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ETAP: Efficiency of transpiration and adaptation of plants to dry climates

Team presentation

Presentation

The ETAP team (Efficiency of Transpiration and Adaptation of Plants to dry climates) aims to identify genetic and agronomic targets to improve water use efficiency in grapevine systems exposed to abiotic stresses.

Genetic variability for tolerance to drought, heat and low nitrogen is analysed at the leaf level through the development of simulation models for transpiration, photosynthesis and plant water status. At the whole-plant level, we develop tools to provide a 3D reconstruction of grapevine for contrasting genotypes and training systems, so as to simulate shoot microclimate and canopy gas exchange through the integration of leaf-based models. We also analyse how heat, nitrogen status and carbon availability affect yield components.

We collaborate with local (UMRs AGAP, BPMP, SPO, SYSTEM et INNOVATION), national (UMR EGFV Bordeaux) and international (University of the Balearic Islands [Spain], University of Lisbon [Portugal], Geisenheim University [Germany], INTA [Argentina]) partners in various projects ranging from the genetics of tolerance traits to the optimisation of training systems.

  • The scientists involved in the team project are
  • 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.