terclim by ICS banner
IVES 9 IVES Conference Series 9 Cumulative effects of repeated drought stress on berry composition, and phenolic profile: Field experiment insights

Cumulative effects of repeated drought stress on berry composition, and phenolic profile: Field experiment insights

Abstract

Drought stress has a profound impact on grapevine productivity and significantly alters key quality-related traits of berries. Although research has been conducted on the effects of individual drought events, there is still a knowledge gap regarding the cumulative consequences of repeated exposure to water scarcity and the influence of the timing of stress imposition. To address this gap, a field experiment was conducted to investigate the impacts of repeated drought stress on yield, berry composition, and the phenolic profile of grape berries. The results indicate that yield is primarily influenced by pre-veraison water deficit. Although the number of clusters was only slightly reduced, a substantial decrease in berry size was observed, resulting in a notable reduction in overall yield. The comparison between sun-exposed and shaded berries revealed an interplay between light exposure and water availability. Furthermore, pre-veraison drought stress resulted in a decrease in titratable acidity, leading to an increase of must pH at harvest time. These results emphasize the impact of early drought events on berry composition, persisting until harvest. This indicates the importance of maintaining optimal water supply during early growing season. The study suggests the potential to conserve water resources by strategically adjusting irrigation intensity during the late growing season.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Patrick Pascal Lehr1*, Charles Obiero2, Markus Keller2, Christian Zörb1

1 University of Hohenheim, Institute of Crop Science, Quality of Plant Products, Stuttgart, Germany
2 Washington State University, Irrigated Agriculture Research and Extension Center, Department of Viticulture and Enology, Prosser, WA, USA

Contact the author*

Keywords

recurrent drought stress, berry quality, phenolic composition, yield, water saving strategies

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Histoire des Vitis depuis leurs origines possibles sur la Pangée jusqu’aux cépages cultivés : un exemple de résilience liée à la biodiversité des espèces

The first forms of life on earth were bacteria and single-celled blue-green algae. They evolved into land plants around 500 million years ago, developing mechanisms for surviving on land, such as roots, stems and leaves. This evolution also led them to coexist with other organisms, such as insects and animals, for pollination and seed dispersal, as well as to resist environmental factors such as drought and disease.

Read More

Leveraging the grapevine drought response to increase vineyard sustainability

In this video recording of the IVES science meeting 2024, Silvina Dayer (PhD in Agronomy, Les Sanctuaires du Mirazur-Groupe Mauro Colagreco, Menton, France) speaks about grapevine drought response to increase vineyard sustainability. This presentation is based on an original article accessible for free on IVES Technical Reviews.

Read More

What drives Indications of Geographical Origin protection and governance mechanisms in the U.S. and European contexts? A contribution of the social sciences

There are fundamentally two different ways in which indications of geographical origin (igos) can be protected. The us approach favors the pre-existing trademark system through collective marks (cms), while the eu approach favors a maximalist approach via a sui generis system which promotes appellations of origin (aos). A consensus however emerges regarding the fundamental protection of origin against misleading, confusing and dilutive uses. Previous literature discusses these competing igo logics from historical, legal and international trade perspectives. In this paper, we depart from the field of social sciences, in particular from recent advancements in the well-established literature on proximities, in order to provide a reflection on the different logics underpinning the aos and cms systems.

Read More

Foliar application of specific inactivated yeast to enhance the varietal aroma precursors accumulation on cv. Traminer

The production of grapes with a balanced composition is one of the main goals that agronomists and oenologists pursue to produce premium quality wines.

Read More

Field-grown Sauvignon Blanc berries react to increased exposure by controlling antioxidant homeostasis and displaying UV acclimation responses that are influenced by the level of ambient light

Leaf removal in the bunch zone is a common viticultural practice with several objectives, yet it has been difficult to conclusively link the physiological mechanism(s) and metabolic berry impact to this widely practiced treatment. We used a field-omics approach1 in a Sauvignon blanc high altitude model vineyard, showing that the early leaf removal in the bunch zone caused quantifiable and stable responses (over years) in the microclimate where the main perturbation was increased exposure. We provide an explanation for how leaf removal leads to the shifts in grape metabolites typically linked to this treatment and confirm anecdotal evidence and previous reports that leaf removal treatment at an early stage of berry development affects “quality-associated” metabolites (monoterpenes and norisoprenoids).

Read More