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Drought will not leave your glass empty : low risk of hydraulic failure revealed by long-term drought observations in world’s top wine regions

Abstract
Grapevines are crops of global economic importance that will face increasing drought stress because many varieties are described as highly sensitive to hydraulic failure as frequency and intensity of summer drought increase. We developed and used novel approaches to define water stress thresholds for preventing hydraulic failure, which were compared to the drought stress experienced over a decade in two of the world’s top wine regions, Napa and Bordeaux. [ver mas...]
Grapevines are crops of global economic importance that will face increasing drought stress because many varieties are described as highly sensitive to hydraulic failure as frequency and intensity of summer drought increase. We developed and used novel approaches to define water stress thresholds for preventing hydraulic failure, which were compared to the drought stress experienced over a decade in two of the world’s top wine regions, Napa and Bordeaux. We identified the physiological thresholds for drought-induced mortality in stems and leaves and found small intervarietal differences. Long-term observations in Napa and Bordeaux revealed that grapevines never reach their lethal water-potential thresholds under seasonal droughts, owing to a vulnerability segmentation promoting petiole embolism and leaf mortality. Our findings will aid farmers in reducing water use without risking grapevine hydraulic integrity. [Cerrar]
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Author
Charrier, Guillaume;   Delzon, Sylvain;   Domec, Jean Christophe;   Zhang, Li;   Delmas, Chloe E. L.;   Merlin, Isabelle;   Corso, Deborah;   King, Andrew;   Ojeda, Hernan;   Ollat, Nathalie;   Prieto, Jorge Alejandro;   Scholach, Thibaut;   Skinner, Paul;   Leeuwen, Cornelis van;   Gambetta, Gregory A.;  
Fuente
Science Advances 4 (1) : eaao6969 (January 2018)
Date
2018
URI
http://hdl.handle.net/20.500.12123/1915
http://advances.sciencemag.org/content/4/1/eaao6969/tab-pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5796794/pdf/aao6969.pdf
DOI
DOI: 10.1126/sciadv.aao6969
Formato
pdf
Tipo de documento
article
Palabras Claves
Riego; Sequía; Drought; Irrigation; Vid; Grapevines; Estrés de Sequía; Drought Stress;
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Excepto donde se diga explicitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
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