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 potential of some native varieties of Argentina for the production of sparkling wines. Effect of lees contact time 

Grapevine varieties from South-America, commonly known as criollas, originated because of the natural crossbreeding of grapevine varieties brought by the Spaniards. The objective of this work was to evaluate the potential of some varieties to produce sparkling wines considering the effect of lees contact time. The following varieties were used: Moscatel Rosado, Criolla Chica, Pedro Gimenez, Blanca Oval, Canelón, and the European variety Chardonnay (control), planted in the ampelographic collection of EEA Mendoza INTA (Argentina). Pilot-scale vinifications were carried out to obtain the base wines, in 20 L glass containers. The second fermentation was performed through the traditional method.

Characterization of non-cultivated wild grapevines in Extremadura (Spain) 

Several Eurasian wild grapevine populations were found along Extremadura region (southwestern Spain). For conservation and study, one individual from four different populations (named L1, L2, L5 and L6) was vegetatively propagated and planted at Instituto de Investigaciones Agrarias Finca La Orden (CICYTEX), Badajoz. The aim of the present work was to characterize those conserved individuals from four different populations based on both an ampelographic description and a molecular analysis. Three vines per individual were studied.

Chemical profiling and sensory analysis of wines from resistant hybrid grape cultivars vs conventional wines

Recently, there has been a shift toward sustainable wine production, according to EU policy (F2F and Green Deal), to reduce pesticide usage, improve workplace health and safety, and prevent the impacts of climate change. These trends have gained the interest of consumers and winemakers. The cultivation of disease resistant hybrid grape cultivars (DRHGC), known as ‘PIWI’ grapes can help with these objectives [1]. This study aimed to profile white and red wines produced from DRHGC in South Tyrol (Italy). Wines produced from DRHGCs were compared with conventional wines produced by the same wineries. The measured parameters were residual sugars, organic acids, alcohol content, pigments and other phenolics by LC-QqQ/MS, colorimetric indexes (CIELab); and volatile profiles (HS-SPME-GCxGC-ToF/MS [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.

Chemical and microbiological evaluation of Ribeiro wines (NW Spain)

Wine produced under Designation of Origin (DOP) Ribeiro, the oldest DOP in Galicia (NW Spain), are elaborated using local grape cultivars, grown at the valleys of Miño, Avia and Arnoia rivers. The landscape formed by slopes and terraces and the peculiar climate of continental character, softened by the proximity of Atlantic Ocean, make it an area of excellent aptitude for vine cultivation. In addition, small-scale farming and the use of traditional techniques for vineyard management provide a great diversity to Ribeiro wines. This study presents the evaluation of red and white wines (bottled or bulk wines) from DOP Ribeiro, produced between years 2018-2022.