terclim by ICS banner
IVES 9 IVES Conference Series 9 PIWIs’ variation in drought response under semi-controlled conditions 

PIWIs’ variation in drought response under semi-controlled conditions 

Abstract

Grapevine interspecific hybrids (PIWIs, from German “pilzwiderstandsfähige Rebsorten” meaning fungus tolerant grapevine cultivars), offer a promising alternative to traditional cultivars in many wine regions due to their tolerance to certain fungal diseases. This makes them a potential solution for sustainable wine production, particularly under organic systems. Despite extensive research on certain agronomic traits and susceptibility to biotic diseases, such as powdery and downy mildews, the response of these cultivars to abiotic stressors, such as drought, remains unclear. Our study aims to investigate the eco-physiological traits of two commercial PIWI cultivars, Muscaris and Souvignier gris, at the leaf level to evaluate their response to drought stress. We conducted a two-year experiment on potted plants under semi-controlled conditions to eliminate the potential effects of environmental factors. The results of stomatal conductance indicate that Souvignier gris consumes more water than Muscaris. However, under well-watered conditions, Muscaris vines deplete soil water faster and exhibit lower stomatal conductance values than Souvignier gris. Further research is required to address remaining questions about PIWIs’ response to drought, including investigating variations in leaf area or anatomy.

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Lea Linhart1*, Jacopo Innocenti1, Philipp Klumpp1, Astrid Forneck1, José Carlos Herrera1

1 University of Natural Resources and Life Sciences Vienna (BOKU), Institute of Viticulture and Pomology, Department of Crop Sciences, Konrad-Lorenz-Straße 24, 3430 Tulln an der Donau, Austria

Contact the author*

Keywords

grapevine, PIWIs, abiotic stress, drought response, eco-physiology

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Beyond liking scores: the importance of the drinking experience to understand our consumers

The presentation will approach the understanding of wine consumers´ perception based on the experiential model suggested by Warell (2008). In this framework, wine consumption gives rise to a
variety of experiences related to the perception, understanding, and judgment of the product. These
multidimensional facets of the drinking experience can be explored by measuring affective, cognitive,
and sensory responses of consumers, which are shown to be stable regardless of the social context.

Acceptance of fungus-resistant grape varieties from the perspective of producers and consumers in Germany

Fungus-resistant grape varieties (frgv) are an important field of research in viticulture, as they represent a way of reducing the use of copper-containing pesticides and thus minimising the environmental impact. The literature suggests that resistant grape varieties are a promising solution to the problem of using copper-containing pesticides in viticulture and that their quality has improved in recent years. However, there are still challenges in the acceptance and dissemination of FRGV by wine producers and consumers.

Cover crops sown in the inter-rows shape the weed communities in three vineyards across Italy

The use of cover crops (CCs) is widely proposed as an alternative to traditional soil management in vineyards to exploit a wide range of ecosystem services. The presence of a CC in the inter-row space is known to control spontaneous vegetation in vineyards, primarily through the biomass of the sown crop, which competes with other spontaneous species for soil resources.

Fleurtai, Soreli and Tocai Friulano: perspectives for quality integration of wine together with protection of the DOCG Lison Classico appellation

In modern viticulture, sustainability must be considered not only into the winery, but in the vineyard as well, being that with the most attentive interventions in order to protect the environment. In this context, the new “fungi resistant” varieties represent a valid option for reducing the negative environmental impact of agrochemicals used in viticulture, including those ones used in organic farming (given the copper accumulation into soils). Several application studies have demonstrated the enological validity of many resistant varieties, both in price and as a blend. Also, under the production point of view, the feasibility and economical sustainability of the new resistant varieties was verified. The aim of this work was to deepen the knowledge on the organoleptic characteristics of wines obtained from the Fleurtai and Soreli varieties and to compare them with the wine obtained from Tocai Friulano, the mother variety in the area destined for the production of the Lison Classico DOCG appellation. The purpose of the work is then to verify the possibility of introducing resistant varieties into the DOCG while maintaining the wine name of the appellation linked to the territory.

Organic mulches slightly influence wine phenolic composition and sensorial properties

Grapevines have traditionally been grown in semi-arid areas, but viticulture is now compromised by climate change. Therefore, it is necessary to implement environmentally friendly viticulture practices to adapt grapevines to current climatic conditions. In this context, organic mulches offer many benefits, such as reduced soil erosion and increased organic matter, soil water content and crop productivity. However, these practices must not compromise grape and wine quality. Therefore, the objective of this study was to evaluate the effect on wine physicochemical and phenolic composition and sensorial properties of different soil management practices on the vine row. Over four years, five soil treatments were examined in two different vineyards.