1. Adaptation of a plant pathogen to partial host resistance: selection for greater aggressiveness in grapevine downy mildew.

    Evolutionary Applications 9(5):709 (2016) PMID 27247621 PMCID PMC4869412

    An understanding of the evolution of pathogen quantitative traits in response to host selective pressures is essential for the development of durable management strategies for resistant crops. However, we still lack experimental data on the effects of partial host resistance on multiple phenotyp...
  2. Epidemiological and evolutionary management of plant resistance: optimizing the deployment of cultivar mixtures in time and space in agricultural landscapes.

    Evolutionary Applications 8(10):919 (2015) PMID 26640518 PMCID PMC4662345

    The management of genes conferring resistance to plant-pathogens should make it possible to control epidemics (epidemiological perspective) and preserve resistance durability (evolutionary perspective). Resistant and susceptible cultivars must be strategically associated according to the princip...
  3. Role of the composition of lithium-rich layered oxide materials on the voltage decay

    Journal of Power Sources 280:687 (2015)

    Lithium-rich layered oxide is known to be one of the most promising positive electrode materials for high energy Li-ion batteries. Some publications report specific capacities higher than 250 mAh/g but the fade of the average potential during electrochemical cycling is an important dra...
  4. Interaction patterns between potato virus Y and eIF4E-mediated recessive resistance in the Solanaceae.

    Journal of Virology 88(17):9799 (2014) PMID 24942572 PMCID PMC4136351

    The structural pattern of infectivity matrices, which contains infection data resulting from inoculations of a set of hosts by a set of parasites, is a key parameter for our understanding of biological interactions and their evolution. This pattern determines the evolution of parasite pathogenic...
  5. Narrow bottlenecks affect Pea seedborne mosaic virus populations during vertical seed transmission but not during leaf colonization.

    PLoS Pathogens 10(1):e1003833 (2014) PMID 24415934 PMCID PMC3887104

    The effective size of populations (Ne) determines whether selection or genetic drift is the predominant force shaping their genetic structure and evolution. Populations having high Ne adapt faster, as selection acts more intensely, than populations having low Ne, where random effects of genetic ...
  6. Beneficial influence of succinic anhydride as electrolyte additive on the self-discharge of 5 V LiNi0.4Mn1.6O4cathodes

    Journal of Power Sources 236:39 (2013)

    The self-discharge mechanism of LiNi0.4Mn1.6O4, investigated by electrochemical methods, is mostly attributed to oxidative electrolyte decomposition due to the high lithium (de-)insertion potentials, since the material insertion capacity appears to be fully reversible upon subsequent g...
  7. High throughput quantitative phenotyping of plant resistance using chlorophyll fluorescence image analysis.

    Plant Methods 9(1):17 (2013) PMID 23758798 PMCID PMC3689632

    In order to select for quantitative plant resistance to pathogens, high throughput approaches that can precisely quantify disease severity are needed. Automation and use of calibrated image analysis should provide more accurate, objective and faster analyses than visual assessments. In contrast ...
  8. Durable strategies to deploy plant resistance in agricultural landscapes.

    New Phytologist 193(4):1064 (2012) PMID 22260272

    The deployment of resistant crops often leads to the emergence of resistance-breaking pathogens that suppress the yield benefit provided by the resistance. Here, we theoretically explored how farmers' main leverages (resistant cultivar choice, resistance deployment strategy, landscape planning a...
  9. Modelling the evolutionary dynamics of viruses within their hosts: a case study using high-throughput sequencing.

    PLoS Pathogens 8(4):e1002654 (2012) PMID 22532800 PMCID PMC3330117

    Uncovering how natural selection and genetic drift shape the evolutionary dynamics of virus populations within their hosts can pave the way to a better understanding of virus emergence. Mathematical models already play a leading role in these studies and are intended to predict future emergences...
  10. Asymmetrical over-infection as a process of plant virus emergence.

