terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Exploring intra-vineyard variability with sensor- and molecular-based approaches 

Exploring intra-vineyard variability with sensor- and molecular-based approaches 

Abstract

The application of remote and proximal sensing is a fast and efficient method to monitor grapevine vegetative and physiological parameters and is considered valuable to derive information on associated yield and quality traits in the vineyard. Further details can be obtained by the application of molecular analysis at the gene expression level aiming at elucidating how pathways controlling the formation of different grape quality traits are influenced by spatial variability. This work aims at evaluating intra-vineyard variability in grape composition at harvest and at comparing this with remotely sensed canopy vegetation data and molecular-based approaches.

Fourteen spots presenting intra-parcel variability were selected and monitored in a Cabernet Sauvignon vineyard in the Sonoma wine region (CA, USA) during 2017 growing season. The Normalized Difference Vegetation Index (NDVI) was calculated using data acquired by UAV platform equipped with a multispectral camera. The NDVI was then confronted with data obtained from direct measurements on the vines and the berries (e.g., leaf area, yield, and technological berry ripening parameters). Gene expression analysis by microarrays was performed at five time points over berry development spanning from the green to the ripening phase.

Multivariate and correlation analyses were applied to determine the relationship between the vegetation index, the direct vine and berry measurements, and the gene expression information. Spatial variation in berry chemistry (e.g., total anthocyanins) followed a similar pattern to that seen in the vineyard aerial imagery in relation to the vigor zones. On top of this, relevant correlation trends were found also with the expression of the genes related to the berry compounds. Coupling multidisciplinary approaches to map intra-vineyard variability increases the potential of predicting fruit quality and of guiding targeted vineyard management.

DOI:

Publication date: October 5, 2023

Issue: ICGWS 2023

Type: Article

Authors

Ron Shmuleviz*1, Elizabeth Green2, Pietro Previtali2, Nick Dokoozlian2, Giovanni Battista Tornielli1, Marianna Fasoli1

1 Department of Biotechnology, University of Verona, 37134 Verona, Italy
2 E. & J. Gallo Winery, Modesto, CA 95354, USA

Contact the author*

Keywords

berry ripening, vegetation indices; gene expression analysis, sensors, precision viticulture  

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Accumulation of deleterious mutations in grapevine and its relationship with traits of interest for wine production and resilience

Deleterious mutations that severely reduce population fitness are rapidly removed from the gene pool by purifying selection. However, evolutionary drivers such as genetic drift brought about by demographic bottlenecks may comprise its efficacy by allowing deleterious mutations to accumulate, thereby limiting the adaptive potential of populations. Moreover, positive selection can hitchhike mildly deleterious mutations due to linkage caused by lack of recombination. Similarly, in the context of species domestication, artificial selection mimics these evolutionary processes, which can have undesirable consequences for production and resilience. In this study, we evaluated the extent of the accumulation of deleterious mutations and the magnitude of their effects (also known as genetic load) at the whole-genome scale for ca.

Acceptability of canned wines: effect of the level of involvement of consumers and type of wine

In recent years there has been a growing demand for alternative packaging designs in the food industry focused on diminishing the carbon footprint. Despite the environmental advantages of cans versus bottles, the traditional environment of wine has hindered the establishment of less contaminant containers. In this context, the objective of this study was to understand and generate knowledge about consumers´ perception of canned wines in comparison to bottled wines.

Survey of pesticide residues in vineyard soils from the Denomination of Origin Ribeiro

Vineyards from mild temperature, high humidity locations receive often treatments with fungicides to prevent damages produced by fungi responsible for mildium, oidium and botrytis infections. In addition, insecticides are also applied to vineyards to fight again pests, which affect directly, or indirectly (as vectors of different diseases), their productivity. A fraction of the above compounds reaches the soil of vineyards, either during application, or when released from the canopy of vines due to rain-wash-off. Thereafter, depending on soil conditions (pH, organic matter) and environmental variables (regimen of rain, slope of vineyards), they might persist in this compartment, be degraded and/or transferred to water masses, modifying the biodiversity of soils and/or affecting the quality of water reservoirs.

New tool to evaluate color modifications during oxygen consumption in white and red wines

Measuring the effect of oxygen consumption on the color of wines as the level of dissolved oxygen decreases over time is very useful to know how much oxygen a wine can consume without significantly altering its color. The changes produced in wine after being exposed to high oxygen concentrations have been studied by different authors, but in all cases the wine has been analyzed once the oxygen consumption process has been completed. This work presents the results obtained with the use of an equipment designed and made to measure simultaneously the level of dissolved oxygen and the spectrum of the wine, during the oxygen consumption process from saturation levels with air to very low levels, which indicate the total consumption of the dosed oxygen[1,2].

Analysis of volatile composition of interaction between the pathogen E. necator and two grapevine varieties

Volatile organic compounds (VOCs) are emitted by nearly all plant organs of the plants, including leaves. They play a key role in the communication with other organisms, therefore they are involved in plant defence against phytopathogens. In this study VOCs from grapevine leaves of two varieties of Vitis vinifera infected by Erysiphe necator were analysed. The varieties were selected based on their susceptibility to pathogen, Kishmish Vatkana has the Ren1 resistance gene and Zamarrica showed high susceptibility in previous trials.