A5089713267- Plant Virus Research Studies
- Insect-Plant Interactions and Control
- Plant Pathogenic Bacteria Studies
- Plant Disease Resistance and Genetics
- Plant and Fungal Interactions Research
- Insect symbiosis and bacterial influences
- Insect Resistance and Genetics
- Nematode management and characterization studies
- Vector-Borne Animal Diseases
- Transgenic Plants and Applications
- Agronomic Practices and Intercropping Systems
- Phytoplasmas and Hemiptera pathogens
- Chromosomal and Genetic Variations
- Plant Parasitism and Resistance
- Genetic Mapping and Diversity in Plants and Animals
- CRISPR and Genetic Engineering
- Insect and Pesticide Research
- Mosquito-borne diseases and control
- Agricultural pest management studies
- Plant-Microbe Interactions and Immunity
- Animal Disease Management and Epidemiology
- Evolution and Genetic Dynamics
- Agricultural Practices and Plant Genetics
- Viral Infections and Vectors
- Hemiptera Insect Studies
Université de Montpellier
2018-2024
Institut de Recherche pour le Développement
2022-2024
Institut Agro Montpellier
2015-2024
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2011-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2024
Centre Occitanie-Montpellier
2020-2024
Plant Health Institute de Montpellier
2020-2024
L'Institut Agro
2024
Biologie et Génétique des Interactions Plante-Parasite
2009-2020
During a large scale "non priori" survey in 2010 of South African plant-infecting single stranded DNA viruses, highly divergent geminivirus genome was isolated from wild spurge, Euphorbia caput-medusae. In addition to being infectious E. caput-medusae, the cloned viral also tomato and Nicotiana benthamiana. The virus, named caput-medusae latent virus (EcmLV) due absence infection symptoms displayed by its natural host, caused severe both N. organisation EcmLV is unique amongst geminiviruses...
Following the first detection of tomato yellow leaf curl virus (TYLCV) from Reunion (700 km east Madagascar) in 1997 and upsurge Bemisia tabaci (Gennadius) on vegetable crops, two genetic types B. were distinguished using RAPD-PCR cytochrome oxidase I (COI) gene sequence comparisons. One type was assigned to biotype B other genetically dissimilar populations described elsewhere named Ms, after Mascarenes Archipelago. This new forms a distinct group that is sister groups, one which member Q...
Three maize streak virus (MSV) isolates were derived from an MSV population used to assess the response infection of cultivars. Isolate SP1 was obtained this through short acquisition and inoculation periods (1 5 min, respectively), using a single Cicadulina mbila vector. SP2 after transmission wild perennial host (Coix lacryma-jobi), on which it maintained for about 4 years without insect transmission. N2A, most pathogenic isolate, initial serial passages almost completely resistant inbred...
Recombination events are frequently inferred from the increasing number of sequenced viral genomes, but their impact on natural populations has rarely been evidenced. TYLCV-IS76 is a recombinant (Begomovirus,Geminiviridae) between Israel strain tomato yellow leaf curl virus (TYLCV-IL) and Spanish Sardinia (TYLCSV-ES) that was generated most probably in late 1990s southern Morocco (Souss). Its emergence 2000s coincided with use resistant cultivars bearing Ty-1 gene, led eventually to entire...
Human-mediated bioinvasions provide the opportunity to study early stages of contact between formerly allopatric, divergent populations a species. However, when invasive and resident are morphologically similar, it may be very difficult assess their distribution in field, as well extent ecological overlap genetic exchanges populations. We here illustrate use data obtained from set eight microsatellite markers together with Bayesian clustering methods document invasions group major tropical...
Abstract Five distinct electrical penetration graph waveforms characterising the feeding behaviour of leafhopper Cicadulina mbila Naudé (Homoptera: Cicadellidae) on maize ( Zea mays L.) were obtained using a DC based system. The distinguished by spectral features and statistical analysis their median voltages, durations time to first waveform recording. By changing polarity system voltage level input resistor it was shown that are mainly determined electromotive force (emf) component. Based...
