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…

Effect of pH and ethanol on Lactiplantibacillus plantarum in red must fermentation: potential use of wine lees

Wine is the result of the alcoholic fermentation (AF) of grape must. Besides AF, wine can also undergo the malolactic fermentation (MLF) driven out by lactic acid bacteria (LAB). Among LAB, Oenococcus oeni and Lactiplantibacillus plantarum are the dominant species in wine. Even if O. oeni is the most common LAB undergoing MLF in wine, due to its high tolerance to wine conditions, L. plantarum can be used to undergo MLF in must. The moderate tolerance of L. plantarum to low pH and ethanol, may compromise the fermentative process in harsh wines.

Read More

Effects of fast dehydration at low temperature and relative humidity on the phenolic composition of Nebbiolo grapes

Grape postharvest dehydration is a widely used technique for the special wines production, where genetic features, ripeness degree and environmental factors strongly influence the metabolic processes [1].

Read More

Tempranillo in semi-arid tropical climate (Pernambuco-Brazil). Adaptation of some clones and their affinity to different rootstocks

The variety Aragonez (sin. Tempranillo), recently introduced in the San Francisco Valley (9º02′ S; 40º11′ W) has revealed an excellent adaptation, with high potential of quality and yield, even without clonal material.

Read More

Evaluation des aptitudes œnologiques des raisins rouges avec l’étude de certains nouveaux indices de maturité phénolique

Pour obtenir des vins d’une certaine gamme, il faut connaître les paramètres liés à la composition de la baie et introduire non seulement les paramètres classiques, c’est-à-dire sucres et acidité, mais aussi les paramètres qui tiennent compte

Read More

Quantification of polysaccharides of variety Pomaces of the D.O.Ca Rioja

Pomace is one of the main residues generated by the wine industry and represents an environmental problem. Currently, there is a growing interest in the revaluation of these products because different bioactive compounds can be obtained from them, such as polyphenols, grape seed oils and polysaccharides. Red grape pomace can be an important source of polysaccharides, but they are currently little studied and even less with viable and environmental extraction processes (green extraction), such as flash extraction. The residual amount of the fraction rich in pectin (residual pulp) and component rich in hemicellulose in the pomace and the strength of association of the pectin with the cellulose-xyloglucan network depend on the degree of extractability of the polysaccharides in red winemaking and on the winemaking conditions.

Read More