terclim by ICS banner
IVES 9 IVES Conference Series 9 Implementing VIS-NIR spectroscopy as a rapid and non-intrusive technique for assessing anthocyanin and phenolic concentrations in Vitis vinifera L. Grenache whole grape berries

Implementing VIS-NIR spectroscopy as a rapid and non-intrusive technique for assessing anthocyanin and phenolic concentrations in Vitis vinifera L. Grenache whole grape berries

Abstract

Anthocyanins and phenolic compounds play a crucial role in winemaking, contributing to the profile, flavor, color, texture, and stability of wine. Grape clusters, specifically Vitis vinifera L. cv. Grenache, were handpicked from a commercial vineyard sited in Tudelilla, La Rioja, Spain (42°18′ 52.26″, Long. -2°7′ 59.15″, Alt. 582 m) on five distinct dates from veraison to harvest during the 2015 season. Non-contact spectral measurements were conducted on intact grape berries using a VIS-NIR spectrometer operating in the 570 – 1000 nm spectral range under controlled laboratory conditions, positioned at a distance of 25 cm from the berries. The quantification of 16 anthocyanins and phenols in 120 grape clusters was performed using HPLC, established as the reference method for validating the spectral tool. Data exploration and prediction of phenolic concentration in grape berries were conducted through Principal Component Analysis (PCA) and Modified Partial Least Squares (MPLS) regression. The best calibration and cross-validation models were built for total monomeric anthocyanins, nonacylated anthocyanins and cyanidin 3-glucoside with determination coefficients (R2cv values above 0.86, while the standard errors of cross validation (SECV) were 0.058 mg/g, 0.052 mg/g and 0.001 mg/g respectively. Of the other phenolic groups, the model for total flavanol yielded R2cv = 0.66 and SECV = 0.023 mg/g. This technology shows high potential for the selection and classification of berries throughout ripening in the vineyard or upon grape reception at the winery. Its application could help tailoring the oenological fate of grape berries to various wine qualities or styles.

Download the abstract

DOI:

Publication date: June 14, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Juan Fernández-Novales1,2, Ignacio Barrio1,2, Leticia Martínez-Lapuente1,2, Zenaida Guadalupe1,2; María Paz Diago,1,2*

1 Department of Agriculture and Food Science. University of La Rioja. C/Madre de Dios 53. 26007. Logroño, (La Rioja) Spain
2 Institute of Sciences of Vine and Wine (CSIC, University of La Rioja, La Rioja Government) Finca La Grajera. Ctra. de Burgos Km 6. 26007. Logroño. (La Rioja). Spain

Contact the author*

Keywords

Berry ripening, Non-invasive technologies, Anthocyanin, Phenols, Chemometrics

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Viticulture, landscapes and the marketing of our wine

The global wine market is polarising over brands versus origin. Provenance is emerging as a marketing megatrend in many fast moving consumer goods. Origin has always been important in wine but does that mean consumers understand, or care about terroir?

Read More

Vineyard floor management intensity impacts soil health indicators and biodiversity across South Australian viticultural landscapes

Vineyard floors in warm, dry landscapes including those in South Australia, have traditionally been managed using intensive practices such as tillage and herbicides to control weeds and vegetation, thereby limiting competition with grapevines for water and nutrients in order to not compromise yields.

Read More

PHOTO OXIDATION OF LUGANA WINES: INFLUENCE OF YEASTS AND RESIDUAL NITROGEN ON VSCS PROFILE

Lugana wines are made from Turbiana grapes. In recent times, many white and rosé wines are bottled and stored in flint glass bottles because of commercial appeal. However, this practice could worsen the aroma profile of the wine, especially as regards the development of volatile sulfur compounds (VSCs). This study aims to investigate the consequences of exposure to light in flint bottles on VSCs profile of Lugana wines fermented with two different yeasts and with different post-fermentation residual nitrogen.

Read More

Rootstock drought tolerance under dry-farmed conditions in Oregon’s Willamette Valley

Rootstocks are used in vineyards worldwide and have been the focus of many studies. However, rootstock performance varies based on regional climates and soil types. As Oregon experiences warmer seasons and variable precipitation patterns, growers are interested in rootstocks with more drought tolerance than the commonly planted rootstocks: 3309C, Riparia Gloire, and 101-14 Mgt. In Oregon’s Willamette Valley, annual precipitation is typically sufficient to make dry-farming possible and use of irrigation is limited.

Read More

Correlation between stable isotopic composition of the fungus aspergillus niger and its growth substrate and the extracted chitin

Wine is one of the most consumed and appreciated beverages in the world. Due to the growing attention paid to consumer health, there is a continuous search for sustainable alternatives to common additives (such as sulfur dioxide) used to preserve wine. An example is represented by chitosan, the main derivative of chitin, approved for the treatment of must and wine since 2009 by the “international organization of vine and wine” (OIV/OENO 338a/2009) and by the european commission (EC Reg. No. 606/2009).

Read More