Tomato yellow leaf curl virus (TYLCV) is a highly damaging begomovirus native to the Middle East. TYLCV has recently spread worldwide, recombining with other begomoviruses. Recent analysis of mixed infections between and Comoros (ToLCKMV) shown that, although natural selection preserves certain co-evolved intra-genomic interactions, numerous diverse recombinants are produced at 120 days post-inoculation (dpi), recombinant populations from different tomato plants very divergent. Here, we...
ABSTRACT Spatial and temporal distribution of Maize streak virus (MSV, family Geminiviridae, genus Mastrevirus) was monitored in the vector species Cicadulina mbila nonvector C. chinaï using conventional real-time quantitative polymerase chain reaction. Sustained feeding on MSV-infected plants showed that accumulation reaches a maximum chinaï, but not mbila. After 3-day acquisition access period (AAP), MSV detected gut, hemolymph, head mbila, only gut chinaï. Similarly, Digitaria (genus...
In September 1997, stunting, reduced leaf size, curling, and yellow margins were observed on tomato plants a farm the south coast of Réunion, French island belonging to Mascarenes archipelago. To our knowledge, these symptoms appeared be characteristic curl virus (TYLCV) infection. Diseased gave positive reactions with triple antibody sandwich-enzyme-linked immunosorbent assay (TAS-ELISA), using ADGEN antibodies specific for begomoviruses (1). The serological results confirmed by polymerase...
Viruses of the genus Begomovirus (Geminiviridae) are emerging economically important plant viruses with a circular, single-stranded DNA genome. Previous studies have shown that geminiviruses and RNA exhibit similar mutation frequencies, although replicated by host polymerases their own virus-encoded error-prone RNA-dependent RNA-polymerase. However, phenotypic effects naturally occurring mutations never been extensively investigated in geminiviruses, particularly because, to be infectious,...
Abstract Tomato yellow leaf curl virus (TYLCV) and tomato Sardinia (TYLCSV) (genus Begomovirus , family Geminiviridae ) as well their whitefly vector Bemisia tabaci were reported from the south‐west central regions of Morocco. To establish a more comprehensive view begomoviruses B. biotypes throughout Morocco, 32 fields surveyed for disease (TYLCD) symptoms in southern northern regions, 54 samples leaves cultivated plants or weeds 35 individuals collected analysed by PCR, randomly amplified...
Recombination has an evident impact on virus evolution and emergence of new pathotypes, generated immense literature. However, the distribution phenotypic effects caused by genome-wide random homologous recombination never been formally investigated. Previous data subject have promoted implicit view that most viral recombinant genomes are likely to be deleterious or lethal if nucleotide identity parental sequences is below 90%. We decided challenge this creating a bank near-random...
Bemisia tabaci populations belonging to Middle East-Asia Minor one (MEAM1) and Mediterranean (MED) groups (formerly biotype B Q, respectively) have spread throughout the world. Although introduction of MEAM1 is documented from several Caribbean islands, it generally not known whether MED has also been introduced; indigenous survived; if in affirmative, which group(s) they belonged. Whiteflies were collected seven islands on various plant species. The prevalence non-MEAM1 individuals was...
Abstract B emisia tabaci is a complex of putative species that exhibit strong geographical pattern. Crossing experiments have revealed various degrees reproductive isolation between these nascent species, ranging fertile first‐generation hybrids ( F 1) and no 1 at all. However, the relevance results under natural conditions generally not known. The worldwide invasion M iddle E ast‐ A sia inor MEAM has caused secondary contacts allopatric which in turn provide an opportunity to detect...
HomePlant DiseaseVol. 103, No. 6First Report of TYLCV-IS141, a Tomato Yellow Leaf Curl Virus Recombinant Infecting Plants Carrying the Ty-1 Resistance Gene in Sardinia (Italy) PreviousNext DISEASE NOTES OPENOpen Access licenseFirst (Italy)M. Granier, L. Tomassoli, A. Manglli, M. Nannini, Peterschmitt, and C. UrbinoM. GranierCIRAD, UMR BGPI, F-34398 Montpellier, France; , TomassoliConsiglio per la ricerca agricoltura e l'analisi dell'economia agraria, Centro di ricerca, Difesa Certificazione...