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INRA
24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal UMR408 logo Avignon Univ

Home Unit UMR408

Quality and process

Team leaders : Carine Le Bourvellec and Sylvie Bureau

Our aim is to characterize and understand the mechanisms that drive the fruit and vegetable qualities during processing and storage processes. We focus our research on micronutrients: secondary metabolites and vitamins. Secondary metabolism compounds and micronutrients are increasingly taken into account in the quality of processed fruits and vegetables because of their role in sensory quality and especially in consumer health (vitamins, antioxidants). For this latter aspect, it is necessary to consider not only the quantity of micronutrients in the final food but also their "bioaccessibility" in the digestive tract. Bioaccessibility will depend on the interactions between micronutrients and the matrix during its destructuration (destruction of plant tissues and cells) and its reorganization (molecular interactions in the processed product) during processing and digestion. The study of the processes begins with the raw material and its storage, and continues until the food in the digestive tract of the consumer (this last point being treated with the Team “Micronutrients : reactivity and digestion”)

The team's themes are:

-Develop methods to characterize the quality of fresh and processed fruits and vegetables, involving chemical analyses (sugars, oraganic acis, polyphenols, carotenoids, vitamins…), high-throughput methods based on infrared spectroscopie, mechanical and micromechanical methods.

spectromètre PIR

-Understand and measure the behavior of micronutrients within the structures of the matrix at the tissue and cell scales, during processing (diffusion, release by destruction of the tissue structure...). Two aspects are dealt with: the stability of the micronutrients, depending on the availability of oxygen, the pH and the composition of the medium, and the matter exchanges, related to cell lysis and the diffusion of molecules in and outside the plant tissue.

Extraction de caroténoïdes

-Study interactions between the micronutrients and the macromolecules of the matrix, in particular the cell wall polysaccharides (adsorption, absorption, chemical bonds...). These interactions occur when cell structures are degraded during processing. We study in particular the interactions between procyanidins and the polysaccharides constituting the plant walls.

HPLC

Team staff

Marielle Bogé (TR), Romain Bott (AI), Sylvie Bureau (IE), Caroline Garcia (TR), Barbara Gouble (IE),  Carine Le Bourvellec (CR), Alexandre Leca (CR), David Page (CR), Sylvaine Régis (IE), Patrice Reling (TR), Gisèle Riqueau (AT), Agnès Rolland-Sabaté (IE), Line Touloumet (TR), Thibault Soubrat (AI CDD)

Ph-D students and Ph-D graduate students : Alexandra Burgy, Sarra Cherif (co-direction), Aliénor Dutheuil de la Rochère, Weijie Lan, Xuwei Liu, Carla Paes-Martin

Industrial group : Aurélie Cendrès, Engineer

National collaborations : CTCPA ; UMR Genial, Massy ; UMR MOISA, Montpellier ; ESA Angers ; GAFL ; UMR Qualisud ; UE Gotheron ; URBIA Nantes ; UMR IATE ; UMR NORT, Marseille ; UMR MEDIS et UMR UNH Clermont-Ferrand

International collaborations : Federal University of Parana, Curitiba, Brasil ; University of Coahuila, Mexico ; University of  Franceville, Gabon ; IRTA Girona, Spain; IO Skierniewice, Poland ; CRIC, Barcelona, Spain; INRAT, Tunis, Tunisia.