A5071824616- Bacterial biofilms and quorum sensing
- Plant-Microbe Interactions and Immunity
- Plant Pathogenic Bacteria Studies
- Bacterial Genetics and Biotechnology
- Plant Pathogens and Fungal Diseases
- Bacteriophages and microbial interactions
- Plant and Biological Electrophysiology Studies
- Plant Reproductive Biology
- Polysaccharides and Plant Cell Walls
- Biochemical and Structural Characterization
- Legume Nitrogen Fixing Symbiosis
- Muscle and Compartmental Disorders
- Plant Molecular Biology Research
- Transgenic Plants and Applications
- Vibrio bacteria research studies
- Biochemical and biochemical processes
- Cystic Fibrosis Research Advances
- Mycorrhizal Fungi and Plant Interactions
- Microbial Inactivation Methods
- Microbial Metabolism and Applications
- Antimicrobial Resistance in Staphylococcus
- Historical Medical Research and Treatments
- Plant Parasitism and Resistance
- Biofuel production and bioconversion
- Microbial Community Ecology and Physiology
Université de Rouen Normandie
2013-2021
Seoul National University
2021
Normandie Université
2013-2020
Rhodococcus erythropolis is an environmental Gram-positive Actinobacterium with a versatile metabolism involved in various bioconversions and degradations. Rhodococci are best known for their great potential numerous decontamination industrial processes. However, they can also prevent plant disease by disrupting quorum sensing-based communication of Gram-negative soft-rot bacteria, degrading N-acyl-homoserine lactone signaling molecules. Such biocontrol activity results partly from the...
The biocontrol agent Rhodococcus erythropolis disrupts virulence of plant and human Gram-negative pathogens by catabolizing their N-acyl-homoserine lactones. This quorum-quenching activity requires the expression qsd (quorum-sensing signal degradation) operon, which encodes lactonase QsdA fatty acyl-CoA ligase QsdC, involved in catabolism lactone ring acyl chain moieties signaling molecules, respectively. Here, we demonstrate regulation operon a TetR-like family repressor, QsdR. repression...
Type VI secretion systems (T6SSs) are contractile bacterial multiprotein nanomachines that enable the injection of toxic effectors into prey cells. The Pseudomonas fluorescens MFE01 strain has T6SS antibacterial activity and can immobilise competitive bacteria through T6SS. Hcp1 (hemolysin co-regulated protein 1), a constituent inner tube, is involved in such cell inhibition motility. Paradoxically, disruption hcp1 or tail tssC genes results loss mucoid motile phenotypes MFE01. Here, we...
Confocal laser-scanning microscopy was chosen to observe the colonization and damage caused by soft rot Pectobacterium atrosepticum protection mediated biocontrol agent Rhodococcus erythropolis. We developed dual-color reporter strains suited for monitoring quorum-sensing quorum-quenching activities leading maceration or biocontrol, respectively. A constitutively expressed cyan red fluorescent protein served as a cell tag plant colonization, while an inducible expression system based on...
Biofilms are complex structures formed by a community of microbes adhering to surface and/or each other through the secretion an adhesive and protective matrix. The establishment these requires coordination action between microorganisms powerful communication systems such as quorum-sensing. Therefore, auxiliary bacteria capable interfering with means could be used prevent biofilm formation development. phytopathogen Rhizobium rhizogenes, which causes hairy root disease forms large biofilms...
In many Gram-negative bacteria, virulence, and social behavior are controlled by quorum-sensing (QS) systems based on the synthesis perception of N-acyl homoserine lactones (AHLs). Quorum-quenching (QQ) is currently used to disrupt bacterial communication, as a biocontrol strategy for plant crop protection. this context, Gram-positive bacterium Rhodococcus erythropolis uses catabolic pathway control virulence soft-rot pathogens degrading their AHL signals. This QS signal degradation requires...
Pseudomonas fluorescens is considered to be a typical plant-associated saprophytic bacterium with no pathogenic potential. Indeed, some P. strains are well-known rhizobacteria that promote plant growth by direct stimulation, preventing the deleterious effects of pathogens, or both. C7R12 rhizosphere-competent strain effective as biocontrol agent and promotes arbuscular mycorrhization. This has been studied in detail, but visual evidence ever obtained for extracellular structures potentially...
The geocaulosphere is home to microbes that establish communication between themselves and others disrupt them. These cell-to-cell systems are based on the synthesis perception of signaling molecules, which best known belong N-acyl-homoserine lactone (AHL) family. Among indigenous bacteria, certain Gram-positive actinobacteria can sense AHLs produced by soft-rot Gram-negative phytopathogens degrade quorum-sensing AHL signals impair expression virulence factors. We mimicked this interaction...