terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Biodiversity and biocontrol ability of Trichoderma natural populations in soil vineyards from Castilla y León region (Spain)

Biodiversity and biocontrol ability of Trichoderma natural populations in soil vineyards from Castilla y León region (Spain)

Abstract

Trichoderma is a microorganism present in many agricultural soils and some of its species could be used as natural biological control agents. In this work, the presence of natural populations of Trichoderma was estimated in soil vineyard and its biocontrol capacity against Phaeoacremonium minimum, one of the main agent causals of grapevine trunk diseases instead of using pesticides. Moreover, physicochemical variables in soil such as pH, organic matter and nutrients were evaluated to determine a possible correlation to natural populations of Trichoderma.

Ten different plots were selected from Castilla y León region in order to estimate the natural presence of Trichodermain soil vineyards. Samples were collected during winter at 10-30 cm depth. After, the presence of Trichoderma and main physical and chemical characteristics were evaluated in these soils. Moreover, in vitro tests of Trichoderma were done against P. minimum.

This work showed that Trichoderma soil abundance was higher in a vineyard from PDO Bierzo and none Trichoderma was found in 2 vineyards from PDO Ribera del Duero. A Principal Component analysis was performed to evaluate the possible relationship to physicochemical values of soil and presence of Trichoderma. We obtained that extractable iron was positively correlated (p<0.05) to Trichoderma populations in soil and pH was negatively correlated (p<0.05) to the presence of Trichoderma in soil. Also, autochthonous strains showed a significant in vitro biocontrol against the pathogen P. minimum.

These results indicate that populations of Trichoderma in soil could be used as biological control agents in soil and are influenced by abiotic conditions.

Thanks to Pago de Carraovejas winery and the project LOWPHWINE, reference IDI-20210391.

References:

1)  Carro-Huerga. et al. (2023) Vineyard Management and Physicochemical Parameters of Soil Affect Native Trichoderma Populations, Sources of Biocontrol Agents against Phaeoacremonium minimum. Plants 202312(4), 887, https://doi.org/10.3390/plants12040887

DOI:

Publication date: October 9, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Carro-Huerga G.1, Zanfaño L.1, Mayo-Prieto S. 1, Rodríguez-González A. 1, Gutiérrez S. 2, Casquero P.A.1

1Grupo de Investigación de Ingeniería y Agricultura Sostenible. Instituto de Medio Ambiente, Recursos Naturales y Biodiversidad, Universidad de León Av. Portugal 41, 24071 León, España.
2Grupo Universitario de Investigación en Ingeniería y Agricultura Sostenible (GUIIAS), Área de Microbiología, Escuela de Ingeniería Agraria y Forestal, Campus de Ponferrada, Universidad de León, Avenida Astorga s/n, 24400 Ponferrada, Spain

Contact the author*

Keywords

soil, biological control agent, in vitro assays

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

A phylogenomic study reveals the major dissemination routes of ‘Tempranillo Tinto’ in the Iberian Peninsula

‘Tempranillo Tinto’ is a black-berried Iberian cultivar that originated from a hybridization between cvs. ‘Benedicto’ and ‘Albillo Mayor’ [1]. Today, it is the third most widely grown wine grape cultivar worldwide with more than 200,000 hectares of vineyards mostly distributed along the Iberian Peninsula, where it is also known as ‘Cencibel’, ‘Tinta de Toro’, ‘Tinta Roriz’, and ‘Aragonez’, among other synonyms. Here, we quantified the intra-varietal genomic diversity in this cultivar through the study of 35 clones or ancient vines from seven different Iberian wine-making regions. A comparative analysis after Illumina whole-genome sequencing revealed the presence of 1,120 clonal single nucleotide variants (SNVs).

Effect of two water deficit regimes on the agronomic response of 12 grapevine varieties cultivated in a semi-arid climate

The Mediterranean basin is one of the most vulnerable regions to Climate Change effects. According to unanimous forecasts, the vineyards of Castilla-La Mancha will be among the most adversely affected by rising temperatures and water scarcity during the vine’s vegetative period. One potential strategy to mitigate the negative impacts of these changes involves the identification of grapevine varieties with superior water use efficiency, while ensuring satisfactory yields and grape quality.

Wine racking in the winery and the use of inerting gases

The O2 uptake in the different winemaking processes is generally considered to be negative for the sensory characteristics of white and rosé wines. Wine racking is a critical point of O2 uptake, as the large surface area of the wine exposed during this operation and the inability to maintain an effective inert gas blanket over it.
The objective was to study O2 uptake during the racking of a model wine without using inert gases and to compare it with the purging of the destination tank with different inert gases.

Unveiling a hidden link: does time hold the key to altered spectral signatures of grapevines under drought?

Remote sensing technology captures spectral data beyond the visible range, making it useful for monitoring plant stress. Vis-NIR (Visible-Near Infrared) spectroscopy (400-1000 nm) is commonly used to indirectly assess plant status during drought. One example is the widespread use of normalized difference vegetation index (NDVI) that is strongly linked to green biomass. However, a knowledge gap exists regarding the applicability of this method to all the drought conditions and if it is a direct correlation to the water status of the plant.

First results on the chemical composition of red wines from the pressing of marc

In the Bordeaux vineyards, press wine represents approximately 15% of the total volume of wine produced[1]. Valuing this large volume of wine is necessary from an economic point of view, but also because of their organoleptic contribution to the blend, and their contribution to the construction of wines for laying down. Therefore, this study was developed considering the lack of recent scientific knowledge on the composition of red press wines. The aim of this study is to establish an initial assessment of their chemical composition including aromatic compounds and a phenolic part.