terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Effect of ultraviolet B radiation on pathogenic molds of grapes

Effect of ultraviolet B radiation on pathogenic molds of grapes

Abstract

The fungicidal effect of UV-C radiation (100-280 nm wavelength) is well known, but its applicability for the control of pathogenic molds of grapes is conditioned by its effect on the host and by the risks inherent in its handling[1]

As an alternative, the effect in vitro of UV-B radiation (280-315 nm) on the main pathogenic molds of grapes has been studied: Botrytis cinerea, Aspergillus niger, Penicillium expansum and Rhizopus stolonifer.

The molds studied were seeded on Czapek agar plates (in triplicate) that were irradiated with UV-B radiation lamps located at a height of 25 cm, obtaining an irradiance of 16 Wm-2. Different exposure times (0, 1, 3, 6, 12 and 24 hours) were applied on two series of plates. One of the series was protected from radiation by UV radiation filters and acted as a control. After exposure, the plates were incubated at 20ºC in the darkness, assessing the degree of mold development over two weeks.

UV-B radiation caused a clear inhibitory effect on the development of the molds studied that was proportional to the irradiation dose received. The observed effect was different for each mold, being Rhizopus stolonipher and Botrytis cinerea the most sensitive to UV-B radiation. The resistance of molds to UV-B radiation has been related by different authors with mold pigmentation[2].

These results allow us to contemplate the use of UV-B radiation in the control of pathogenic molds of grapes.

References:

1)  Usall J. et al. (2016) Physical treatments to control postharvest diseases of fresh fruits and vegetables. Post. Biol. Tech., 122: 30-40, DOI 10.1016/j.postharvbio.2016.05.002

2)  García-Cela, M.E. et al. (2016) Conidia survival of Aspergillus section Nigri, Flavi and Circumdati under UV-A and UV-B radiation with cycling temperature/light regime. J. Sci. Food Agric., 96:2249-2256, DOI 10.1002/jsfa.734

DOI:

Publication date: October 6, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Hidalgo-Sanz R., Del-Castillo-Alonso M.A., Sanz S., Olarte C., Martínez-Abaigar J., Núñez-Olivera E.

Faculty of Science and Technology, University of La Rioja. 26006 Logroño (La Rioja), Spain

Contact the author*

Keywords

UVR-B, pathogens molds, grapes

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Cover crop management and termination timing have different effects on the maturation and water potentials of Glera (Vitis vinifera L.) in Friuli-Venezia Giulia

Inter-row soil tillage in vineyards, stimulates vigor and production due to the absence of competition for water and nutrients, however negatively affects organic matter content, soil erosion, and compaction, resulting in reduced fertility. In this study, we investigated the effects of different cover crop management approaches, including cultivation type and termination timing, on the physiological and productive responses of a Glera vineyard.
The experimental trial was conducted in Precenicco (UD) from 2019 to 2021. A commercial mixture for autumn cover cropping was sown in alternating rows, and the sowing pattern was changed each year.

Identification of important genomic regions controlling resistance to biotic and abiotic stresses in Vitis sp. through QTL meta-analysis

In the context of global change, the environmental conditions are expected to be more stressful for viticulture. The choice of the rootstock may play a crucial role to improve the adaptation of viticulture to new biotic and abiotic threats (Ollat et al., 2016). However, the selection of interesting traits in rootstock breeding programs is complex because of the combination of multiple targets in a same ideotype. In this sense, the integration of studies about the genetic architecture for desired biotic and abiotic response traits allow us to identify genomic regions to combine and those with interesting pleiotropic effects.

Study of Spanish wine sensory analysis data over a 3-year period

This study presents an investigation based on sensory analysis data of Spanish wines with geographical indications collected over a three-year period. Sensory analysis plays a crucial role in assessing the quality, characteristics, and perception of wines. The trained tasting panel at Dolmar Laboratory, accredited for objective sensory evaluation of wines since 2016, has been tasting over 5000 wines. However, it is since 2021, when a computer application for tastings was developed, that the digitalization of data allows for detailed statistical analysis of the results.

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.

Green pruning of shoots to force new sprouting of buds, in fruit set and in pea size: vegetative, productive and maturation effects, in cv. Verdejo

The context of climate crisis leads to the acceleration of technological ripening of grapes, with unsuitable loss of acidity, so various vineyard management alternatives are being considered to delay the grape ripening. The delay of the vegetative cycle towards a period of milder temperatures affects ripening, but vine behavior can vary according to the area, conduction, watering, variety, etc. A work is proposed to know the response to the green pruning of shoots, executed in fruit set and in pea size, in cv. Verdejo.