A5011282888- Plant Pathogenic Bacteria Studies
- Legume Nitrogen Fixing Symbiosis
- Banana Cultivation and Research
- Plant-Microbe Interactions and Immunity
- Cassava research and cyanide
- Plant Pathogens and Fungal Diseases
- Plant Disease Resistance and Genetics
- Plant Pathogens and Resistance
- Infections and bacterial resistance
- Genetic and Environmental Crop Studies
- Agriculture, Plant Science, Crop Management
- Genomics and Phylogenetic Studies
- Cocoa and Sweet Potato Agronomy
- Agriculture and Rural Development Research
- Agronomic Practices and Intercropping Systems
- Plant Virus Research Studies
- Plant pathogens and resistance mechanisms
- Vibrio bacteria research studies
- Mycorrhizal Fungi and Plant Interactions
- Plant responses to water stress
- Ginger and Zingiberaceae research
- African Botany and Ecology Studies
- Microbial infections and disease research
- Fungal Plant Pathogen Control
- Selenium in Biological Systems
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2014-2024
Agropolis International
2018-2023
Institut de Recherche pour le Développement
2018-2023
Centre Occitanie-Montpellier
2022-2023
Plant Health Institute de Montpellier
2023
Université de Montpellier
2018-2023
L'Institut Agro
2023
Institut Agro Montpellier
2023
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2001-2023
Laboratoire des Interactions Plantes Micro-Organismes
2023
ABSTRACT We investigated a destructive pathogenic variant of the plant pathogen Ralstonia solanacearum that was consistently isolated in Martinique (French West Indies). Since 1960s, bacterial wilt solanaceous crops has been caused primarily by strains R. belong to either phylotype I or II. 1999, anthurium shade houses have dramatically affected uncharacterized II also wide range species, such as Heliconia caribea , cucurbitaceous crops, and weeds. From 1989 2003, total 224 isolates were...
Abstract Background The Ralstonia solanacearum species complex includes thousands of strains pathogenic to an unusually wide range plant species. These globally dispersed and heterogeneous cause bacterial wilt diseases, which have major socio-economic impacts. Pathogenicity is ancestral trait in R. with high genetic variation can be subdivided into four phylotypes, correlating isolates from Asia (phylotype I), the Americas IIA IIB), Africa III) Indonesia IV). Comparison genome sequences...
Bacterial wilt, caused by strains belonging to the Ralstonia solanacearum species complex, inflicts severe economic losses in many crops worldwide. Host resistance remains most effective control strategy against this disease. However, wilt is often overcome due considerable variation among pathogen strains. To help breeders circumvent problem, we assembled a worldwide collection of 30 accessions tomato, eggplant and pepper (Core-TEP), which are commonly used as sources R. or for mapping...
Bacterial wilt (BW) is a major disease of solanaceous crops caused by the Ralstonia solanacearum species complex (RSSC). Strains are grouped into five phylotypes (I, IIA, IIB, III, and IV). Varietal resistance most sustainable strategy for managing BW. Nevertheless, breeding to improve cultivar has been limited pathogen's extensive genetic diversity. Identifying bases specific non-specific prerequisite breed improvement. A gene (ERs1) was previously mapped in eggplant (Solanum melongena L.)...
In 2005, an extensive survey of bacterial wilt in Cameroon collected 110 strains Ralstonia solanacearum from wilting tomato, potato, pepper, huckleberry (Solanum scabrum), sesame, and amaranth. The genetic diversity phylogeny selected were assessed by multiplex-polymerase chain reaction (PCR), race 3/biovar 2-specific PCR, sequence analyses the mutS egl genes. These data compared with those 33 reference covering known within R. species complex. Strains isolated clustered into three four...
Phylogeographic studies inform about routes of pathogen dissemination and are instrumental for improving import/export controls. Genomes 17 isolates the bacterial wilt potato brown rot Ralstonia solanacearum race 3 biovar 2 (R3bv2), a Select Agent in United States, were thus analyzed to get insight into phylogeography this pathogen. Thirteen fourteen from Europe, Africa, Asia found belong single clonal lineage while South America genetically diverse tended carry ancestral alleles at genomic...
