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…

Georgian vitis germplasm: conservation, research and usage

Grapevine Vitis vinifera L. is a leader perennial crops for the Republic of Georgia, the South Caucasus. This is a region where the first wine making practice was initiated 8.000 years ago (McGovern et al. 2017) and a spot of grape domestication. The country of Georgia holds 525 local and more than 60 breeding varieties – they are preserved in 9 field collections inside the country.The list of recommended wine cultivars contains 34 names, including 27 old autochthonous varieties and covering 94% of the country’s vineyards.

Read More

Early detection project – make a GTD infection visible without disease symptoms

The presence of grapevine trunk diseases (GTDs) related pathogens leads to severe economic losses in wine‐growing regions all over the world

Read More

Decline of new vineyards in Southern Spain

In-season vineyard pest management relies on proper timing, selection, and application of products. Most of the research on pest management tends to focus on the influence of regional conditions on these aspects, with an emphasis on product timing and efficacy evaluation. One aspect that is not fully vetted in various vineyard regions is application (sprayer) technology. The purpose of this study was to determine the influence of regional conditions on sprayer performance in commercial wine grape vineyards in eastern Washington.

Read More

Comparative study of qualitative and quantitative characters of grape cultivar ‘Mavrodafni’ (Vitis vinifera L.) grown in different regions of the PDO Mavrodafni Patras

‘Mavrodafni’ (Vitis vinifera L.) is considered one of the oldest grapevine cultivars indigenous to the Greek vineyard, with western Peloponnese being its primary center of cultivation. ‘Renio’ is considered to be either a variant of ‘Mavrodafni’ or an altogether different cultivar. Both ‘Mavrodafni’ and ‘Renio’ can be found in the vineyards of the centers of cultivation, since ‘Renio’ is considered to be more productive compared to ‘Mavrodafni’, and for this reason, it has gradually replaced ‘Mavrodafni’ from cultivation over the course of time. The aim of the present study was to assay the mechanical properties, the polyphenolic content and the antioxidant capacity of skin extracts and must of berries coming from ‘Mavrodafni’ and ‘Renio’, cultivated in the same vineyard as well as in the different regions of cultivation of the PDO Mavrodafni Patras.

Read More

Survey assessing different practices for mechanical winter pruning in Southern France vineyards

Winter pruning is today the longest operation for hand workers in the vineyard. Over the last years, mechanical pruning practices have become popular in southern France vineyards to respond to competitiveness issue especially for the basic and mid-range wine production. Wine farmers have developed different vineyard management techniques associated with mechanical winter pruning. They sought to be precise or not to control the buds number per vine.

Read More