terclim by ICS banner
IVES 9 IVES Conference Series 9 Radiation-associated effects on regulated deficit irrigation management in grapevine cv. Cabernet Sauvignon

Radiation-associated effects on regulated deficit irrigation management in grapevine cv. Cabernet Sauvignon

Abstract

The main challenge of regulated deficit irrigation (RDI) research is to isolate the factors that come with RDI, the direct effect of plant water status from the indirect ones like increased radiation and temperature changes on the cluster zone. This study aims to isolate the effects of vine water status from the effects of increased radiation on the phenolic composition of grapes subjected to RDI.

A three-year study on an RDI experiment where radiation was controlled was implemented in a commercial vineyard of Cabernet Sauvignon in Chile. Four RDI treatments based on partial evapotranspiration (ET) irrigation were established. Irrigation treatments were 100% ET, 70% ET, 50-100% ET (50% ET before veraison and 100% ET afterward), and 35-100% ET (35% ET before veraison and 100% ET afterward). Radiation in the cluster zone was measured on a weekly basis and shading nets were installed in part of the trial to reduce radiation as soon as the RDI treatment started to increase it. Also, leaf removal was applied to the control treatment to increase radiation at the same levels as RDI treatments. Anthocyanins, Flavan-3-ols, and Flavonols were measured at harvest.

Findings reveal that increased radiation on the control due to leaf removal does not reduce the concentration of flavan-3-ols and the water deficit effect is maintained in shaded vines. Regarding flavonols all of them increased due to radiation in the leaf removal control, some of them maintained the effect RDI in shaded vines like myricetin but others lost their effect like quercetin.

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Sebastián Vargas1*, Álvaro González1, Felipe Laurie2, Samuel Ortega 3

1 Centro de Investigación e Innovación de Viña Concha y Toro, Ruta K-650 km 10 Pencahue, Chile
2 Facultad de Ciencias Agrarias, Universidad de Talca, Campus Lircay, Talca, Chile
3 Centro de Investigación y Transferencia en Riego y Agroclimatología (CITRA), Universidad de Talca, Campus Lircay, 346000 Talca, Chile

Contact the author*

Keywords

deficit irrigation, radiation, phenolics

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Health space in vine spa in the world

This elaboration presents vine spa has precious contribution of social development health and well being in culture of wine regions. The majority of the vine-spas in the world draw raw materials from the vineyard; both for cosmetics treatments and for dishes in their restaurants. Vitis vinifera vine provides fresh grapes for dishes and massages, seeds and oil from the seeds, as well as the leaves, and its extracts, and above all the wine.

Temperature-based phenology modelling for the grapevine 

Historical phenology records have indicated that advances in key developmental stages such as budburst, flowering and veraison are linked to increasing temperature caused by climate change. Using phenological models the timing of grapevine development in response to temperature can be characterized and projected in response to future climate scenarios.
We explore the development and use of grapevine phenological models and highlight several applications of models to characterize the timing of key stages of development of varieties, within and between regions, and the result of projections under different climate change scenarios.

The role of ampelographic collection in genetic improvement of native varieties and the creation new varieties

The available plant diversity is maintained in global genetic collections and germplasm banks. One of the main objectives of the study of the genetic material of vine still conducting research to characterize the genotypes and the creation of new varieties. The main ampelographic collection of the country, the largest in the Balkans, is located at the Athens Vine Institute in Lykovrisi, Attica, in an area of 70 acres. It contains more than 800 varieties, most of which are indigenous. The Institute is conducting research on the genetic improvement of native varieties and the creation new winemaking and table grape varieties of high productivity, grape quality, resistance to fungal diseases and their adaptability to stresses using the hybridization method using European high-quality varieties.

Application of organic carbon status indicators on vineyard soils: the case study of DOC Piave (Veneto region, Italy)

According to the Kyoto Protocol objectives, it’s necessary to identify alternative carbon dioxide sinks, and vineyard soils could be a significant opportunity.

Contribution of seeds to red wine phenolic composition

Tannin composition is an important attribute in red wine quality, and it is therefore critical to understand the factors influencing tannin extraction during alcoholic fermentation. Tannins contribute to the mouthfeel of wines, but they also form pigmented polymers...