    Journal of Theoretical Biology 265(3):377 (2010) PMID 20435046

    Disentangling the role of epidemiological factors in plant pathogen emergences is a prerequisite to identify the most likely future invaders. An example of emergence was recently observed in France: in 10 years, "classic" (CL) strains of Watermelon mosaic virus (WMV) were displaced at a regional...
  11. Hierarchical Bayesian Modelling of plant colonisation by winged aphids: Inferring dispersal processes by linking aerial and field count data

    Ecological Modelling 221(15):1770 (2010)

    Understanding and modelling insect pest dispersal is an important prerequisite for designing integrated pest management programs. Nevertheless, studies investigating the dispersal of small insects in natural conditions remain scarce mainly because of the difficulty of tracking the movements...
  12. The conflicting relationships between aphids and men: a review of aphid damage and control strategies.

    Comptes Rendus Biologies 333(6-7):539 (2010) PMID 20541165

    In this review, after giving some figures on the economic impact of aphids on agricultural production, we describe the different mechanisms leading to yield losses (direct damage due to sieve drain and plant reaction, indirect damage, often the most important, due to virus transmission). Then, a...
  13. Constraints on evolution of virus avirulence factors predict the durability of corresponding plant resistances.

    Molecular Plant Pathology 10(5):599 (2009) PMID 19694951

    SUMMARY Understanding the factors driving pathogen emergence and re-emergence is a major challenge, particularly in agriculture, where the use of resistant plant cultivars imposes strong selective pressures on plant pathogen populations and leads frequently to 'resistance breakdown'. Presently, ...
  14. Key determinants of resistance durability to plant viruses: insights from a model linking within- and between-host dynamics.

    Virus Research 141(2):140 (2009) PMID 19159653

    The emergence of new genotypes of parasites involves several evolutionary, epidemiological and ecological processes whose individual effects and interactions are difficult to disentangle using experimental approaches. Here, a model is proposed to investigate how these processes lead to the emerg...
  15. Estimation of the number of virus particles transmitted by an insect vector.

    PNAS 104(45):17891 (2007) PMID 17971440 PMCID PMC2077060

    Plant viruses are submitted to narrow population bottlenecks both during infection of their hosts and during horizontal transmission between host individuals. The size of bottlenecks exerted on virus populations during plant invasion has been estimated in a few pathosystems but is not addressed ...
  16. Landscape epidemiology of plant diseases.

    Journal of Royal Society Interface 4(16):963 (2007) PMID 17650471 PMCID PMC2394555

    Many agricultural landscapes are characterized by a high degree of heterogeneity and fragmentation. Landscape ecology focuses on the influence of habitat heterogeneity in space and time on ecological processes. Landscape epidemiology aims at applying concepts and approaches originating from land...
  17. Biological properties and relative fitness of inter-subgroup cucumber mosaic virus RNA 3 recombinants produced in vitro.

    Journal of General Virology 88(Pt 10):2852 (2007) PMID 17872540

    In vitro reverse transcription of a mixture of total RNA from plants infected with the I17F or R strains of cucumber mosaic virus (CMV), representative of subgroups IA and II, respectively, results in viral cDNA populations including rare recombinant RNA 3 molecules, some of which also have poin...
  18. Tracing individual movements of aphids reveals preferential routes of population transfers in agroecosystems.

    Ecological Applications 16(3):839 (2006) PMID 16826984

    Agricultural pests are not restricted to crops, but often simultaneously or successively use different cultivated and uncultivated hosts. Nevertheless, the source-sink role of cultivated and uncultivated habitats in the life cycle of crop pests remains poorly understood. This is largely due to t...
  19. Effects of climate and land use on the occurrence of viruliferous aphids and the epidemiology of barley yellow dwarf disease

    Agriculture, Ecosystems & Environment 106(1):49 (2005)

    Barley yellow dwarf (BYD) disease is one of the most severe viral diseases in autumn sown cereals. In Western Europe, crop losses are mainly due to the PAV species of BYD viruses transmitted by Rhopalosiphum padi, the most abundant aphid in autumn. The proportion of migrant winged ap...
  20. Improvement of Barley yellow dwarf virus-PAV detection in single aphids using a fluorescent real time RT-PCR.

    Journal of Virological Methods 110(1):51 (2003) PMID 12757920

    One of the major factors determining the incidence of Barley yellow dwarf virus (BYDV) on autumn-sown cereals is the viruliferous state of immigrant winged aphids. This variable is assessed routinely using the enzyme-linked immunosorbant assay (ELISA). However, the threshold for virus detection ...