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…

Bio‐metaethics viticulture proposed by the Giesco. Direct charter with producers. Example of evaluation of training systems

The key points of the current GiESCO charter ‘BIO‐MetaEthics’ are exposed. The new development in cooperation with Giovanni Cargnello is to apply the principles and the content into the practice by establishing a direct contract with producers and other actors of the wine sector. An evaluation sheet is proposed and tested in a new advanced vineyard. For illustrating the methodology of evaluation, the example of the choice of the training systems is detailed on a wide range of situations. 

Read More

Volatile organic compounds investigation in Müller Thurgau wines obtained from vineyard treated with biochar

Volatile Organic Compounds (VOCs) are responsible for the flavor and aroma of a wine. The sensory qualities of the wines depend not only on grape intrinsic characteristics, but also on extrinsic factors including the soil composition. Previous studies have shown that the application of pyrogenic carbon (biochar) can lead to a change in soil parameters. For that reason, one of the goals of the ERDF funded project «WoodUp» is the characterization and reutilization of the locally produced biochar for agricultural purposes.

Read More

Utilization of remote sensing technology to detect riesling vineyard variability

ineyard blocks can vary spatially with respect to several viticulturally significant qualities such as soil variables, vine vigor, vine physiology

Read More

Firmness of the grapes. Mechanical tests and definition of indices. Study of the evolution of berry skin resistance during alcoholic fermentation

The mechanical strength or firmness of a fruit is considered an important parameter to characterize its state of maturity or conservation, as other parameters such as sugar level or color.

Read More

Testing the pathogen e-learning and field training course on grapevine virus knowledge and management

One of the reasons of the spread of grapevine virus diseases in
vineyards around the world is the lack of knowledge by the main actors of the wine sector. To face this problem, five partners worked together to develop the PAThOGEN project, a training program aimed to improve grapevine virus knowledge and management. The partnership gathers one French technical center (IFV), one Spanish university (USC), one Italian applied research center (CREA), one Spanish foundation
specialized in training and technology transfer (FEUGA) and one Italian SME specialized in the development of informatics tools and in knowledge transfer (HORTA).The objectives of PAThOGEN are: (i) to develop and
maintain a high-quality work-based Vocational and Education Training program, (ii) to improve the skills of professionals of the wine sector.

Read More