Gregory A Gambetta  - EGFV, Bordeaux-Sciences Agro, INRA, Univ. Bordeaux, ISVV, chemin de Leysotte Villenave d'Ornon, France.
Jose Carlos Herrera  - Institute of Viticulture and Pomology, Department of Crop Sciences, University of Natural Resources and Life Sciences Vienna (BOKU), Tulln, Austria.
Silvina Dayer  - EGFV, Bordeaux-Sciences Agro, INRA, Univ. Bordeaux, ISVV, chemin de Leysotte Villenave d'Ornon, France.
Quishuo Feng  - Wine Research Centre, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC, Canada.
Simone D Castellarin - Wine Research Centre, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC, Canada.

Water availability is arguably the most important environmental factor limiting crop growth and productivity. Erratic precipitation patterns and increased temperatures resulting from climate change will likely make drought events more frequent in many regions, increasing the demand on freshwater resources and creating major challenges for agriculture. Addressing these challenges through increased irrigation is not always a sustainable solution so there is a growing need to identify and/or breed drought tolerance crop varieties in order to maintain sustainability in the context of climate change. Grapes, a major fruit crop of economic importance, have emerged as a model perennial fruit crop for the study of drought tolerance. This review synthesizes the most recent results on grapevine drought responses, the impact of water deficit on fruit yield and composition, and the identification of drought tolerant varieties. Given the existing gaps in our knowledge of the mechanisms underlying grapevine drought responses this review aims to answer the following question: How can we move towards a more integrative definition of grapevine drought tolerance?