A5046223794- Plant-Microbe Interactions and Immunity
- Fermentation and Sensory Analysis
- Horticultural and Viticultural Research
- Plant Pathogenic Bacteria Studies
- Carbohydrate Chemistry and Synthesis
- Plant Parasitism and Resistance
- Plant Pathogens and Fungal Diseases
- Legume Nitrogen Fixing Symbiosis
- Wine Industry and Tourism
- Photosynthetic Processes and Mechanisms
- Fungal Plant Pathogen Control
- Glycosylation and Glycoproteins Research
- Plant Stress Responses and Tolerance
- Polyamine Metabolism and Applications
- Plant nutrient uptake and metabolism
- Biochemical Analysis and Sensing Techniques
- Phytase and its Applications
- Plant Physiology and Cultivation Studies
- Microbial bioremediation and biosurfactants
- Sensory Analysis and Statistical Methods
- Meat and Animal Product Quality
- Plant pathogens and resistance mechanisms
- Plant biochemistry and biosynthesis
- Plant Virus Research Studies
- Ginseng Biological Effects and Applications
Université de Reims Champagne-Ardenne
2014-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2021-2024
Résistance Induite et Bioprotection des Plantes
2016-2024
Centre National de la Recherche Scientifique
2015-2023
CNR de la Résistance aux Antibiotiques
2016-2019
Université de Lorraine
2013
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...
Environmental factors including drought stress may modulate plant immune responses and resistance to pathogens. However, the relationship between mechanisms of tolerance pathogens remained unknown. In this study, effects on polyamine (PA) homeostasis were investigated in two grapevine genotypes differing their tolerance; Chardonnay (CHR), as sensitive Meski (MSK), tolerant. Under conditions, MSK plants showed lowest leaf water loss reduction photosynthetic efficiency, expressed a lower level...
Although induced systemic resistance (ISR) is well-documented in the context of plant-beneficial bacteria interactions, knowledge about local and molecular biochemical defense responses before or upon pathogen infection grapevine very scarce. In this study, we first investigated capacity plants to express immune at both above- below-ground levels interaction with a beneficial bacterium, Pseudomonas fluorescens PTA-CT2. We then explored whether extent priming state could contribute...
Plant innate immunity is activated upon perception of invasion pattern molecules by plant cell-surface immune receptors. Several bacteria the genera Pseudomonas and Burkholderia produce rhamnolipids (RLs) from l-rhamnose (R)-3-hydroxyalkanoate precursors (HAAs). RL HAA secretion required to modulate bacterial surface motility, biofilm development, thus successful colonization hosts. Here, we show that lipidic secretome opportunistic pathogen aeruginosa, mainly comprising RLs HAAs, stimulates...
Plants harbor various beneficial microbes that modulate their innate immunity, resulting in induced systemic resistance (ISR) against a broad range of pathogens. Camalexin is an integral part Arabidopsis but the contribution its biosynthesis ISR poorly investigated. We focused on camalexin accumulation primed by two bacteria, Pseudomonas fluorescens and Bacillus subtilis, role Botrytis cinerea syringae Pst DC3000. Our data show colonization thaliana roots bacteria triggers both pathogens...
Abiotic factors inducing osmotic stress can influence the plant immune response and resistance to pathogen infections. In this study, effect of polyethylene glycol (PEG)- sucrose-induced on polyamine (PA) homeostasis basal in grapevine plantlets before after Botrytis cinerea infection was determined. Pharmacological approaches were also addressed assess contribution stress-induced PA oxidation regulation defence responses susceptibility B. cinerea. Following or infection, linked enhanced...
Plants harbor various beneficial bacteria that modulate their innate immunity, resulting in induced systemic resistance (ISR) against pathogens. However, the immune mechanisms underlying ISR triggered by Bacillus spp. and Pseudomonas pathogens with different lifestyles are not yet clearly elucidated. Here, we show root drenching of Arabidopsis plants fluorescensPTA-CT2 subtilis PTA-271 can induce necrotrophic fungus B. cinerea hemibiotrophic bacterium syringae Pst DC3000. In absence pathogen...
Measurements of CO2 fluxes outgassing from a flute poured with standard Champagne wine initially holding about 11 g L−1 dissolved were presented, in tasting conditions, all along the first 10 min following pouring process. Experiments performed at three sets temperature, namely, 4 °C, 12 and 20 respectively. It was demonstrated that lower champagne volume flute. Therefore, its progressive loss concentration time, which constitutes analytical proof low temperatures prolong drink's chill helps...
