The teacher-searchers

Plant Sciences and Agronomy Department

• Oenology
• Viticulture
• Sensory analysis
• Statistics

Regulation mechanisms and perception of specialized plant metabolites, in particular grape and wine aromas

• Agricultural engineer (ENSAT, 2001)
• Oenologist (Diplôme National d’Œnologue (National Enology Diploma) Toulouse, 2001)
• PhD (INP Toulouse, 2020)

• 2001 – 2004: Vinification in several foreign vineyards (Australia, California, Argentina, Italy and South Africa).
• 2004 – 2016: In charge of popularizing and communicating experimental results at the Institut Français de la Vigne et du Vin – Pôle Sud-Ouest. In charge of wine aroma experiments.

• Geffroy, O., Siebert, T., Guyot, E., Gazagnadou, F., Henon, A., Baerenzung dit Baron, T., Denat, M., Chervin, C., Herderich, M., Bilogrevic, E., & Sáenz-Navajas, MP. (2024). How do Syrah winemakers from two different French regions conceptualise peppery wines? OENO One, 58(1), 1–10.
• Geffroy, O., Laforge, J., Denat, M., Volmerange, L., & Peter, M. (2024). Are peppery notes the main negative driver of liking for young consumers in a Duras red wine made from a cool and wet season? OENO One, 58(1), 1–7.
• Geffroy, O., Aymard, F., Cuif, C., Baerenzung dit Baron, T., Denat, M., & Jacques, A. (2023). Olfactory threshold for rotundone in brandy is 10-fold higher than in wine and does not significantly increase with the complexity of the matrix. South African Journal of Enology and Viticulture, 24(2), 120–125.
• Nougarède, S., Diot, A., Maza, E., Samson, A., Olivier-Salvagnac, V., Caillé, S., Geffroy, O., & Chervin, C. (2023). Comparison of Check-All-That-Apply and Adapted-Pivot-Test methods for wine sensory characterization with a panel of untrained students. Journal of Sensory Studies, e12862.
• Chervin, C. & Geffroy, O. (2023). Ethylene impact on grapevine pistil temperature and fruit set. Journal of Plant Growth Regulation, 42, 5433–5437.
• Geffroy, O., Pasquier, G., Pages, M., & Violleau, F. (2022). Exploring the appreciation of a new range of ethanol reduction in Chardonnay and Syrah wines using a Consumer Rejection Threshold approach. OENO One, 56(4), 139–146
• Geffroy, O., Baerenzung dit Baron, T., Yobrégat, O., Denat, M. Simon, V., & Jacques, A. (2022). The SIFT-MS fingerprint of Vitis vinifera L. cv. Syrah berries is rather stable over the second part of maturation under warm conditions of climate. OENO One, 56(4), 147–155
• Beaulieu, A., Giraud, V., Magro, P., Nougarede, S., Maza, E., Samson, A., Geffroy, O., & Chervin, C. (2022). Development of the Adapted Pivot Test method for descriptive sensory analyses with young untrained students. Journal of Sensory Studies, e12779. https://doi.org/10.1111/joss.12779
• Baerenzung dit Baron, T. B., Yobrégat, O., Jacques, A., Simon, V., & Geffroy, O. (2022). A novel approach to discriminate the volatilome of Vitis vinifera berries by Selected Ion Flow Tube Mass Spectrometry analysis and chemometrics. Food Research International, 111434.
• Pascotto, K., Leriche, C., Caillé, S., Violleau, F., Boulet, J. C., Geffroy, O., Levasseur-Garcia, C., & Cheynier, V. (2021). Study of the relationship between red wine colloidal fraction and astringency by asymmetrical flow field-flow fractionation coupled with multi-detection. Food Chemistry, 361, 30104.
• Pasquier, G., Feilhes, C., Dufourcq, T., & Geffroy, O. (2021). Potential contribution of climate change to the protein haze of white wines from the French southwest region. Foods, 10(6), 1355.
• Geffroy, O., Armario, M., Fontaine, A., Fourure, M., Pasquier, G., Semadeni, T., & Chervin, C. (2020). 3-isobutyl-2-methoxypyrazine is neutrally perceived by consumers at usual concentrations in French Sauvignon and Fer wines from the Gaillac area. OENO One, 54(4), 1133–1142.
• van Leeuwen, C., Barbe, J.C., Darriet, P., Geffroy, O., Gomès, E, Guillaumie, S.,& Thibon, C. (2020). Recent advancements in understanding the terroir effect on aromas in grapes and wines: this article is published in cooperation with the XIIIth International Terroir Congress, November 17–18, 2020, Adelaide, Australia. Guest editors: Cassandra Collins and Roberta de Bei. OENO One, 54(4), 985-1006.
• Geffroy, O., Morère, M., Lopez, R., Pasquier, G., & Condoret, J.S. (2020). Investigating the aroma of Syrah wines from the Northern Rhone Valley using supercritical CO2-dearomatized wine as a matrix for reconstitution studies. Journal of Agricultural and Food Chemistry, 68(41), 11512–11523.

• Plant Physiology, Pathology and Genetics

Joint Head of the Wine Business Management DA (specific area of interest) program