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

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 fo...

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Detalhes bibliográficos
Autores: 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.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:Argentina
Recursos:Instituto Nacional de Tecnología Agropecuaria
Repositorio:INTA Digital (INTA)
Idioma:inglés
OAI Identifier:oai:localhost:20.500.12123/1915
Acesso em linha: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
Access Level:acceso abierto
Palavra-chave:Riego
Sequía
Vid
Estrés de Sequía
Drought
Irrigation
Grapevines
Drought Stress
Descrição
Resumo: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.

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