RT info:eu-repo/semantics/article
T1 Combined effects of water status and iron deficiency chlorosis on grape composition in non-irrigated vineyards
A1 González García, María Rosa
A1 Hailemichael, Girma
A1 Martín Peña, Pedro
A1 Catalina Tomás, Álvaro
K1 Clorofila
K1 Sequía
K1 Chlorophyll
K1 Drought
AB Although water deficit and iron deficiency chlorosis are common environmental stresses in the Mediterranean area, few data are reported in the literature on their effects on vineyards, when acting simultaneously. The main objective of this research was to study the combined effects of iron deficiency and water status on vigor, yield and fruit composition in rainfed vineyards. Moreover, the investigation aimed to evaluate the feasibility of using foliar chlorophyll content (Chl) and predawn leaf water potential (LWP), measured at veraison, to assess potential quality of grapes in the framework of precision viticulture. For this, 24 non-irrigated ‘Tempranillo’ vineyard subzones were monitored in Ribera del Duero (North-Central Spain) during three consecutive seasons (2011-2013). The analysis of variance and principal component analysis showed that malic acid concentrations of the must were impacted only by Chl, whereas total soluble solids and total acidity were mainly modified by LWP. Both water and iron status reduced yield and berry weight and had additive effects on extractable anthocyanin content in grapes, total polyphenol index and color density of the must. In all seasons, the ratio Chl/LWP had a better predicting value for quality parameters of these grapes than leaf area index, Chl or LWP individually. The present work demonstrates the potential interest of physiological indexes combining water status and foliar chlorosis as indicators of grape phenolic potential in rainfed vineyards affected by iron deficiency.
PB Universidade de São Paulo
SN 1678-992X
YR 2019
FD 2019
LK http://uvadoc.uva.es/handle/10324/37065
UL http://uvadoc.uva.es/handle/10324/37065
LA eng
NO Scientia Agricola, 2019, vol.76 no.6
NO Producción Científica
DS UVaDOC
RD 23-abr-2024