terclim by ICS banner
IVES 9 IVES Conference Series 9 GiESCO 9 Timing of leaf removal effects on vitis vinifera L. Cv. Grenache differed on two contrasting seasons

Timing of leaf removal effects on vitis vinifera L. Cv. Grenache differed on two contrasting seasons


Context and purpose of the study – Warming trends over the winegrowing regions lead to an advance of grapevine phenology, diminution of yield and increased sugar content and must pH with a lower polyphenol content, especially anthocyanins. Canopy management practices are applied to control the source sink balance and improve the cluster microclimate to enhance berry composition. We hyphothesized that an early leaf removal might promote a delayed ripening through severe defoliation after fruitset; whereas, a late leaf removal at mid-ripening would reduce sugar accumulation.

Material and methods – The experiment was conducted with Vitis vinifera L. Grenache cultivar over the 2021 and 2022 seasons in a commercial vineyard in Alfaro, La Rioja, Spain. Grapevines were trained in a Globet system with three arms and 5 two-bud spurs. Experimental design was conducted as a complete block design with two leaf removal treatments differing in the moment of manipulation: i) severe leaf removal treatment conducted after fruit set (ELR); and ii) severe leaf removal after veraison (LLR) compared to an untreated control (UNT). Both leaf removal treatments consisted in the elimination of the basal leaves before the second internode. Each treatment had five replicates of 10 grapevines. Harvest commenced when berries reached commercial maturity (approximately, 26°Bx) and yield components were studied. At harvest, sample of berries were collected for berry mass and chemistry, color development and polyphenol profile determinations by UHPLC-MS/MS.


Publication date: July 7, 2023

Issue: GiESCO 2023

Type: Poster


Purificación FERNÁNDEZ-ZURBANO1, Luis Gonzaga SANTESTEBAN2,3, Ana VILLA-LLOP2, Maite LOIDI2, Carlos PEÑALOSA2, Sergio MUSQUIZ2, Nazareth TORRES2,3,*

1Instituto de Ciencias de la Vid y el Vino (CSIC-GR-UR). Department of Enology, Finca La Grajera, Ctra. de Burgos Km. 6 (LO-20 – salida 13), 26007 Logroño, Spain
2Dept. of Agronomy, Biotechnology and Food Science, Public University of Navarre, Campus Arrosadia, 31006 Pamplona, Navarra, Spain
3Institute for Multidisciplinary Research in Applied Biology (IMAB-UPNA), Public University of Navarre, Campus Arrosadia 31006 Pamplona, Spain

Contact the author*


anthocyanins, decoupling, grapevine, polyphenols, warming trends


GiESCO | GIESCO 2023 | IVES Conference Series


Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.