GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2019 9 Effects of early leaf removal on grape quality of Albariño vines subjected to different water regimes

Effects of early leaf removal on grape quality of Albariño vines subjected to different water regimes

Abstract

Context and purpose of the study – The grape quality is affected by the canopy manipulation. Water management is a fundamental tool for controlling reproductive growth and grape quality. Moreover, the overall effect of irrigation might produce changes according to other cultural practices, particularly those associated with leaf removal. The present study aimed to determine the effect of early defoliation on the volatile composition of cv Albariño under different water regimes. 

Material and methods – This work was conducted in 2016 and 2017 growing seasons in an experimental vineyard of Vitis vinifera cv. Albariño located in Galicia (Spain), Denomination of Origin Rías Baixas. 
The early defoliation treatment was applied by leaf removing of the first six basal leaves at before flowering (DF) and compared with an undefoliated control treatment (C). DF and C were applied to vines on different water regime treatments, rainfed (R0) and drip irrigated at 30 % of the reference evapotranspiration (R2). The grapes from each experimental treatment replication were analyzed by chemical (OIV methods) and volatile composition (GC-MS). 

Results – Glucose and fructose (G+F) reached the highest values in R0. Early defoliation (DF) applied in both water regimes (R0 and R2) increased sugars concentration and decreased the malic and tartaric acids. The GC-MS analysis of Albariño musts allowed identifying and quantifying thirty-six volatile compounds belonging to seven families, including higher alcohols C6 compounds, terpenes, C13-norisoprenoids, volatile esters, acetates, volatile acids, volatile phenols and lactones. 
Must volatile composition was affected by the treatments. Early defoliation (DF) induced an increase of total volatile concentration of cv Albariño must independently of water regime. Alcohols and terpenes+C13-norisoprenids were the most affected volatiles, increasing their concentration when early defoliation was applied in both water regimes. However, ethyl esters and C6-compounds concentration only increased when DF was applied in R0.

Download the PDF

DOI:

Publication date: June 18, 2020

Issue: GiESCO 2019

Type: Poster

Authors

Mar Vilanova1, María Fandiño2, José Manuel Mirás-Avalos2, José Javier Cancela2

(1) Spanish National Research Council (MBG-CSIC). El Palacio-Salcedo, 36143, Pontevedra, Spain
(2) GI-1716, Agroforestry Engineering Department, EPSE, Universidad de Santiago de Compostela, 27002 Lugo, Spain

Contact the author

Keywords

Vitis vinifera, defoliation, irrigation, grape chemical composition, volatile composition. 

Tags

GiESCO | GiESCO 2019 | IVES Conference Series

Citation

Related articles…

The state of the climate

The climate has warmed over the past century or more bringing about changes in numerous aspects in both earth and human systems

Read More

Handbook of the charter of the universal holistic metaethics  sustainability 4.1c” for certification and warranty bio-métaétique 4.1c

Defined the new paradigm, the applied philosophy, the methodology, the algorithm of the “Charter for Universal Holistic MetaEthic Sustainability 4.1C17.18”, research has continued to define and write, an
handbook that should be:”Complete Universal Holistic MetaEthics 4.1C of descriptors” of the “Charter for Sustainability Universal Holistic MetaEthic 4.1C17.18” with basic and applicative indexing. In these activities and research we have involved over 3500 Italian and non-Italian people from the research world to simple but educated, enlightened and enlightening citizens and we have analyzed over 180000
entries concerning the descriptors above, which represent the basic “descriptors”.

Read More

Do high temperature extremes impact berry tannin composition?

Flavonoids, including flavonols, anthocyanins, and tannins, are important contributors to grape and wine quality, and their biosynthesis is strongly influenced by bunch microclimate.

Read More

Rootstock differences in soil-water uptake during drying-wetting cycles imaged with 3d electrical resistivity tomography

Limited knowledge has been acquired on grapevine roots and rhizosphere processes because of harder access when compared to aerial parts. There is need for new methods to study root behavior in undisturbed field conditions, and relate these effects on canopy and yield. The aim of this multidisciplinary study was to image and quantify spatial-temporal differences in soil-water uptake by genetically different rootstocks and to assess the response of the canopy during drought and rewetting.

Read More

Under trellis cover crop induces grapevine tolerance to bunch rot

Botrytis bunch rot occurrence is one of the most important limitations for the wine industry in humid environments. A positive correlation between grapevine growth and susceptibility to fungal pathogens has been found. In theory the effect of grapevine vegetative growth on bunch rot expression results from direct effects (cluster architecture, nitrogen status among others) and indirect ones (via microclimate). However, a reduction in bunch rot incidence can be achieved in some circumstances without major vine growth reduction. The present study was aimed to test the general hypothesis that bunch rot susceptibility is affected by vine vigor, but other factors associated with grapevine vegetative expression could be even more relevant.

Read More