: Conifer needles have been reported to absorb water under certain conditions. Radial water movement across needle tissues is likely influenced by aquaporin (AQP) water channels. Foliar water uptake and AQP localization in Picea glauca needles were studied using physiological and microscopic methods. AQP expression was measured using quantitative real-time PCR. Members of the AQP gene family in spruce were identified using homology search...
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