A5072849169- Plant Virus Research Studies
- Insect-Plant Interactions and Control
- Insect symbiosis and bacterial influences
- Plant Parasitism and Resistance
- Horticultural and Viticultural Research
- Animal Virus Infections Studies
- Bacteriophages and microbial interactions
- Transgenic Plants and Applications
- Plant and Fungal Interactions Research
- Phytoplasmas and Hemiptera pathogens
- Insect and Arachnid Ecology and Behavior
- Plant tissue culture and regeneration
- Cocoa and Sweet Potato Agronomy
- Insect Resistance and Genetics
- Insect and Pesticide Research
- Agricultural pest management studies
- CRISPR and Genetic Engineering
- Plant and animal studies
- Plant Disease Resistance and Genetics
- Viral Infections and Vectors
- Fermentation and Sensory Analysis
- Evolution and Genetic Dynamics
- Plant Pathogens and Fungal Diseases
- Forest Insect Ecology and Management
- Research on scale insects
Université de Montpellier
2019-2024
Centre Occitanie-Montpellier
2021-2024
Institut de Recherche pour le Développement
2022-2024
Institut Agro Montpellier
2001-2024
Plant Health Institute de Montpellier
2021-2024
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2015-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2024
L'Institut Agro
2022-2023
Biologie et Génétique des Interactions Plante-Parasite
2011-2020
Institut National de la Recherche Agronomique
2009-2015
A founding paradigm in virology is that the spatial unit of viral replication cycle an individual cell. Multipartite viruses have a segmented genome where each segment encapsidated separately. In this situation not recapitulated single virus particle but population. How multipartite manage to efficiently infect cells with all segments, thus whole information, long-standing perhaps deceptive mystery. By localizing and quantifying segments nanovirus host plant tissues we show they rarely...
Recombination, complementation and competition profoundly influence virus evolution epidemiology. Since viruses are intracellular parasites, the basic parameter determining potential for such interactions is multiplicity of cellular infection (cellular MOI), i.e. number viral genome units that effectively infect a cell. The MOI values prevail in host organisms have rarely been investigated, whether they remain constant or change widely during invasion totally unknown. Here, we fill this...
Drought is a major threat to crop production worldwide and accentuated by global warming. Plant responses this abiotic stress involve physiological changes overlapping, at least partially, the defense pathways elicited both viruses their herbivore vectors. Recently, number of theoretical empirical studies anticipated influence climate on vector-borne plants animals, mainly addressing effects virus itself or vector population dynamics, inferring possible consequences transmission. Here, we...
ABSTRACT Plant virus species of the family Nanoviridae have segmented genomes with highest known number segments encapsidated individually. They thus likely represent most extreme case so-called multipartite, or multicomponent, viruses. All are believed to be transmitted in a circulative nonpropagative manner by aphid vectors, meaning that simply crosses cellular barriers within body, from gut salivary glands, without replicating even expressing any its genes. However, this assumption is...
The multiplicity of cellular infection (MOI) is the number virus genomes a given species that infect individual cells. This parameter chiefly impacts severity within-host population bottlenecks as well intensity genetic exchange, competition, and complementation among viral genotypes. Only few formal estimations MOI currently are available, most theoretical reports have considered this constant within infected host. Nevertheless, colonization multicellular host complex process during which...
Plants suffer from a broad range of abiotic and biotic stresses that do not occur in isolation but often simultaneously. Productivity natural agricultural systems is frequently constrained by water limitation, the frequency duration drought periods will likely increase due to global climate change. In addition, phytoviruses represent highly prevalent threat wild cultivated plant species. Several hints support modification epidemiological parameters viruses response environmental changes...
Nanoviruses are plant multipartite viruses with a genome composed of six to eight circular single-stranded DNA segments. The distinct segments encapsidated individually in icosahedral particles that measure ≈18 nm diameter. Recent studies on the model species Faba bean necrotic stunt virus (FBNSV) revealed complete sets genomic rarely occur infected cells and function encoded by given viral segment can complement others across neighbouring cells, presumably translocation gene products...
