RT info:eu-repo/semantics/article
T1 Aroma composition of Tempranillo grapes as affected by iron deficiency chlorosis and vine water status
A1 Sánchez, Ramón
A1 González García, María Rosa
A1 Vilanova, Mar
A1 Rodríguez Nogales, José Manuel
A1 Martín Peña, Pedro
K1 Clorofila
K1 Sequía
K1 Chlorophyll
K1 Vinos y vinificación - Análisis
K1 Vid - Cultivo
K1 3309.29 Vino
K1 5102.01 Agricultura
AB Water deficit and iron nutritional deficiency (iron chlorosis) are frequent environmental stresses affecting grapevine production in the Mediterranean region. The objectives of this work were (i) to study the combined effects of both stresses on aromatic profile of Tempranillo grapes, occurring simultaneously in the vineyard, and (ii) to evaluate the viability of foliar chlorophyll content at veraison (Chl) to early assess aromatic quality potential of grapes in those conditions. Twenty non-irrigated vineyard subzones (10 m × 10 m each), affected and non-affected by iron chlorosis, were monitored in Ribera del Duero Appellation of Origin (North-Central Spain) during two consecutive seasons. Factorial ANOVA was performed to study the effects of predawn leaf water potential and Chl measured at veraison on the must composition parameters and, specifically, on the concentrations of free and bound aromatic compounds.Water deficit tended to increase color intensity and extractable anthocyanin content of the grapes, whereas the incidence of iron deficiency enhanced total phenolic compound content within subzones with better water status. More water or iron stressed subzones restricted C6-alcohols contents than less stressed subzones. Without significant effects on vine vigor, yield or berry size, the incidence of iron chlorosis increased the concentrations of some specific terpenes, C13-norisoprenoids, volatile acids and volatile phenols. These results showed that low to moderate iron stress can have positive effects on grape aromatic quality, and demonstrated that Chl can be a useful tool in precision viticulture to map the aromatic potential within rainfed vineyards affected by iron chlorosis.
PB Universidade de São Paulo (Brasil)
SN 1678-992X
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/55931
UL https://uvadoc.uva.es/handle/10324/55931
LA eng
NO Scientia Agricola, 2021, Vol. 78, Nº. 2, 11 pp.
NO Producción Científica
DS UVaDOC
RD 24-nov-2024