2024-03-28T16:03:01Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/370652021-06-23T11:47:18Zcom_10324_1183com_10324_931com_10324_894col_10324_1396
Combined effects of water status and iron deficiency chlorosis on grape composition in non-irrigated vineyards
González García, María Rosa
Hailemichael, Girma
Martín Peña, Pedro
Catalina Tomás, Álvaro
Clorofila
Sequía
Chlorophyll
Drought
Producción Científica
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.
Ministerio de Economía, Industria y Competitividad (Project RTA2014- 00077-C02-02)
Junta de Castilla y León (programa de apoyo a proyectos de investigación - Ref. Project VA013P17)
2019-07-16T11:46:45Z
2019-07-16T11:46:45Z
2019
info:eu-repo/semantics/article
info:eu-repo/semantics/draft
https://doi.org/10.1590/1678-992x-2018-0084
Scientia Agricola, 2019, vol.76 no.6
1678-992X
http://uvadoc.uva.es/handle/10324/37065
473
6
480
Scientia Agricola
76
1678-992X
eng
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001600473&tlng=en
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
application/pdf
Universidade de São Paulo