A5070445954- Plant Pathogenic Bacteria Studies
- Plant Pathogens and Fungal Diseases
- Plant-Microbe Interactions and Immunity
- Plant Disease Resistance and Genetics
- Legume Nitrogen Fixing Symbiosis
- Banana Cultivation and Research
- Cassava research and cyanide
- Biosensors and Analytical Detection
- Entomopathogenic Microorganisms in Pest Control
- Infections and bacterial resistance
- Plant Virus Research Studies
- Insect symbiosis and bacterial influences
- Advanced biosensing and bioanalysis techniques
- SARS-CoV-2 detection and testing
- Phytoplasmas and Hemiptera pathogens
- Insect Resistance and Genetics
- Mosquito-borne diseases and control
- Bacteriophages and microbial interactions
- Plant and Fungal Species Descriptions
- Genomics and Phylogenetic Studies
- Plant biochemistry and biosynthesis
- Plant pathogens and resistance mechanisms
- Healthcare Regulation
- Plant and soil sciences
- Insect behavior and control techniques
Peuplements végétaux et bioagresseurs en milieu tropical
2014-2025
Stellenbosch University
2023-2025
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2016-2025
Agropolis International
2020-2021
Institute of Plant Protection
2019
University of Reunion Island
2015
Given the risk of zoonotic disease emergence, including new SARS-CoV-2 variants COVID-19, rapid diagnostic tools are urgently needed to improve control spread infectious diseases. A one-pot triplex real-time RT-LAMP (reverse-transcription-loop-mediated isothermal amplification) assay, based on two regions genome SARS-CoV-2-specifically Orf1ab and N genes-along with one internal control, human RNase P gene, was developed. The multiplexing relies distinct melting peaks produced during an...
Copper-based antimicrobial compounds are widely used to control plant bacterial pathogens. Pathogens have adapted in response this selective pressure. Xanthomonas citri pv. citri, a major citrus pathogen causing Asiatic canker, was first reported carry plasmid-encoded copper resistance Argentina. This phenotype conferred by the copLAB gene system. The emergence of resistant strains has since been Réunion and Martinique. Using microsatellite-based genotyping PCR, we demonstrated that genetic...
The Ralstonia solanacearum species complex (RSSC) is a highly diverse cluster of bacterial strains found worldwide, many which are destructive and cause wilt (BW) in wide range host plants. In 2009, potato production Madagascar was dramatically affected by several BW epidemics. Controlling this disease critical for Malagasy producers. first important step towards control the characterization their putative origins. genetic diversity population structure RSSC were investigated major areas...
Knowledge of the host range a biocontrol agent (BCA) is fundamental. Host determines BCA's economic potential, as well possible risk for non-target organisms. Entomopathogenic fungal strains belonging to genus Beauveria are widely used BCA, but our knowledge their physiological only partial. The aim this study was improve understanding three two species, B. hoplocheli and bassiana. We performed laboratory mortality bioassays assess pathogenicity virulence against nine insect pests, orders:...
Background. Ralstonia solanacearum is an economically important plant pathogen with unusually large host range. The Moko (banana) and NPB (not pathogenic to banana) strain groups are closely related but adapted distinct hosts. Previous comparative genomics studies uncovered very few differences that could account for the range difference between these pathotypes. To better understand basis of this specificity, we used RNAseq profile transcriptomes R. under in vitro planta conditions....
The soilborne pathogen Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4) is currently devastating banana production worldwide. Once introduced, it not possible to eradicate the from soils where can survive for decades. only management option available then replace Foc TR4-susceptible with -resistant varieties. Timely detection of pathogen, however, an important strategy prevent introduction TR4 into new areas and its spread infested sites. In this study, a single-tube technique was...