Understanding at which spatiotemporal scale a disease causes significant secondary spread has both theoretical and practical implications. We investigated this issue in the case of European stone fruit yellows (ESFY), quarantine vector-borne phytoplasma Prunus trees. Our work was focused on processes underlying spread: interplay between life cycles pathogen ('Candidatus Phytoplasma prunorum') vector (Cacopsylla pruni). demonstrated experimentally that C. pruni only one generation per year we...
For any organism, population size, and fluctuations thereof, are of primary importance in determining the forces driving its evolution. This is particularly true for viruses—rapidly evolving entities that form populations with transient explosive expansions alternating phases migration, resulting strong bottlenecks associated founder effects increase genetic drift. A typical illustration this pattern progression viral disease within a eukaryotic host, where such demographic key factor...
Because multipartite viruses package their genome segments in different viral particles, they face a potentially huge cost if the entire genomic information, i.e., all segments, needs to be present concomitantly for infection function. Previous work with octapartite faba bean necrotic stunt virus (FBNSV; family Nanoviridae , genus Nanovirus ) showed that this issue can resolved at within-host level through supracellular functioning; do not need within same host cell but may complement each...
Cauliflower mosaic virus (CaMV; family Caulimoviridae) responds to the presence of aphid vectors on infected plants by forming specific transmission morphs. This phenomenon, coined activation (TA), controls plant-to-plant propagation CaMV. A fundamental question is whether other viruses rely TA. Here, we demonstrate that unrelated turnip (TuMV; Potyviridae) activated reactive oxygen species H2O2 and inhibited calcium channel blocker LaCl3 H2O2-triggered TA manifested itself induction...
Vector transmission plays a primary role in the life cycle of viruses, and insects are most common vectors. An important mode vector transmission, reported only for plant is circulative nonpropagative whereby virus cycles within body its insect vector, from gut to salivary glands saliva, without replicating. This has been extensively studied viral families Luteoviridae Geminiviridae also Nanoviridae The biology viruses these three different, whether have evolved similar molecular/cellular...
Bunyaviruses are enveloped negative or ambisense single-stranded RNA viruses with a genome divided into several segments. The canonical view depicts each viral particle packaging one copy of genomic segment in polarity named the strand. Several opposing observations revealed nonequal ratios segments, uneven number segments per virion, and even complementary strands. Unfortunately, these result from studies often addressing other questions, on distinct species, not using accurate quantitative...
In this study, we used a predator-enabled metagenomics strategy to sample the virome of remote and difficult-to-access densely forested African tropical region. Specifically, focused our study on use army ants genus Dorylus that are obligate collective foragers group predators attack overwhelm broad array animal prey. Using 209 ant samples collected from 29 colonies virion-associated nucleic acid-based approach, showed diversity bacterial, plant, invertebrate vertebrate viral sequences were...
A greenhouse-based system to evaluate Daktulosphaira vitifoliae (Fitch) performance on various host plants was modified. Two parthenogenetic generations could be continuously observed and the numbers of reproductive adults feeding sites (nodosities) determined. Phylloxera separated into three types. The standard type produced increased reproducing within first two generations. second performed significantly better in colonizing generation (G1) than type, but had declining reproduction (G2)....
Abstract Changes in plant abiotic environments may alter virus epidemiological traits, but how such changes actually affect their quantitative relationships is poorly understood. Here, we investigated the effects of water deficit on Cauliflower mosaic (CaMV) traits (virulence, accumulation, and vectored-transmission rate) 24 natural Arabidopsis thaliana accessions grown under strictly controlled environmental conditions. CaMV virulence increased significantly response to during vegetative...
Abstract A sample of seventy‐two Aphis gossypii Glover (Homoptera: Aphididae) clones was collected in southeastern France. The efficiency these to transmit a potyvirus (papaya ringspot virus T‐strain) assessed controlled conditions. In first screening, the transmitted by all and 3.5‐fold difference between most least efficient obtained. During subsequent trials, which were carried out confirm differences transmission clones, only one clone proved be more than others. This appeared consistent...
ISHS XX International Symposium on Virus and Virus-Like Diseases of Temperate Fruit Crops - Tree EUROPEAN STONE FRUIT YELLOWS: CONSEQUENCES OF THE LIFE CYCLE VECTOR AND MULTIPLICATION PHYTOPLASMA IN INSECT ON EPIDEMIOLOGY DISEASE