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

Themes  Staff  Significant publications  Key facts  Partnership  Funded projects  Former staff

Themes

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, IPSim, SPO, ABSys 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 ABSys aim to optimise management methods.

Staff 

You can find the team's trombinoscope here

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

Partnership

Funded projects

Former staff

Bessière Claude (AT), Delivorias Stathis (post-doctorant), Deloire Alain (Enseignant-chercheur, retraité), Falcon Mélyne (CDD AI), Hamard Philippe (AI, retraité), Gavanon Freddy (CDD AI), Lebon Éric (IR), Leporatti Romain (CDD AI), Millan Mathilde (Doctorante), Neveu Joris (CDD), Pechier Philippe (TR), Magali Poupard (CDD IE), Raynaud Lucas (CDD TR), Tiffon-Terrade Benjamin (Doctorant), Valle Benoît (Doctorant), Vrignon-Brenas Sylvain (post-doctorant), Westgeest Adriaan (Doctorant), Wilhem De Almeida Luciana (Doctorante)