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24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

Menu Logo Principal Institut Agro Montpellier LEPSE membre de University of Montpellier Labex AGRO Institut Carnot DigitAg

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ETAP : Efficiency of Transpiration and Adaptation of Plants to dry climates


The ETAP team (Transpiration Efficiency and Plant Adaptation to Dry Climates) seeks to identify genetic and agronomic levers of action that can be used to improve water use efficiency in viticultural systems subject to abiotic constraints.
The genetic variability of tolerance to drought, high temperatures and, more recently, low input levels (nitrogen) is understood in detail at the foliar level via the development and use of simulation models of transpiration, water status in the plant and photosynthetic activity. At the more integrated scale of the whole plant, tools for reconstructing the structure of the vine in 3D for different genotypes and for contrasting pruning and trellising systems are developed. These tools make it possible to simulate the microclimate within the plant and to model gas exchanges in the canopy by integrating the models developed at the leaf scale. Analysis of the establishment of early yield components in response to high temperatures has also been undertaken, with particular emphasis on the role of carbonaceous metabolite availability.
This work is based on joint projects with local (UMRs AGAP, BPMP, SPO, SYSTEM and INNOVATION), national (UMR EGFV Bordeaux) and foreign (University of the Balearic Islands, Spain; University of Lisbon, Portugal; Geisenheim Centre, Germany, INTA, Argentina) partners. Local collaborations with the UMR AGAP make it possible to explore the margins of genetic progress, while collaborations with the UMR System aim to optimise management methods.



thierry simonneau
aude coupel
Alain Deloire


Research Director,

team leader


Research Officer


Research Officer




Research Officer

anne pellegrino
Laurent Torregrosa - web 2020

Florent PANTIN






Romain Boulord
Albasha RAMI


Assistant Engineer


Research Technician


Research Technician


External officer on secondment

Magali POUPARD - 2021
CHIR Laurine
Eva Coindre
Mathilde Millan




Non-permanent Engineer

Laurine CHIR

PhD student


PhD student

Mathilde MILLAN

PhD student



PhD student


PhD student

Significant publications

  • Coupel-Ledru A., Lebon E., Christophe A., Gallo A., Gago P., Pantin F., Doligez A. & Simonneau T. (2016) Reduced nighttime transpiration is a relevant breeding target for high water-use efficiency in grapevine. Proceedings of the National Academy of Sciences, 113, 8963-8968.
  • Coupel-Ledru A., Lebon E., Christophe A., Doligez, A., Cabrera-Bosquet L., Péchier P., Hamard P., This P. & Simonneau T. (2014) Genetic variation in a grapevine progeny (Vitis vinifera L. cvs Grenache × Syrah) reveals inconsistencies between maintenance of daytime leaf water potential and response of transpiration rate under drought. Journal of Experimental Botany, 65, 6205-6218.
  • Prieto J.A., Louarn G., Pena J.P., Ojeda H., Simonneau T. & Lebon E. (2012) A leaf gas exchange model that accounts for intra-canopy variability by considering leaf nitrogen content and local acclimation to radiation in grapevine (Vitis vinifera L.). Plant Cell and Environment, 35, 1313-1328.
  • Marguerit E., Brendel O., Lebon E., Van Leeuwen C. & Ollat N. (2012) Rootstock control of scion transpiration and its acclimation to water deficit are controlled by different genes. New Phytologist, 194, 416-429.
  • Pallas B., Loi C., Christophe A., Cournede P.H. & Lecoeur J. (2011) Comparison of three approaches to model grapevine organogenesis in conditions of fluctuating temperature, solar radiation and soil water content. Annals of Botany, 107, 729-745.
  • Lopez-Lozano R., Baret F., Atauri I.G.D., Lebon E. & Tisseyre B. (2011) 2D approximation of realistic 3D vineyard row canopy representation for light interception (fIPAR) and light intensity distribution on leaves (LIDIL). European Journal of Agronomy, 35, 171-183.
  • Pallas B., Christophe A. & Lecoeur J. (2010) Are the common assimilate pool and trophic relationships appropriate for dealing with the observed plasticity of grapevine development? Annals of Botany, 105, 233-247.
  • Louarn G., Dauzat J., Lecoeur J. & Lebon E. (2008) Influence of trellis system and shoot positioning on light interception and distribution in two grapevine cultivars with different architectures: an original approach based on 3D canopy modelling. Australian Journal of Grape and Wine Research, 14, 143-152

Key facts


Funded projects

Former staff

Bessière Claude, Adjoint Technique

Falcon Mélyne, CDD Assistant Ingénieur

Hamard Philippe, Assistant Ingénieur

Gavanon Freddy, CDD Assistant Ingénieur

Lebon Éric, Ingénieur de Recherche

Leporatti Romain, CDD Assistant Ingénieur

Neveu Joris, CDD

Pechier Philippe, Technicien de la Recherche

Raynaud Lucas, CDD Technicien de la Recherche

Tiffon-Terrade Benjamin, Doctorant

Valle Benoît, Doctorant

Vrignon-Brenas Sylvain, post-doctorant

Westgeest Adriaan, Doctorant