Optimising grapevine summer stress responses and hormonal balance by applying kaolin in two Portuguese Demarcated Regions
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Título
Optimising grapevine summer stress responses and hormonal balance by applying kaolin in two Portuguese Demarcated RegionsAutoría
Fecha de publicación
2021-03-01Editor
International Viticulture and Enology Society (IVES)ISSN
2494-1271Cita bibliográfica
Bernardo, S., Dinis, L.-T., Luzio, A. ., Machado, N., Gonçalves, A., Vives-Peris, V., Pitarch-Bielsa, M., López-Climent, M. F., Malheiro, A. C. ., Correia, C., Gómez-Cadenas, A., & Moutinho-Pereira, J. (2021). Optimising grapevine summer stress responses and hormonal balance by applying kaolin in two Portuguese Demarcated Regions. OENO One, 55(1), 207–222. https://doi.org/10.20870/oeno-one.2021.55.1.4502Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://oeno-one.eu/article/view/4502Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
In Mediterranean-like climate areas, field-grown grapevines are typically exposed to severe environmental conditions during the summer season, which can negatively impact the sustainability of viticulture. Despite the ... [+]
In Mediterranean-like climate areas, field-grown grapevines are typically exposed to severe environmental conditions during the summer season, which can negatively impact the sustainability of viticulture. Despite the short-term mitigation strategies available nowadays to cope with climate change, little is known regarding their effectiveness in different demarcated winegrowing regions with differing climate features. Hence, we applied a kaolin suspension (5 %) to Touriga-Franca (TF) and Touriga-Nacional (TN) grapevine varieties located in two Portuguese demarcated regions (Alentejo and Douro) with different mesoclimates to study its effect on the physiological performance, hormonal balance and ABA-related grapevine leaf gene expression during the 2017 and 2018 growing seasons. Data show that 2017 was warmer than 2018 due to the occurrence of two heatwaves in both locations, highlighting the protective effect of kaolin application under severe environmental conditions. In the first study year, at midday, kaolin enhanced water use efficiency (23 % in Douro and 13 % in Alentejo), carbon assimilation rates (PN; 72 % in Douro and 25 % in Alentejo), and the soluble sugar content of grapevine leaves, while decreasing the accumulation of plant growth regulators (ABA, IAA, and SA) during the ripening stage. The results show an up-regulation of ABA biosynthesis-related genes (VvNCED) in TF treated vines from the Douro vineyard mainly in 2017, suggesting an increased stress response under severe summer conditions. Additionally, kaolin triggered the expression of ABA-responsive genes (VvHVA22a and VvSnRK2.6) mainly in TF, indicating different varietal responses to kaolin application under fluctuating periods of summer stress. [-]
Publicado en
OENO One Vol. 55 No. 1 (2021)Datos relacionados
https://oeno-one.eu/article/view/4502/14543Entidad financiadora
FCT (Portuguese Foundation for Science and Technology) | European Union’s Horizon 2020 | Integrative Research in Environment, Agro-Chain, and Technology, operation
Código del proyecto o subvención
FCT/UIDB/04033/2020 | NORTE-01-0145-FEDER-000017
Título del proyecto o subvención
Clim4Vitis project
Derechos de acceso
info:eu-repo/semantics/openAccess
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