terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 High-throughput sequencing analysis based on nematode indices revealed healthier soils of organic vineyards 

High-throughput sequencing analysis based on nematode indices revealed healthier soils of organic vineyards 

Abstract

Proper soil health assessments are crucial for sustainable cropland. Among the widely employed approaches, evaluating nematode community structure is particularly suitable. Traditionally, the taxonomic characterization of soil nematodes has relied on time-consuming morphology-based methods requiring experienced experts. However, molecular tools like high-throughput sequencing have emerged as efficient alternatives. In this study, we performed a metataxonomic analysis of soil samples collected from 57 vineyards in the DOCa Rioja region of Northern Spain, focusing on the impact of organic viticulture and cover cropping compared to integrated pest management (IPM) and tilling practices. Our goal was to investigate the potential benefits of organic viticulture and cover cropping on the quality and biodiversity of vineyard soils. The soil samples were collected to a depth of 20 cm, and the vineyards were categorized based on their pest and soil management strategies. Employing specific primers and following the Illumina amplicon protocol, we conducted sequencing on the Illumina MiSeq platform (2×300 bp). The resulting data underwent bioinformatics analysis utilizing Qiime2 and the SILVA v138.1 database to explore biodiversity measures and differentially abundant taxa. Over 80 taxonomic groups (genus/family) of nematodes were identified and utilized for calculating nematode-based indices using the NINJA platform. Findings showed no significant differences between cover cropping and tilling practices but for pest management. Thus, organic viticulture increased the α-biodiversity of soil nematodes, and nematode-based indices revealed raised environmental disturbance, higher occurrence of plant-parasitic nematodes of adverse implications for crop health, and declined soil food web structure in IPM vineyards. In conclusion, this approach appears well suited to assess vineyard soil health.

DOI:

Publication date: October 3, 2023

Issue: ICGWS 2023

Type: Article

Authors

Rubén Blanco-Pérez1*, María de Toro2, Sara Sánchez-Moreno3, Sergio Álvarez-Ortega4, Alícia Pou1, Raquel Campos-Herrera1

1 Instituto de Ciencias de la Vid y del Vino (CSIC-Univ. de La Rioja-Gobierno de La Rioja), Logroño, Spain.
Centro de Investigación Biomédica de La Rioja (CIBIR), Logroño, Spain.
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA-CSIC), Madrid, Spain.
Universidad Rey Juan Carlos, Madrid, Spain.

Contact the author*

Keywords

bioindicators, cover cropping, DNA-metabarcoding, pest management, tillage

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Biotype diversity within the autochthonous ‘Bobal’ grapevine variety

Bobal is the second most widely grown Spanish red grape variety (54,165 has), mainly cultivated in the Valencian Community and especially, in Utiel-Requena region (about 67% of 34,000 has). In this study, agronomic and enological parameters were determined in 98 biotypes selected during 2018 and 2019 in more than 50 vineyards over 50 years-old in the Utiel-Requena region. Moreover, a multi-criteria approach considering temperature and rainfall (Fig. 1A), among other parameters, was made to establish three different zones within the region (Fig. 1B), where in the future the selected biotypes will evaluated. In fact, in 2020, 4 replicates and 12 vines per biotype were planted in an experimental vineyard to preserve this important intra-cultivar diversity.

Model-assisted analysis of the root traits underlying RSA genotypic diversity in Vitis: a promising approach for rootstock selection?

By dissecting the root system architecture (RSA) into its underpinning components (e.g. root emission, axial growth, radial growth, branching, root direction or tropism) and identifying the relationships between them, functional-structural 3D root models are promising tools for analyzing the diversity and complexity of root system phenotypes with Genotype × Environment interactions. The model parameters are assumed to be synthetic traits, less influenced by the environment, and consequently with less polygenic architectures than the integrative RSA traits they drive. Root models can serve as a basis for in silico development of root system ideotypes by highlighting the developmental processes and parameters that most likely influence RSA fitness.

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.

Genetic study of wild grapevines in La Rioja region

Since the mid-1980s, several surveys have been carried out in La Rioja to search for populations of the sylvestris grapevine subspecies (Vitis vinifera L. subsp. sylvestris Gmelin). The banks of the Ebro River and its tributaries (Alhama, Cidacos, Leza, Iregua, Najerilla, Oja and Tirón rivers), as well as the surrounding vegetation of their valleys have been covered. So far, all the populations found are alluvial, forming part of the riparian vegetation of the Najerilla (the first reported population in La Rioja [1]), Iregua, and the vicinity of Oja valleys.

Typicality of Rioja wines: identification of sensory profiles for the three subregions of DOCa Rioja

Within the DOCa Rioja three main production areas are differentiated: Rioja Alta (RA), Rioja Alavesa (RAv) and Rioja Oriental (RO). They are three diverse territories with particular characteristics that are claimed to give rise to differentiated profiles. The present work aims at evaluating the sensory diversity of young commercial red wines in these three subregions. Therefore 30 young red wines (mainly Tempranillo and vintage 2021), ten from each subregion, were sensory described following a non-verbal free sorting task and a verbal free comment task by 32 well-established Rioja winemakers.