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…

What to do to solve the riddle of vine rootstock induced drought tolerance

Climate change will increase the frequency of water deficit situation in some European regions, by the increase of the evapotranspiration and the reduction of rainfalls during the growing cycle. This requires finding ways of adaptation, including the use of plant material which is more tolerant to drought. In addition to the varieties used as scions that result in the typicality of wines, rootstocks constitute a relevant way of adaptation to more stressful environmental conditions.

Evaluation of the effects of pruning methodology on the development of young vines 

Grapevine pruning is one of the most important practices in the vineyards. Winegrowers use it to provide the vines the shape needed, or to maintain it once achieved, and also to balance vegetative growth and fruit production. In the last decades, careless pruning has been blamed, among other factors, as responsible of the vineyard decay that is been observed even in young vines. However, to our knowledge, there is a lack of systematic research trying to elucidate to which extent the pruning method used affects plant development or its susceptibility to grapevine trunk diseases (GTD). Within this context, the aim of this work is to study the influence of different pruning method strategies on the development of field-planted young vines.

How are canned wine drinkers perceived? An investigation involving Swiss nationals and different scenarios of outdoor leisure activities

This study examines how people who consume wine in cans are perceived in terms of their basic personality characteristics, helps understand the role of cultural background on people’s perception, and verify the role played by the consumption context on the perception. Our hypothesis is that prejudice and negative attitudes towards wine in cans might exert a negative effect on the evaluation of people who consume canned wine. To evaluate this hypothesis, the consumption of wine in cans was evoked in four different contexts of use during outdoor leisure activity (beach resort, ski resort, desert safari, and party). In order to examine the effect of culture on subject’s response we use participants from Switzerland, a country where three different cultures, associated with three different languages, cohabit.

The characterization of Vitis vinifera L cv. Cabernet sauvignon: the contribution of Ecklonia maxima seaweed extract

Biostimulants and biofertilizers are considered environmentally friendly and cost-effective alternatives to synthetic fertilizers, plant growth regulators and crop improvement products. Broadly, plant biostimulants are expected to improve nutrient use efficiency, tolerance to abiotic stress, quality traits and availability of nutrients in the soil or rhizosphere. Currently, seaweed extracts account for more than 33% of the total plant biostimulant market. Within this category, Ascophyllum nodosum (AN), is the most widely studied and applied in biostimulant formulations.

The surprising role of VvLYK6 in grapevine immune responses triggered by chitin oligomers

For sustainable viticulture, the substitution of chemical inputs with biocontrol products has become one of the most considered strategies. This strategy is based on elicitor-triggered immunity that requires a deep understanding of the molecular mechanisms involved in plant defense activation. Plant immune responses are triggered through the perception of conserved microbe-associated molecular patterns (MAMPs) which are recognized by pattern recognition receptors (PRRs) at the plasma membrane.