terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Effects of long-term drought stress on soil microbial communities from a Syrah cultivar vineyard

Effects of long-term drought stress on soil microbial communities from a Syrah cultivar vineyard

Abstract

Changes in the rainfall and temperature patterns affect the increase of drought periods becoming one of the major constraints to assure agricultural and crop resilience in the Mediterranean regions. Beside the adaptation of agricultural practices, also the microbial compartment associated to plants should be considered in the crop management. It is known that the microbial community change according to several factors such as soil composition, agricultural management system, plant variety and rootstock. Considering the increasing pressure of the biotic and abiotic stresses, it is utmost necessary to also evaluate the effects of drought on the microbiome associated to grapevine in a sensitive Mediterranean region (Alentejo – Portugal).

In this study we characterize the diversity and the structure of the soil microbial community of the drought tolerant Syrah cultivar under long-term irrigation experiment (five years) with three levels (100% ETc – FI; 50% ETc – DI; rain-fed – NI). Metabarcoding of bacteria (16S rRNA subregion) and fungi (ITS region) was applied on the same soil samples. Also soil chemical analysis are being integrated with genomic data.

Although the richness and evenness indexes for alpha diversity did not show strong differences among the irrigation strategies for neither of the targeted microorganisms, beta diversity revealed statistically supported community differentiation. Across all samples the top three bacterial phyla were Pseudomonadota, Actinobacteriota, and Bacteroidota with a total relative abundance of 60%. Regarding the most represented bacterial species across samples, Gaiella occulta, an uncultured actinobacteria first described in deep mineral waters in Portugal, is shown with prevalence in DI samples with more than 10% of total ASVs.

Next, we will predict communities functionalities, bacterial networks, according to soil chemistry data and compare them with the soils’ samples obtained in July 2023.

DOI:

Publication date: October 11, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Gianmaria Califano1,2*, Júlio Maciel1Olfa Zarrouk3,4, Miguel Damásio5, Jose Silvestre5, Ana Margarida Fortes1,2

1Faculdade de Ciências, University of Lisbon, Portugal
2BioISI, Faculdade de Ciências, University of Lisbon, Portugal
3LEAF – Linking Landscape, Environment, Agriculture and Food Research Centre, Associate Laboratory TERRA, ISA-ULisboa, Lisboa, Portugal
4COLAB, Torres Vedras, Portugal
5INIAV, Polo de Dois Portos, Portugal

Contact the author*

Keywords

soil microbiome, metabarcoding, grapevine, Syrah, drought, crop sustainability

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

The environmental footprint of selected vineyard management practices: A case study from Logroño (La Rioja) Spain

Viticulture is globally important for socioeconomic and environmental reasons. The EU is globally leading grape and wine production, and Spain is among the top grape and wine producers. As climate change affects viticulture, mitigation and adaptation are crucial for protecting grape production. In this research work, data on viticultural management practices such as soil cultivation, irrigation, energy, machinery, plant protection and the use of fertilizers from vineyards located in Logroño (La Rioja) have been obtained.

Oxidability of wines made from Spanish minority grape varieties

The phenolic profile of a wine plays an essential role in its oxidative capacity and in both white and red wines it defines its shelf life[1]. The study of minority varieties to produce wines with peculiar characteristics necessarily includes the phenolic and oxidative characterization of the wines produced. This paper presents the study of wines made from 24 minority and majority white and red grape varieties, focusing on phenolic characteristics (total phenols, slightly polymerized phenols, highly polymerized phenols, anthocyanins…), color, as well as parameters related to the oxidability of the wines and their capacity to consume oxygen [2].

The colour pattern of flower arrangements influence wine tasters’ sensory description

The arrangements of flowers and wine counterparts are inextricably linked. Whether a fundamental aspect of tablescaping or acolytes to broader entertainment rituals, they have an entangled history since ancient times. The aim of this contribution is to verify the influence of visually delicate and robust flower arrangements on individual description of wines. Changes in the sensory description of wines were investigated during subjects’ (thirty-two participants) exposure to three different conditions: the presence of delicate, robust, or totally absent flower arrangements. In each condition, the same two wines were blind tasted: a wine previously defined as delicate – a Pinot Noir from Australia, and a wine known for its robust character – a Tannat from Uruguay.

Metabolomic insights into wine’s sensory identity: unveiling climate-driven changes in aroma composition

Wine, a sensitive and intricate agricultural product, is being affected by climate change, which accelerates grapevine phenological stages and alters grape composition and ripening. This influences the synthesis of key aroma compounds, shaping wine’s sensory attributes [1]. The complex aroma profile, resulting from compound interactions, presents a metabolomics challenge to identify these indicators and their environmental change responses, which is being addressed using diverse analytical techniques.

Sensory profile of wines obtained from disease-resistant varieties in La Rioja

The European wine industry is facing multiple challenges derived from climate change and the pressure of different fungal diseases that are compromising the production of traditional varieties. A sustainable alternative maybe the adoption of resistant varieties.
In this study, we have evaluated the enological potential of 9 resistant varieties (5 white and 4 red varieties) in La Rioja. Microvinifications were carried out with three biological replications. Oenological parameters were very diverse with acid content varying from 2.6 g/L to 6.6 g/L.