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…

Application of DEXI PM Vigne sustainability tool to the assessment of alternative vineyard protection strategies

Implementing alternative grapevine systems that incorporate sustainable strategies and innovative farming practices is essential. However, we lack tools for measuring the impact of these new practices on the overall sustainability of vineyards. DEXi PM Vigne (Gary et al., 2015) is a tool developed for ex ante assessment of the sustainability of grapevine cropping systems, from the plot to the farm scale. In the present study, we focused on implementing new strategies of integrated crop protection management with limited pesticide use in vineyards.

Read More

Atypical aging and hydric stress: insights on an exceptionally dry year

Atypical aging (ATA) is a white wine fault characterized by the appearance of notes of wet rag, acacia blossoms and naphthalene, along with the vanishing of varietal aromas. 2-aminoacetophenone (AAP) – a degradation compound of indole-3-acetic acid (IAA) – is regarded as the main sensorial and chemical marker responsible for this defect. About the origin of ATA, a stress reaction occurring in the vineyard has been looked as the leading cause of this defect. Agronomic, climatic and pedological factors are the main triggers and among them, drought stress seems to play a crucial role.[1]

Read More

Biodiversity and biocontrol ability of Trichoderma natural populations in soil vineyards from Castilla y León region (Spain)

Trichoderma is a microorganism present in many agricultural soils and some of its species could be used as natural biological control agents. In this work, the presence of natural populations of Trichoderma was estimated in soil vineyard and its biocontrol capacity against Phaeoacremonium minimum, one of the main agent causals of grapevine trunk diseases instead of using pesticides. Moreover, physicochemical variables in soil such as pH, organic matter and nutrients were evaluated to determine a possible correlation to natural populations of Trichoderma.

Read More

Acceptability of canned wines: effect of the level of involvement of consumers and type of wine

In recent years there has been a growing demand for alternative packaging designs in the food industry focused on diminishing the carbon footprint. Despite the environmental advantages of cans versus bottles, the traditional environment of wine has hindered the establishment of less contaminant containers. In this context, the objective of this study was to understand and generate knowledge about consumers´ perception of canned wines in comparison to bottled wines.

Read More

Effect of two water deficit regimes on the agronomic response of 12 grapevine varieties cultivated in a semi-arid climate

The Mediterranean basin is one of the most vulnerable regions to Climate Change effects. According to unanimous forecasts, the vineyards of Castilla-La Mancha will be among the most adversely affected by rising temperatures and water scarcity during the vine’s vegetative period. One potential strategy to mitigate the negative impacts of these changes involves the identification of grapevine varieties with superior water use efficiency, while ensuring satisfactory yields and grape quality.

Read More