A5025468921- Plant-Microbe Interactions and Immunity
- Plant Pathogens and Fungal Diseases
- Horticultural and Viticultural Research
- Plant Pathogenic Bacteria Studies
- Mycorrhizal Fungi and Plant Interactions
- Fermentation and Sensory Analysis
- Legume Nitrogen Fixing Symbiosis
- Nematode management and characterization studies
- Plant Parasitism and Resistance
- Plant Stress Responses and Tolerance
- French Urban and Social Studies
- Plant Physiology and Cultivation Studies
- Yeasts and Rust Fungi Studies
- Postharvest Quality and Shelf Life Management
- Forest Insect Ecology and Management
- Plant tissue culture and regeneration
- Agriculture, Plant Science, Crop Management
- Plant Pathogens and Resistance
- Fungal Plant Pathogen Control
- Plant Disease Management Techniques
- Nanocomposite Films for Food Packaging
- Mycotoxins in Agriculture and Food
- Wheat and Barley Genetics and Pathology
- Composting and Vermicomposting Techniques
- Diet, Metabolism, and Disease
Université de Reims Champagne-Ardenne
2016-2025
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2021-2025
Centre National de la Recherche Scientifique
2015-2025
Résistance Induite et Bioprotection des Plantes
2015-2024
Stress Environnementaux et Biosurveillance des Milieux Aquatiques
2023
CNR de la Résistance aux Antibiotiques
2015-2020
Comité Champagne
2013-2017
Université Laval
1997-2000
ABSTRACT Patterns of colonization Vitis vinifera L. cv. Chardonnay plantlets by a plant growth-promoting bacterium, Burkholderia sp. strain PsJN, were studied under gnotobiotic conditions. Wild-type PsJN and genetically engineered derivatives this tagged with gfp (PsJN:: 2x) or gusA 11) genes used to enumerate visualize tissue colonization. The rhizospheres 4- 5-week-old five developed leaves inoculated bacterial suspensions. Epiphytic endophytic patterns then monitored dilution plating...
In vitro inoculation of Vitis vinifera L. cv. Chardonnay explants with a plant growth-promoting rhizobacterium, Burkholderia phytofirmans strain PsJN, increased grapevine growth and physiological activity at low temperature. There was relationship between endophytic bacterial colonization the plantlets their both ambient (26 degrees C) (4 temperatures sensitivities to chilling. The major benefits bacterization were observed on root (11.8- 10.7-fold increases 26 C 4 C, respectively) plantlet...
A Gram-negative, non-sporulating, rod-shaped, motile bacterium, with a single polar flagellum, designated strain PsJN T , was isolated from surface-sterilized onion roots. This isolate proved to be highly effective plant-beneficial and able establish rhizosphere endophytic populations associated various plants. Seven related strains were recovered Dutch soils. Based on 16S rRNA gene sequence data, the identified as representing member of genus Burkholderia they closely fungorum (98·7 %)...
Low temperatures damage many temperate crops, including grapevine, which, when exposed to chilling, can be affected by symptoms ranging from reduced yield up complete infertility. We have previously demonstrated that Burkholderia phytofirmans PsJN, a plant growth-promoting rhizobacteria (PGPR) colonizes is able reduce chilling-induced damage. hypothesized the induced tolerance may explained at least partly impact of bacteria on grapevine photosynthesis or carbohydrate metabolism during cold...
Crop production stands as a pivotal pillar of global food security, but its sustainability faces complex challenges from plant diseases, which pose substantial threat to agricultural productivity. Climate change significantly alters the dynamics pathogens, primarily through changes in temperature, humidity, and precipitation patterns, can enhance virulence spread various diseases. Indeed, increased frequency extreme weather events, is direct consequence climate change, creates favorable...
The colonization pattern of Vitis vinifera L. by Burkholderia phytofirmans strain PsJN was determined using grapevine fruiting cuttings with emphasis on putative inflorescence under nonsterile conditions. Two-week-old rooted plants harbouring flower bud initials, grown in soil, were inoculated PsJN∷gfp2x. Plant subsequently monitored at various times after inoculation plate counts and epifluorescence and/or confocal microscopy. Strain chronologically detected the root surfaces, endorhiza,...
Several endophytic bacteria reportedly induce resistance to biotic stress and abiotic tolerance in several plant species. Burkholderia phytofirmans PsJN is a plant-growth-promoting rhizobacterium (PGPR) that able colonize grapevine tissues gray mold. Further, induces physiological changes increase low nonfreezing temperatures. To better understand how induced the observed phenomena, stress-related gene expression metabolite accumulation were monitored 6-week-old Chardonnay plantlets after...
Non-self-recognition of microorganisms partly relies on the perception microbe-associated molecular patterns (MAMPs) and leads to activation an innate immune response. Bacillus subtilis produces three main families cyclic lipopeptides (LPs), namely surfactins, iturins fengycins. Although LPs are involved in induced systemic resistance (ISR) activation, little is known about defence responses by these molecules their involvement local fungi. Here, we showed that purified surfactin,...
Plant growth-promoting rhizobacteria (PGPR) are beneficial microorganisms that colonize the rhizosphere of many plant species and confer effects, such as an increase in growth. PGPR also well known inducers systemic resistance to pathogens plants. However, molecular mechanisms involved locally after direct perception these bacteria by cells still remain largely unknown. Burkholderia phytofirmans strain PsJN is endophytic colonizes grapevine protects against grey mould disease caused Botrytis...
Several plant growth-promoting rhizobacteria (PGPR) are known to improve tolerance multiple stresses, including low temperatures. However, mechanisms underlying this protection still poorly understood. The aim of study was evaluate the role endophytic PGPR, Burkholderia phytofirmans strain PsJN (Bp PsJN), on Arabidopsis thaliana cold using photosynthesis parameters as physiological markers. Under standard conditions, our results indicated that Bp inoculation led growth promotion plants...
Plant innate immunity serves as a surveillance system by providing the first line of powerful weapons to fight against pathogen attacks. Beneficial microorganisms and Microbial-Associated Molecular Patterns might act signals trigger this immunity. Burkholderia phytofirmans PsJN, highly efficient plant beneficial endophytic bacterium, promotes growth in wide variety plants including grapevine. Further, bacterium induces resistance abiotic biotic stresses. However, no study has deciphered...