A5063445312- Plant pathogens and resistance mechanisms
- Plant-Microbe Interactions and Immunity
- Plant Pathogens and Fungal Diseases
- Plant and Fungal Interactions Research
- Plant Disease Resistance and Genetics
- Plant Pathogenic Bacteria Studies
- Plant nutrient uptake and metabolism
- Plant Virus Research Studies
- Plant Water Relations and Carbon Dynamics
- Sunflower and Safflower Cultivation
- Photosynthetic Processes and Mechanisms
- Plant Pathogens and Resistance
- Plant responses to elevated CO2
- Agriculture, Soil, Plant Science
- Microbial Natural Products and Biosynthesis
- Plant and Fungal Species Descriptions
- Plant Reproductive Biology
- Ion Transport and Channel Regulation
- Genomics, phytochemicals, and oxidative stress
- Yeasts and Rust Fungi Studies
- Plant responses to water stress
- Genetic Mapping and Diversity in Plants and Animals
- Insect symbiosis and bacterial influences
- Powdery Mildew Fungal Diseases
- Mycorrhizal Fungi and Plant Interactions
Laboratoire des Interactions Plantes Micro-Organismes
2007-2021
Université de Toulouse
2014-2020
Centre National de la Recherche Scientifique
2007-2020
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020
Université Toulouse III - Paul Sabatier
2013-2014
Centre d'Études Spatiales de la Biosphère
2014
Laboratoire Evolution et Diversite Biologique
2013
Interactions Arbres-Microorganismes
2010
Sclerotinia sclerotiorum is a phytopathogenic fungus with over 400 hosts including numerous economically important cultivated species. This contrasts many destructive pathogens that only exhibit single or very few hosts. Many plant "two-speed" genome. So described because their genomes contain alternating gene rich, repeat sparse and poor, repeat-rich regions. In fungi, the regions may be subjected to process termed repeat-induced point mutation (RIP). Both activity RIP are thought play...
Summary Fungal plant pathogens secrete effector proteins and metabolites to cause disease. Additionally, some species transfer small RNAs (sRNAs) into cells silence host mRNAs through complementary base pairing suppress immunity. The fungus Sclerotinia sclerotiorum infects over 600 species, but little is known about the molecular processes that govern interactions with its many hosts. In particular, evidence for production of sRNAs by S. during infection lacking. We sequenced produced in...
To understand why the Pvr4 resistance of pepper against Potyvirus spp. remained durable in field conditions while virulent Potato virus Y (PVY) variants could be selected laboratory, we studied molecular mechanisms which generated these and consequences on viral fitness. Using a reverse genetics approach with an infectious cDNA clone PVY, found that region coding for NIb protein (RNA-dependent RNA polymerase) PVY was avirulence factor corresponding to single nonsynonymous nucleotide...
High water use efficiency (WUE) can be achieved by coordination of biomass accumulation and consumption. WUE is physiologically genetically linked to carbon isotope discrimination (CID) in leaves plants. A population 148 recombinant inbred lines (RILs) sunflower derived from a cross between XRQ PSC8 was studied identify quantitative trait loci (QTL) controlling CID, compare QTL associated with these traits different drought scenarios. We conducted greenhouse experiments 2011 2012 using 100...
The range of hosts that a parasite can infect in nature is trait determined by its own evolutionary history and potential hosts. However, knowledge on host diversity evolution at the family level often lacking. Here, we investigate variation diversification trends within Sclerotiniaceae, Ascomycete fungi. Using phylogenetic framework, associate rates, frequency jump events during this family. Variations rate Sclerotiniaceae define three major macro-evolutionary regimes with contrasted...
SUMMARY The broad host range necrotrophic fungus Sclerotinia sclerotiorum is a devastating pathogen of many oil and vegetable crops. Plant genes conferring complete resistance against S. have not been reported. Instead, plant populations challenged by exhibit continuum partial designated as quantitative disease (QDR). Because their complex interplay small phenotypic effect, the functional characterization QDR remains limited. How fungi manipulate programmed cell death for instance largely...
The range of hosts that parasites can infect is a key determinant the emergence and spread disease. Yet, impact host variation on evolution parasite genomes remains unknown. Here, we show codon optimization underlies genome adaptation in broad parasites. We found longer proteins encoded by fungi likely increase natural selection these species. Accordingly, correlates with across fungal kingdom. At species level, biased patterns synonymous substitutions underpin increased generalist but not...
Abstract Leaf carbon isotope discrimination ( CID ) has been suggested as an indirect tool for breeding water‐use efficiency WUE in various crops. This work focused on assessing phenotypic correlations between and leaf analysing genotypic variability four sunflower genotypes grown a greenhouse pots with five different stable levels of soil water content SWC ). We measured at whole plant (intrinsic) level. At level, was derived from the ratio total dry aerial biomass BM to cumulative...
Abstract Background This article evaluates the potential of intraspecific variation for whole-root hydraulic properties in sunflower. We investigated genotypic differences related to root water transport four genotypes selected because their differing use efficiency (JAC doi: 10.1111/jac.12079. 2014). used a pressure-flux approach characterize conductance ( L 0 ) which reflects overall uptake capacity roots and conductivity Lp r represents intrinsic permeability on an area basis. The...
ABSTRACT Plant pathogenic fungi secrete effector proteins and secondary metabolites to cause disease. Additionally, some produce small RNAs (sRNAs) that silence transcripts of host immunity genes through RNA interference. The fungus Sclerotinia sclerotiorum infects over 600 plant species, but little is known about its molecular interactions with hosts. In particular, the role sRNAs in S. pathogenicity has not been determined. By sequencing vitro during infection two we found produces at...
Abstract The range of hosts that a parasite can infect in nature is trait determined by its own evolutionary history and potential hosts. However, knowledge on host diversity evolution at the family level often lacking. Here, we investigate variation diversification trends within Sclerotiniaceae , Ascomycete fungi. Using phylogenetic framework, associate rates, frequency jump events, during this family. Variations rate define three major macro-evolutionary regimes with contrasted proportions...
ABSTRACT The broad host range necrotrophic fungus Sclerotinia sclerotiorum is a devastating pathogen of many oil and vegetable crops. Plant genes conferring complete resistance against S. have not been reported. Instead, plant populations challenged by exhibit continuum partial designated as quantitative disease (QDR). Because their complex interplay small phenotypic effect, the functional characterization QDR remains limited. How fungi manipulate programmed cell death for instance largely...
Abstract The host range of parasites is an important factor in assessing the dynamics disease epidemics. evolution pathogens to accommodate new hosts may lead expansion, a process molecular bases which are largely enigmatic. fungus Sclerotinia sclerotiorum parasitizes more than 400 plant species from diverse eudicot families while its close relative, S. trifoliorum , restricted plants Fabaceae family. We analyzed global transcriptome reprogramming on six botanical and reveal flexible,...