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…

Antimicrobial activity of oenological polyphenols against Gram positive and Gram negative intestinal multidrug-resistant bacteria

Bacterial antibiotic resistance is a major current health problem. Polyphenols have demonstrated antibacterial activity, and in this work we studied the effect of oenological polyphenols on the growth of intestinal multidrug-resistant strains of human and animal origin. Two Enterococcus faecium strains, resistant to vancomycin and other antibiotics, and four Escherichia coli strains, resistant to ampicillin and other antibiotics, were included in this study. All strains showed multidrug resistant phenotypes and genotypes to at least two antibiotic families.

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.

Defoliation combined with exogenous ABA application results in slower ripening and improved anthocyanin profile

Reducing sugar accumulation in grape (Vitis vinifera L.) berries may be a way to mitigate the effect of climate change. Managing canopy and crop load is an effective way to do so, however, reducing canopy size has been demonstrated to induce undesirable effects on anthocyanins. The aim of this study was to test if an application of exogenous ABA on the grape berries of defoliated vines (⅔ of the leaves removed) can result in slower sugar accumulation while maintaining grape and wine quality. An experiment with defoliation and exogenous ABA application on directly on clusters (factorial design 2×2) was performed with ‘Tempranillo’ fruit-bearing cuttings.

Metabolomic profiling of heat-stressed grape berries 

The projected rise in mean air temperatures together with the frequency, intensity, and length of heat waves in many wine-growing regions worldwide will deeply impact grape berry development and quality. Several studies have been conducted and a large set of molecular data was produced to better understand the impact of high temperatures on grape berry development and metabolism[1]. According to these data, it is highly likely that the metabolomic dynamics could be strongly modulated by heat stress (HS).

Identification of loci associated with specialised metabolites in Vitis vinifera

Secondary (or specialised) metabolites such as terpenes and phenolic compounds are produced by plants for various roles which include defence against pathogens and herbivores, protection against abiotic stress, and plant signalling. Additionally, these metabolites influence grapevine quality traits such as colour, aroma, taste, and nutritional value. However, the biosynthesis of these metabolites is often complex and controlled by multiple genes which in grapevine are predominantly uncharacterised.