Macrowine 2021
IVES 9 IVES Conference Series 9 LC-MS based metabolomics discriminates premium from varietal chilean Cabernet Sauvignon cv. Wines

LC-MS based metabolomics discriminates premium from varietal chilean Cabernet Sauvignon cv. Wines

Abstract

Aim of the study was to investigate the metabolomic differences between Chilean Cabernet Sauvignon wines, divided according to their quality in two main groups: “Varietal” and “Premium”, and to point out metabolites tentative markers of their chemical signature and sensorial quality. Initially, 150 (50 x 3 biological replicates) experimental wines were produced by the same semi-industrial process, which covered 8 different Chilean valleys. The wine classification made by experts, divided the wines into two major groups (“Varietal” and “Premium”) and four subgroups (two for each major group). All the samples were analyzed according to a robust LC-MS based untargeted work-flow (Arapitsas et al 2018), and the proposed minimum reporting standards for chemical analysis of the Metabolomics Standards Initiative (Sumner et al 2007). The produced big-dataset was based on 7633 features for ESI- mode analysis and 9258 for ESI+ mode. After the quality control of the data, were found 150 tentative markers. The annotation of the markers was achieved by using the internal library, external databases and literature information. Between the Chilean Cabernet Sauvignon quality tentative markers were annotated N-compounds (e.g. peptides), stilbenoids, flavanols, anthocyanins and sulfonated compounds. In conclusion, this study allowed us to find metabolomic pathways and chemical reactions, and therefore propose new hypothesis, which could open new frontiers for the understanding of the Chilean Cabernet Sauvignon quality and terroir effect and provide new tools for the enology of precision in Chile.

DOI:

Publication date: September 24, 2021

Issue: Macrowine 2021

Type: Article

Authors

Vania Sáez,  Álvaro González, Panagiotis Arapitsas. 

Fondazione Edmund Mach.,Doreen Schober. Center for Research, and Innovation, Chile.  Fondazione Edmund Mach, Italy.

Contact the author

Keywords

cabernet sauvignon; quality; metabolomics; stilbenoids; anthocyanins; peptides; terroir

Citation

Related articles…

Field-grown Sauvignon Blanc berries react to increased exposure by controlling antioxidant homeostasis and displaying UV acclimation responses that are influenced by the level of ambient light

Leaf removal in the bunch zone is a common viticultural practice with several objectives, yet it has been difficult to conclusively link the physiological mechanism(s) and metabolic berry impact to this widely practiced treatment. We used a field-omics approach1 in a Sauvignon blanc high altitude model vineyard, showing that the early leaf removal in the bunch zone caused quantifiable and stable responses (over years) in the microclimate where the main perturbation was increased exposure. We provide an explanation for how leaf removal leads to the shifts in grape metabolites typically linked to this treatment and confirm anecdotal evidence and previous reports that leaf removal treatment at an early stage of berry development affects “quality-associated” metabolites (monoterpenes and norisoprenoids).

Read More

Seed phenolics oxidation: development of a new ripening index 

During ripening seed tannins evolve, as demonstrated by the taste and color changes. In this work we tried to develop an objective, easy and fast index, useful for winemakers. In this direction we propose two different spectrophotometric indexes, one related to the molecular structure and tannin subunits linkages, and the other related to the antioxidant properties. Especially the second one gave very interesting and unexpected results.

Read More

Understanding wine as a sensory, emotional, and cognitive experience to promote and communicate conscious consumption

In the complex scenario that the wine industry and its promotion are currently facing, this research proposes a theoretical expansion of the traditional model used to understand the wine experience, namely the classic sensory, emotional and cognitive triad, moving toward a multidimensional approach that also incorporates cultural, symbolic and contextual dimensions in order to comprehend the conscious experience.

Read More

Sensory evaluation of the effect of anthocyanins on in-mouth perceptions

In this audio recording of the IVES science meeting 2022, Maria Paissoni (Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Alba, Italy) speaks about sensory evaluation of the effect of anthocyanins on in-mouth perceptions. This presentation is based on an original article accessible for free on OENO One.

Read More

USDA national grapevine germplasm resources: new curators, new directions

The National Plant Germplasm System (NPGS) in the United States Department of Agriculture safeguards numerous species. Grapevines are split in two locations: Davis, CA and Geneva, NY. The two germplasms maintain 43 Vitis species with over 4500 genetically unique accessions.

Read More