Xanthomonas citri pv. (Xcc) and X. aurantifolii (Xca) are causal agents of Citrus Bacterial Canker (CBC), a devastating disease that severely affects citrus plants. They harmful organisms not reported in Europe or the Mediterranean Basin. Host plants Rutaceae family, including genera Citrus, Poncirus, Fortunella, their hybrids. In addition, other ornamental interest as susceptible, but results uniform sometimes incongruent. We evaluated susceptibility 32 accessions family belonging to...
Bacterial wilt caused by the Ralstonia solanacearum species complex (RSSC) is a major threat to vegetable crops in Madagascar. For more effective disease management, surveys were carried out main production areas of country, leading collection 401 new RSSC isolates. Phylogenetic assignment isolates revealed high prevalence phylotype I sequevar 18. This result contrasts sharply with epidemiological pattern neighboring islands, including Reunion Island, Comoros, Mayotte, Mauritius, Rodrigues,...
Abstract Background Asiatic Citrus Canker, caused by Xanthomonas citri pv. citri, severely impacts citrus production worldwide and hampers international trade. Considerable regulatory procedures have been implemented to prevent the introduction establishment of X. into areas where it is not present. The effectiveness this surveillance largely relies on availability specific sensitive detection protocols. Although several PCR- or real-time PCR-based methods are available, most them showed...
A thorough knowledge of genotypic and phenotypic variations (e.g., virulence, resistance to antimicrobial compounds) in bacteria causing plant disease outbreaks is key for optimizing surveillance management. Using a comprehensive strain collection, tandem repeat-based genotyping techniques pathogenicity assays, we characterized the diversity X. citri pv. from South West Indian Ocean (SWIO) region. Most strains belonged prevalent lineage 1 pathotype that has wide host range among rutaceous...
Cassava brown streak disease (CBSD) has emerged as the most important viral of cassava (Manihot esculenta) in Africa and is a major threat to food security. The expanding CBSD epidemic East Central caused by two ipomoviruses (family Potyviridae), virus (CBSV; Monger et al., 2) Ugandan (UCBSV; Winter 5). In 2014, symptoms yellowing on leaves necrotic rot tuberous roots different landraces west coast Mayotte (Maoré) were associated with UCBSV (Roux-Cuvelier 2014). Similar observed April 2015...
ABSTRACT We report here the draft genome sequence of Xanthomonas axonopodis pv. allii strain CFBP 6369, causal agent bacterial blight onion. The has a size 5,425,942 bp and G+C content 64.4%.
The Ralstonia solanacearum species complex (RSSC), composed of three and four phylotypes, are globally distributed soil-borne bacteria with a very broad host range. In 2009, devastating potato bacterial wilt outbreak was declared in the central highlands Madagascar, which reduced production vegetable crops including potato, eggplant, tomato pepper. A molecular epidemiology study Malagasy RSSC strains carried out between 2013 2017 identified R . pseudosolanacearum (phylotypes I III)...
Fusarium wilt of banana, caused by the soil-borne pathogen oxysporum f. sp. cubense (Foc), is a major constraint to banana production worldwide (Viljoen et al., 2020). Currently, Cavendish bananas are severely affected Foc Tropical Race 4 (TR4) globally. In Africa, TR4 was first detected in northern Mozambique 2013 2020), and has since been found on island Mayotte Channel off coast southeastern Africa (Aguayo 2021). early 2023, severe leaf-yellowing wilting plants observed at several small...
Asiatic citrus canker, one of the most important diseases citrus, is caused by Xanthomonas citri pv. citri. It has high economic impact and can spread easily, disease difficult to manage; it a quarantine organism in many citrus-producing countries. X. been separated into three subpathotypes (A, A * , w ) that differ host range geographical distribution, thus creating need differentiate for surveillance management. Availability useful diagnostic tools cornerstone successful surveillance,...
We present here the draft genome sequences of bacterial pathogens Araceae family, Xanthomonas axonopodis pv. dieffenbachiae LMG 695 and campestris syngonii 9055, differing in host range. A comparison between will help understand mechanisms involved tissue specificity adaptation to plants.