Pouring champagne into a glass is far from being consequenceless with regard to its dissolved CO2 concentration. Measurements of losses during serving were done bottled Champagne wine initially holding 11.4 ± 0.1 g L−1 CO2. at three temperatures (i.e., 4, 12, and 18 °C) for two different ways champagne-like beer-like way serving). The was found impact concentration significantly less. Moreover, the higher temperature is, loss pouring process, which finally constitutes first analytical proof...
Abstract Stimulation of plant innate immunity by natural and synthetic elicitors is a promising alternative to conventional pesticides for more sustainable agriculture. Sugar-based bolaamphiphiles are known their biocompatibility, biodegradability low toxicity. In this work, we show that Synthetic Rhamnolipid Bolaforms (SRBs) have been synthesized green chemistry trigger Arabidopsis immunity. Using structure-function analysis, demonstrate SRBs, depending on the acyl chain length,...
Measurements of CO2 fluxes outgassing from glasses containing a standard Champagne wine initially holding about 11.5 g L−1 dissolved were presented, in tasting conditions, during the first 10 min following pouring process. Experiments performed at room temperature, with flute and coupe, respectively. The progressive loss concentration time was found to be significantly higher coupe than flute, which finally constitutes analytical proof that prolongs drink's chill helps it retain its...
In this work, Saccharomyces cerevisiae PlR1, a strain isolated from Pinot noir grapes in the Champagne area, was shown to secrete an acid proteolytic activity against bovine serum albumin. This detectable cell-free culture supernatants at beginning of exponential growth phase and increased with yeast growth. Using zymography method, only one protease band molecular mass 72 kDa observed. extracellular detected pH range 2 4 maximal value 2.5 38 °C completely inhibited by pepstatin A. The...
Abiotic factors inducing osmotic stress can affect plant immunity and resistance against pathogen attack. Although a number of studies have characterized grapevine responses to various forms biotic abiotic stresses, the relationships between response susceptibility mature berries Botrytis cinerea still remain unknown. In this study, we investigated effects ABA on defense before after B. infection. We focused possible involvement polyamines in interaction cinerea. showed that induced by PEG...
As a result of the increasing economic impact grapevine trunk diseases on viticulture worldwide, efficient and viable control strategies are urgently needed. However, understanding both plant-pathogen interactions plant physiological changes related to these is fundamental such an achievement. In this study, we analyzed effect inoculation with Botryosphaeria dieback fungal agents, Neofusicoccum parvum Diplodia seriata, without inflorescence removal at onset G stage (separated clusters), I...
Two Neofusicoccumparvum isolates and a UV mutant were characterized for their phytotoxin production in vitro, pathogenicity on grapevine, genome sequenced. The isolate Np-Bt67 produced high level of (-)-terremutin, but almost no (R)-mellein, it was the most aggressive triggering apoplexy. Similar symptoms not induced by purified (-)-terremutin. Bourgogne S-116 (Np-B) 3-fold less (-)-terremutin amounts grapevine than Np-Bt67. UV9 obtained from Np-B (NpB-UV9) longer overproduced (R)-mellein...
Measurements of dissolved CO(2) concentrations from Champagne bottles initially holding the same level after having been elaborated (close to 11.5 g L(-1)), but experienced different periods aging corked with natural cork stoppers, were done. Losses close 3.5 L(-1) by oldest samples aged for about 75 months reported. This very significant loss was logically interpreted as a consequence continuous diffusion gaseous through pores stopper. By combining principle porous medium Henry's law (which...
We show that macrolactonization of gluco- and rhamnolipids dramatically interfere with their surfactant properties biological activity.
The use of natural bio-based compounds becomes an eco-friendly strategy to control plant diseases. Rare sugars would be promising as inducers "sweet immunity". present study aimed investigate the induced resistance grapevine leaves against Plasmopara viticola and Botrytis cinerea by a rare sugar-based product (IFP48) its active ingredient D-tagatose (TAG), in order elucidate molecular mechanism involved defense-related metabolic regulations before after pathogen challenge. Data showed that...
Gray mold, caused by Botrytis cinerea, is one of the most destructive diseases grapevine and controlled with an intense application fungicides. As alternatives to chemicals, beneficial microbes may promote plant health stimulating plant's immune system. An actinomycete, Streptomyces anulatus S37, has been screened from rhizosphere microbiome healthy Vitis vinifera on basis its ability growth induce resistance against various phytopathogens, including B. cinerea. However, molecular mechanisms...