terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Anthocyanin content and composition of Merlot grapes under temperature and late pruning conditions 

Anthocyanin content and composition of Merlot grapes under temperature and late pruning conditions 

Abstract

One of the main aspects of Climate Change is the increase of temperatures during summer and grape maturity period. Physiological processes are influenced by these high temperatures and result in grapes with higher sugar concentration, less acidity and less anthocyanin content among other quality changes. One strategy to deal with the climate change effects is the implementation of late winter pruning to alter the effect of high temperatures during key periods by delays in maturity time. 

A factorial trial was established in a Merlot vineyard of the Maipo Valley in Chile with three pruning times (traditional winter pruning, E-L stage 1; late pruning at bud burst, E-L stage 4; and late pruning at 2-4 cm shoot, E-L 9) and two temperature conditions (ambient or elevated), and three replicates per treatment. HPLC analysis were performed and anthocyanin content and composition were evaluated for each condition. Merlot grapes of any pruning and temperature condition had a predominance of Malvidin type anthocyanins, but total pigments were about 30% less in grapes grown under high temperatures, and most of the decrease was explained by less malvidin-3-glucosides. Late pruning slightly increased glucosilated anthocyanins when fruit maturity was reached under ambient conditions, but when temperature was increased about 1ºC with the OTC only late pruning at budbreak was beneficial, while late pruning at E-L 9 decreased anthocyanin content. Delphinidin and cyanidin glucosides were particularly affected by pruning time and temperature. Most acylated and coumaric forms showed only small changes, but total anthocyanins in a high temperature scenario were improved by a delay in pruning up to budbreak and reduced when pruning was with 2-4 cm shoots.

The results on fruit anthocyanins show the potential benefits of changes in pruning time as a tool to deal with the model temperature increase.

Acknowledgements: Fondecyt 11200703.

DOI:

Publication date: October 11, 2023

Issue: ICGWS 2023

Type: Poster

Authors

M. Cecilia Peppi1*, Carolina Salazar1, Marisol Reyes2

1Instituto de Investigaciones Agropecuarias (INIA) La Platina, Santa Rosa 11610
2Instituto de Investigaciones Agropecuarias (INIA) Raihuén, Esperanza s/n, Estación Villa Alegre. Chile

Contact the author*

Keywords

berry color, climate change, maturity, budbreak, malvidin

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Evaluation of phenology, agronomic and oenological quality in minority wine varieties in Madrid as a strategy for adaptation to climate change

The main phenological stages (budburst, flowering, veraison, and ripeness) and the fruit composition of 34 Spanish minority varieties were studied to determine their cultivation potential and help winegrowers adapt their production systems to climate change conditions. In total, 4 control cultivars, and 30 minority varieties from central Spain were studied during a period of 3 campaigns, in the ampelographic collection “El Encín”, in Alcalá de Henares, Madrid. Agronomic and oenological characteristics such as yield, and total soluble solids concentration have been monitored.

Evaluation of interception traps for capture of Xylotrechus arvicola (Coleoptera: Cerambycidae) in vineyards varieties from Protected Denomination of Origin León

Xylotrechus arvicola (Coleoptera: Cerambycidae) is a pest in vineyards (Vitis vinifera) in the main Spain wine-producing regions with Protected Denomination of Origin (PDO). The action of the larvae, associated to the spreading of wood fungi, causes damage especially in important varieties of V. vinifera. X. arvicola females lay eggs concentrated in cracks or under the rhytidome in the wood vines, which allows the emerging larvae to get into the wood and make galleries inside the plant being then necessary to prune intensively or to pull up the bored plants (1). The objective of the study was to evaluate captures of X. arvicola insects in five varieties of V. vinifera in PDO León.

The colour pattern of flower arrangements influence wine tasters’ sensory description

The arrangements of flowers and wine counterparts are inextricably linked. Whether a fundamental aspect of tablescaping or acolytes to broader entertainment rituals, they have an entangled history since ancient times. The aim of this contribution is to verify the influence of visually delicate and robust flower arrangements on individual description of wines. Changes in the sensory description of wines were investigated during subjects’ (thirty-two participants) exposure to three different conditions: the presence of delicate, robust, or totally absent flower arrangements. In each condition, the same two wines were blind tasted: a wine previously defined as delicate – a Pinot Noir from Australia, and a wine known for its robust character – a Tannat from Uruguay.

Use of UHPH to improve the implantation of non-Saccharomyces yeasts

Ultra High-Pressure Homogenization (UHPH) is a high-pressure pumping at 300 MPa (>200 MPa) with a subsequent depressurization against a highly resistant valve made of tungsten carbide covered by ceramic materials or carbon nanoparticles. The intense impact and shear efforts produce the nano-fragmentation of colloidal biopolymers including the elimination of microorganism (pasteurization or sterilization depending on in-valve temperature) and the inactivation of enzymes.

Water and nutritional savings shape non-structural carbohydrates in grapevine (Vitis vinifera L.) cuttings

Global changes and sustainability challenge researchers in saving water and nutrients. The response of woody crops, which can be forced at facing more drought events during their life, is particularly important. Vitis vinifera can be an important model for its relevance in countries subjected to climate changes and its breeding, requiring cuttings plantation and strong pruning.