The genetic and phenotypic diversity of Côte d'Ivoire Ralstonia solanacearum strains was assessed on a 168-strain collection sampled Solanaceae both in the southern lowlands western highlands. Phylotypes I, II, III were prevalent, though at unexpected frequencies. Phylotype I (87.5%) genetically diverse overrepresented all agroecological areas, including highlands (AEZ III). II (10.7%) only belonged to one tropical lowland-adapted broad host range lineage (IIA-35), whereas no...
Summary To deploy durable plant resistance, we must understand its underlying molecular mechanisms. Type III effectors (T3Es) and their recognition play a central role in the interaction between bacterial pathogens crops. We demonstrate that Ralstonia solanacearum species complex (RSSC) T3E ripAX2 triggers specific resistance eggplant AG91‐25, which carries major locus EBWR9 . The accession AG91‐25 is resistant to wild‐type R. pseudosolanacearum strain GMI1000, whereas defective mutant of...
The emergence of a new genotype and pathogenic variant Ralstonia solanacearum in Martinique is described. Bacterial wilt solanaceous crops caused by phylotype‐I ‐II strains (‘historical strains’), was reported the 1960s. From 1999, Anthurium cucurbit production strongly affected described as genotyped phylotype IIB/sequevar4NPB (phIIB/4NPB). following questions concerning these were investigated: (i) they introduced or endemic, (ii) their distribution widespread Martinique, (iii) which...
To control bacterial wilt (Ralstonia solanacearum, phylotype IIB/4NPB), the antimicrobial effect of Allium fistulosum aqueous extract was assessed as a preplant soil treatment. Three concentrations (100, 50, and 25%, 1:1 [wt/vol]) were evaluated by in vitro inhibition assay vivo experiments growth chamber. In vitro, A. (100 50%) suppressed R. solanacearum. Preplant treatment with significantly reduced solanacearum populations. No pathogen detected after 100% concentrated from third day...
Although bacterial wilt remains a major plant disease throughout South America and the Caribbean, diversity of prevalent Ralstonia solanacearum populations is largely unknown. The genetic phenotypic R. strains in French Guiana was assessed using diagnostic polymerase chain reactions sequence-based (egl mutS) genotyping on 239-strain collection sampled families Solanaceae Cucurbitaceae, revealing an unexpectedly high diversity. Strains were distributed within phylotypes I (46.9%), IIA...
Fusarium oxysporum f. sp. cubense (Foc) is a soil-borne fungus that causes wilt, destructive plant disease has resulted in devastating economic losses to banana production worldwide. The complex evolutionary history and taxonomic repute consists of three pathogenic races at least 24 vegetative compatibility groups (VCGs). Surveys conducted Asia, Africa, the Sultanate Oman Mauritius encountered isolates F. were not compatible any known Foc VCGs. Genetic relatedness between undescribed VCGs...
Aphanomyces root rot ( euteiches ) has become a very destructive disease in French pea crops since 1993. The host specificity of the pea‐infecting populations this pathogen was investigated by inoculating pea, common vetch, alfalfa, broad bean and green with 91 A. isolates, originating from main areas infestation France. These isolates were compared to 13 various countries hosts (pea, bean, alfalfa). Virulence phenotypes defined according pathogenicity data on different hosts: all France...
The genetic diversity of Ralstonia solanacearum causing bacterial wilt tomato in Trinidad was assessed using the hierarchical phylotyping scheme and rep‐PCR DNA fingerprinting. Seventy‐one isolates were collected 2003 on infected crops four main vegetable cropping areas (North, Central, South‐East South). Two phylotypes present, with phylotype II being much more prevalent (66%) than I (34%). Phylotype strains consisted mainly sequevar 7 Central South‐East, 35 North, South. This is first...
For the development of pathogen-informed breeding strategies, identifying microbial genes involved in interactions with plant is a critical step. To identify type III effector (T3E) repertoires associated virulence bacterial wilt pathogen Ralstonia solanacearum on Solanaceous crops, we used an original association genetics approach combining DNA microarray data and pathogenicity resistant eggplant, pepper, tomato accessions. From this first screen, 25 T3Es were further full-length polymerase...
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...
Bacterial wilt caused by the Ralstonia solanacearum species complex (RSSC) is considered one of most harmful plant diseases in world. Special attention should be paid to R. pseudosolanacearum phylotype I due its large host range, worldwide distribution, and high evolutionary potential. So far, molecular epidemiology population genetics this bacterium are poorly understood. Until now, genetic structure RSSC has been analyzed on regional scales. Emerging questions regarding forces adaptation...