Annuaire

Enseignant chercheur

M. Vincent Foray

Enseignant-chercheur spécialisé sur les interactions entre les organismes et leur environnement, notamment dans le contexte des changements climatiques

Coordonnées

Parc de Grandmont 37200 TOURS

Mail
vincent.foray@univ-tours.fr
Site internet
https://www.researchgate.net/profile/Vincent_Foray

Discipline(s)

Biologie des populations et écologie

Discipline(s) enseignée(s)

Mes enseignements se concentrent sur deux disciplines :
  • Génétique : "Génétique évolutive" (L3) et "Génétique des populations" (M1)
  • Biologie des organismes : "Diversité du monde vivant" (L1) et "Ecologie - Ethologie" (L1)

Thèmes de recherche

My research aims to understand the proximal and ultimate mechanisms linking genotype, phenotype and environment. More specifically, I am interested in the impact of temperature and endosymbiotic bacteria on the phenotype and fitness of insects. Currently, I am developing a project investigating the factors underlying the thermal adaptation of aphids, with a special focus on thermal heterogeneity and fluctuations.


Thermal biology

Temperature is probably the most structuring abiotic factors for ectotherm organisms, like insects. Insects have to cope with thermal fluctuations within their microhabitat and we need a comprehensive of their impacts to predict the ecological consequences of global changes. Due to the classical non-linear relationship between insect performance traits and temperature, one part of the answer resides in the Jensen Inequality, a mathematical property of non-linear function. However, thermal fluctuations are expected to induce time-dependent effect, like acclimation or accumulation of stress defects. Based on a comparative and integrative approach, my aim consists in deciphering the molecular, physiological and behavioral consequences of thermal fluctuations.


Symbiotic interactions

Aphid endosymbiontsAphids represent a valuable system model to study symbiotic associations. Like many invertebrates feeding on nutrient-deficient substrates, these sap feeding insects typically harbor a nutritional obligate endosymbiont, Buchnera aphidicola, that delivers essential amino acids that cannot be sufficiently taken up from the phloem. In addition, aphids can host facultative endosymbiont in the sense they only display beneficial effects to their host according to specific environmental conditions. Both obligate and facultative endosymbionts seem to play a role in aphid thermal tolerance and stressful temperatures can disrupt their association with their host. Thus, my general aim consists in characterizing i) the role of endosymbionts in thermal adaptation and ii) the impact of thermal conditions on symbiotic associations.

Activités / CV

Publications principales
* Contributions égales des auteurs
  • Renoz F, Pons I, Vanderpoorten A, Bataille G, Noël C, Foray V, Pierson V, Hance T. (2019) Evidence for Gut-Associated Serratia symbiotica in Wild Aphids and Ants Provides New Perspectives on the Evolution of Bacterial Mutualism in Insects. Microbial Ecology78 (1): 159-169
  • Foray V*, Perez-Jimenez MM*, Fattouh N, Landmann F. (2018) Wolbachia control stem cell behavior and stimulate germline proliferation in filarial nematodesDevelopmental Cell, 45: 198-211
  • Foray V, Desouhant E & Gibert P. (2014) The impact of thermal fluctuations on reaction norms in specialist and generalist parasitic wasps. Functional Ecology, 28: 411-423.
  • Foray V, Desouhant E, Voituron Y, Larvor V, Renault D, Colinet H & Gibert P. (2013) Does cold tolerance plasticity correlate with the thermal environment and metabolic profiles of a parasitoid wasp? Comparative Biochemistry & Physiology Part A: Molecular & Integrative Biology, 164: 77-83.
  • Foray V*, Pélisson PF*, Bel-Venner MC, Desouhant E, Venner S, Menu F, Giron D & Rey B. (2012) A handbook for uncovering the complete energetic budget in insects : the van Handel’s methods (1985a,b) revisited. Physiological Entomology, 37: 295-302. 


 

Informations complémentaires