A5000440295- Plant Parasitism and Resistance
- Plant Molecular Biology Research
- Plant and animal studies
- Allelopathy and phytotoxic interactions
- Seed Germination and Physiology
- Legume Nitrogen Fixing Symbiosis
- Plant nutrient uptake and metabolism
- Plant tissue culture and regeneration
- Plant Reproductive Biology
- Nematode management and characterization studies
- Photosynthetic Processes and Mechanisms
- Plant and Biological Electrophysiology Studies
- Insect-Plant Interactions and Control
- Plant-Microbe Interactions and Immunity
- Plant Diversity and Evolution
- Plant biochemistry and biosynthesis
- Plant Pathogens and Fungal Diseases
- RNA Research and Splicing
- Plant Gene Expression Analysis
- Agricultural pest management studies
- Nuts composition and effects
- Agronomic Practices and Intercropping Systems
- Plant Stress Responses and Tolerance
- Botanical Research and Chemistry
- Cassava research and cyanide
Nantes Université
2009-2025
Centre National de la Recherche Scientifique
2023-2025
Unité en Sciences Biologiques et Biotechnologies de Nantes
2022-2024
Laboratoire de Recherche en Sciences Végétales
2012-2020
Centre Val de Loire
2020
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020
Sécurité et Qualité des Produits d'Origine Végétale
2020
Leiden University
2011
Université de Tours
2003-2006
Centre National de la Propriété Forestière
1999-2004
Jasmonates are plant signalling molecules that play key roles in defence against insects and certain pathogens, among others by controlling the biosynthesis of protective secondary metabolites. In Catharanthus roseus, AP2/ERF-domain transcription factor ORCA3 controls jasmonate-responsive expression several genes encoding enzymes involved terpenoid indole alkaloid biosynthesis. gene is itself induced jasmonate. The promoter contains an autonomous element (JRE) composed a quantitative...
Plant defense against microbial pathogens depends on the action of several endogenously produced hormones, including jasmonic acid (JA) and ethylene (ET). In necrotrophic pathogens, JA ET signaling pathways synergize to activate a specific set genes PLANT DEFENSIN1.2 (PDF1.2). The APETALA2/Ethylene Response Factor (AP2/ERF)-domain transcription factor ORA59 acts as integrator is key regulator JA- ET-responsive PDF1.2 expression. present study was aimed at identification elements in promoter...
After a conditioning period, seed dormancy in obligate root parasitic plants is released by chemical stimulus secreted the roots of host plants. Using Phelipanche ramosa as model, experiments conducted this study showed that seeds require period at least 4 d to be receptive synthetic germination stimulant GR24. A cDNA-AFLP procedure on revealed 58 transcript-derived fragments (TDFs) whose expression pattern changed upon GR24 treatment. Among isolated TDFs, two up-regulated sequences...
Seed dormancy release of the obligate root parasitic plant, Phelipanche ramosa, requires a minimum 4-day conditioning period followed by stimulation host-derived germination stimulants, such as strigolactones. Germination is then mediated stimulant-dependent activation PrCYP707A1, an abscisic acid catabolic gene. The molecular mechanisms occurring during that silence PrCYP707A1 expression and regulate stimulant response are almost unknown. Here, global DNA methylation quantification...
Phelipanche ramosa is a major parasitic weed of Brassica napus. The first step in host-parasitic plant interaction stimulation parasite seed germination by compounds released from host roots. However, stimulants produced B. napus have not been identified yet. In this study, we characterized the that accumulate roots and are into rhizosphere. Eight glucosinolate-breakdown products were quantified gas chromatography-mass spectrometry. Two (3-phenylpropanenitrile 2-phenylethyl isothiocyanate...
The heterotrophic lifestyle of parasitic plants relies on the development haustorium, a specific infectious organ required for attachment to host roots. While haustorium is initiated upon chemodetection host-derived molecules in hemiparasitic plants, induction formation remains largely unknown holoparasitic species such as Phelipanche ramosa. This work demonstrates that root exudates plant Brassica napus contain allelochemicals displaying haustorium-inducing activity P. ramosa germinating...
Karrikins stimulate Arabidopsis thaliana germination, whereas parasitic weeds of the Orobanchaceae family have evolved to respond host-exuded compounds such as strigolactones, dehydrocostus lactone, and 2-phenylethyl isothiocyanate. In Phelipanche ramosa, strigolactone-induced germination was shown require one CYP707A proteins involved in abscisic acid catabolism. Here, gene expression were analysed investigate role CYP707As both plants upon perception stimulants, after using pharmacological...
Jasmonates are plant signaling molecules that play key roles in protection against certain pathogens and insects by switching on the expression of genes encoding defense proteins including enzymes involved biosynthesis toxic secondary metabolites. In Catharanthus roseus, ethylene response factor (ERF) transcription ORCA3 controls jasmonate-responsive activation terpenoid indole alkaloid biosynthetic genes. gene is itself induced jasmonate. Its promoter contains an autonomous element (JRE)....
The plant-parasitic plant interaction is a interesting model to study sink-source relationship and phloem unloading. parasitic plants, such as the achlorophyllous Phelipanche ramosa, connect host through haustorium act supernumerary sinks for host-derived photoassimilates, primarily sucrose. application of fluorescent symplastic tracer, carboxyfluorescein (CF) derived from diacetate (CFDA), leaves (Brassica napus) showed direct connections at host-parasite interface. These experiments also...
Broomrapes (Phelipanche and Orobanche spp.) witchweeds (Striga are parasitic weeds that increasingly threatening crops worldwide. Seeds of these species rely on host-derived signals such as strigolactones to germinate. While cytokinins were also reported germination inducers witchweeds, their role during broomrapes remains unexplored. Our study shows some but not all stimulate Striga hermonthica independently strigolactones, high concentrations bioactive trigger seedlings differentiate into...
Image analysis is increasingly used in plant phenotyping. Among the various imaging techniques that can be phenotyping, chlorophyll fluorescence allows of impact biotic or abiotic stresses on leaves. Numerous parameters may measured calculated, but only a few produce contrast given condition. Therefore, automated procedures help screening image datasets are needed, especially perspective high-throughput
Until recently, the roles of plant MADS-box genes have mainly been characterized during inflorescence and flower differentiation. In order to precise AGAMOUS-LIKE 12, one few preferentially expressed in roots, we placed its cDNA under control double 35S CaMV promoter produce transgenic walnut tree Arabidopsis plants. Juglans sp., somatic embryos showed significantly higher germination rates but abnormal development their shoot apex prevented conversion into addition, a wide range...
In Western France, rapeseed ( Brassica napus) cultivation faces substantial yield losses due to the root holoparasitic plant Phelipanche ramosa. However, recent observations have shown a reduction in parasitism within previously heavily infested fields. This study investigates two neighboring soils with distinct levels of parasitic infestation, considered suppressive and conducive. Using cocultivation system napus P. ramosa, we comprehensively examined rhizosphere exudates, attachment, soil...