A5034635230- Plant-Microbe Interactions and Immunity
- Legume Nitrogen Fixing Symbiosis
- Plant pathogens and resistance mechanisms
- Plant tissue culture and regeneration
- Metabolism and Genetic Disorders
- Plant Pathogens and Fungal Diseases
- Microbial bioremediation and biosurfactants
- Plant Pathogenic Bacteria Studies
- Biochemical and Structural Characterization
- Photosynthetic Processes and Mechanisms
- Lipid metabolism and biosynthesis
- Surfactants and Colloidal Systems
- Polysaccharides and Plant Cell Walls
- Plant Virus Research Studies
- Plant biochemistry and biosynthesis
- Lipid Membrane Structure and Behavior
- Antimicrobial Peptides and Activities
- Plant Molecular Biology Research
- GABA and Rice Research
- Peroxisome Proliferator-Activated Receptors
- Fungal Plant Pathogen Control
- Plant Stress Responses and Tolerance
- Nematode management and characterization studies
- Sphingolipid Metabolism and Signaling
- Insect-Plant Interactions and Control
Université de Technologie de Compiègne
2012-2025
Centre National de la Recherche Scientifique
2010-2024
Sorbonne Université
2018-2024
GTx (United States)
2007
Institut des Sciences du Végétal
2002
In Arabidopsis, the basic leucine zipper transcription factor ABI5 activates several late embryogenesis–abundant genes, including AtEm1 and AtEm6. However, expression of many other seed maturation genes is independent ABI5. We investigated possibility that homologs also participate in regulation gene during maturation. identified 13 ABI5-related Arabidopsis genomic sequence. RNA gel blot analysis showed seven these are active they display distinct kinetics. isolated characterized two mutant...
Rhamnolipids (RLs) are amphiphilic molecules naturally produced by some bacteria with a large range of biological activities. Although studies report their potential interest in plant protection, evaluation effects and efficiency on annual crops worldwide agronomic is lacking. The main objective this work was to investigate elicitor protective activities rapeseed crop species while evaluating physiological effects. Here we that RLs from Pseudomonas aeruginosa secretome trigger an effective...
Rhamnolipids (RLs) are potential biocontrol agents for crop culture protection. Their mode of action has been proposed as dual, combining plant protection activation and antifungal activities. The present work focuses on the interaction natural RLs with fungi membrane models at molecular scale. Representative were constructed was studied by Fourier transform infrared (FTIR) deuterium nuclear magnetic resonance (2H NMR) spectroscopic measurements. Molecular dynamic (MD) simulations performed...
Rhamnolipids (RLs) and fengycins (FGs) are amphiphilic lipid compounds from bacteria secretomes proposed to replace synthetic pesticides for crop protection. They both display plant defense triggering properties direct antimicrobial activities. In particular, they have well reported antifungal effects against phytopathogenic fungi. RLs FGs considered act through a interaction with membrane lipids destabilization of microorganism plasma membrane, thereby limiting the risk resistance...
Abstract In Arabidopsis thaliana cell cultures, the peptaibol alamethicin induced a form of active death that was associated with shrinkage and DNA fragmentation. The transfer mature A. plants from peptide‐free medium to containing moderate concentration caused development lesions in leaves after few days. These were characterized by death, deposition callose, production autofluorescent phenolic compounds, transcription defense genes, just like hypersensitive response pathogen attack....
The rapeseed crop (Brassica napus) has to cope with fungal diseases that significantly impacts yields. In particular, the pathogen Leptosphaeria maculans, causal agent of blackleg disease (also named Phoma stem canker), is a worldwide issue this crop. Considering environmental concerns, it essential propose alternative natural compounds for protection reduce chemical fungicide use. Here we report data showing efficacy semipurified rhamnolipid (RL) mixes from bacterial origin protect against...
Introduction: Rhamnolipids (RLs) are secondary metabolites naturally produced by bacteria of the genera Pseudomonas and Burkholderia with biosurfactant properties. A specific interest raised from their potential as biocontrol agents for crop culture protection in regard to direct antifungal elicitor activities. As other amphiphilic compounds, a interaction membrane lipids has been suggested key feature perception subsequent activity RLs. Methods: Molecular Dynamics (MD) simulations used this...
The rapeseed crop is susceptible to many pathogens such as parasitic plants or fungi attacking aerial root parts. Conventional plant protection products, used intensively in agriculture, have a negative impact on the environment well human health. There therefore growing demand for development of more planet-friendly alternative methods biocontrol compounds. Natural rhamnolipids (RLs) can be elicitors defense mechanisms. These glycolipids, from bacteria secretome, are biodegradable,...
Plant genomes generally contain two aldehyde dehydrogenase 10 (ALDH10) genes, which encode NAD+-dependent enzymes. These oxidize various aminoaldehydes that are produced by the catabolism of amino acids and polyamines. ALDH10s closely related to animal fungal trimethylaminobutyraldehyde dehydrogenases (TMABADHs) involved in synthesis γ-butyrobetaine, precursor carnitine. Here, we explore ability Arabidopsis thaliana proteins AtALDH10A8 AtALDH10A9 aminoaldehydes. We demonstrate these enzymes...
Rhamnolipids (RLs) and Fengycins (FGs) are biosurfactants with very promising antifungal properties proposed to reduce the use of synthetic pesticides in crops. They amphiphilic molecules, both known target plasma membrane. act differently on Botrytis cinerea Sclerotinia sclerotiorum, two close Sclerotiniaceae phytopathogenic fungi. RLs more efficient at permeabilizing S. FGs B. mycelial cells. To study link between lipid membrane composition activity FGs, we analyzed profiles sclerotiorum....
Ampullosporin A is an antimicrobial, neuroleptic peptaibol, the behavior of which was investigated in different membrane mimetic environments made egg yolk L - α -phosphatidylcholine. In monolayers, peptaibol adopted a mixed /3 10 -helical structure with in-plane orientation. The binding step followed by peptide insertion into lipid monolayer core. relevance inner leaflet nature studied comparing ampullosporin on hybrid bilayer, this rigid alkane layer, and supported fluid bilayers. examined...
Abstract The plant‐metabolic response to amphipathic peptides produced by the soil fungi of genus Trichoderma remains largely unknown. present investigation was undertaken examine death process in alamethicin‐treated Arabidopsis thaliana plantlets. rapid triggered alamethicin (at 50 μ M ) shown be associated with protein‐synthesis arrest and specific cleavage 18S 25S ribosomal RNA. use an inhibitor nitric oxide (NO) synthases NO scavenger suggested that rRNA suppressed NO. Experiments...
The present data profile the large scale transcriptome changes in Arabidopsis thaliana Col-0 seedlings exposed to mono-rhamnolipids (Mono-RLs) from Pseudomonas aeruginosa secretome. Bacterial rhamnolipids (RLs) are biosurfactant known trigger plant defense mechanisms and have a great potential for crop culture protection as environmental-friendly biocontrol solution. They thought interact directly with membrane lipids induce gene expression towards phytopathogens. However, date, on global...
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