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…

Evaluation of Furmint clones in the Tokaj Wine Region

The ’Furmint’ is the most important grape variety in the Tokaj Wine Region, constituting around 65% of its vineyard area. Before the phylloxera disease many types were grown, but as selection started in the 20th century, its diversity dramatically narrowed. As a result, the cultivation of Furmint was based mainly on two heavy-cropping clones, T.85 and T.92 at the end of the ’80s. Aims of present clone research take into account that after solely quantity as target, quality emerged in the 1990’s and most recently, typicity appeared as more private estates began their own selection program.

The performance of grapevines on identified terroirs in Stellenbosch, South Africa

A terroir can be defined as a natural unit that is characterised by a specific agricultural potential, which is imparted by natural environmental features, and is reflected in the characteristics of the final product.

From soil to canopy, the diversity of adaptation strategies  to abiotic constraints in grapevine

Climate change is here. One of the main consequences is an increase in the frequency and severity of abiotic stresses which mostly occur in a combined manner. Grapevine, which grows in a large diversity of pedo-climatic conditions, has presumably evolved different mechanisms to allow this widespread adaptation. Harnessing the genetic diversity in these mechanisms will be central to the future of viticulture in many traditional wine growing areas. The interactions between the scion and the rootstock through grafting add an additional level of diversity and adaptive potential to explore.
At the physiological level, these mechanisms are related to processes such as root system development and functioning (water and nutrient uptake), interactions with the soil microbiome, gas exchange regulation, hydraulic properties along the soil-plant-atmosphere continuum, reserve storage, short and long distance signaling mechanisms and plasticity for some of these traits.

Grapevine sensitivity to fungal diseases: use of a combination of terroir cartography and parcel survey

In front of the economic interest and seeking to respect their environment, the wine growers move gradually towards a policy of reasoning their plant health protection. This is why, starting from epidemiologic studies on grapevine pathogens, forecasting models of the risks are developed by research and experimentation bodies.

Adjustments of water use efficiency by stomatal regulation during drought and recovery of Verona province grape varieties grafted on two different vitis hybrid rootstocks

Drought is considered to be the predominant factor both for determining the geographic distribution of vegetation and for restricting crop yields in agriculture. Furthermore