OENO IVAS 2019 banner
IVES 9 IVES Conference Series 9 OENO IVAS 9 OENO IVAS 2019 9 Analytical developments from grape to wine, spirits : omics, chemometrics approaches… 9 A new graphical interface as a tool to integrate data from GC-MS and UPLC-MS-QTOF: new compounds related with port wine aging

A new graphical interface as a tool to integrate data from GC-MS and UPLC-MS-QTOF: new compounds related with port wine aging

Abstract

Port wine value is related to its molecular profile resulting from the changes occurring during the ageing period. It is of empirical knowledge that the style is greatly affected by the oxidation regimens, i.e. bottle versus barrel storage. The final quality is rated based on sensory evaluation and the correspondent chemical profile remains largely unknown. This lack of knowledge and understanding significantly limits the ability to improve/drive Port Wine quality and consistency. 

Unravelling the chemical changes, occurring during ageing, that are responsible for the wine flavour, constitutes a critical task when one attempts to address issues related to authenticity and sensory quality. 

It has been demonstrated that some key odorants play a critical role in the perceived oxidized character of wines (1, 2). Nevertheless, the mechanisms for these key odorants formation are not fully understood; only that temperature and mainly oxygen have a synergistic impact on their formation (3). Recently it has been demonstrated that Strecker degradation substrates such as: phenolics, sugars and metals can interact resulting in a unpredictable formation of flavour molecules. 

In order to have an holistic view of the chemical system a pipeline was developed based on UPLS-MS-QTOF and GC-MS data acquisition followed by data fusion. The process is hyphenated with an in-house peak picking interface, coupled with multi- and -univariate statistics to get the most relevant compounds related in this case with Ports stored from 1 to 150 years old. 

In this work the “omics” interface was validated with a set of 37 wines; 42 biomarkers were extracted from GC-MS and 152 from UPLC-MS-QTOF. 

The development of tools such as network reconstruction provided considerable amount of information that contributed to the understanding of the kinetic contexts of the molecules (through ageing time). Clusterization of volatiles and non-volatile compounds brought further new information regarding the interaction between mechanisms and new compounds were identified, such as: SO2-phenolics reactions, phenolics-phenolics , phenolics-aldehydes, amongst other. 

This network-driven approach, integrating data from different equipment’s. has proven to be an useful tool in identifying compounds of interest related to changes occurring during food storage or ageing processes, as well as in better understanding the drivers of quality and authenticity in the final product.

DOI:

Publication date: June 19, 2020

Issue: OENO IVAS 2019

Type: Article

Authors

Ana Rita Monforte, Sara Martins, António César Silva Ferreira

Wageningen University, The Netherlands. Unilever R&D Vlaardingen, 3130 AC Vlaardingen, The Netherlands
Universidade Católica Portuguesa, CBQF – Centro de Biotecnologia e Química Fina. – Laboratório Associado, Escola Superior de Biotecnologia – Rua Arquiteto Lobão Vital, 172 4200-374 Porto

Contact the author

Keywords

data-fusion, Port, ageing, omics 

Tags

IVES Conference Series | OENO IVAS 2019

Citation

Related articles…

Rootstocks of prestigious Bordeaux vineyards: implications on quality and yield

Rootstocks have been used in most of the vineyards for over a century. This may seem to be a long period, but it represents only three successive plantations.

Read More

Testing the pathogen e-learning and field training course on grapevine virus knowledge and management

One of the reasons of the spread of grapevine virus diseases in
vineyards around the world is the lack of knowledge by the main actors of the wine sector. To face this problem, five partners worked together to develop the PAThOGEN project, a training program aimed to improve grapevine virus knowledge and management. The partnership gathers one French technical center (IFV), one Spanish university (USC), one Italian applied research center (CREA), one Spanish foundation
specialized in training and technology transfer (FEUGA) and one Italian SME specialized in the development of informatics tools and in knowledge transfer (HORTA).The objectives of PAThOGEN are: (i) to develop and
maintain a high-quality work-based Vocational and Education Training program, (ii) to improve the skills of professionals of the wine sector.

Read More

Ellagitannin profile of red and white wines aged with oak chips

Wine aging with oak chips is nowadays a common alternative to barrel aging, aiming to improve wine quality through the fast extraction of wood derived compounds. From the pool of wood phenols, ellagitannins have been reported to have the most significant impact on the wine’s organoleptic profile. Their final concentration in wines is influenced by several factors, with toasting level considered as one of the most important.

Read More

Coping with heatwaves: management strategies for berry survival and vineyard resilience

Climate change is leading to an increase in average temperature and in the frequency and severity of heatwaves that is already significantly affecting grapevine phenology and berry composition (Webb et al., 2010). This is compounded by water stress, which is well known to increase the vulnerability of grapevines and berries to heatwaves. In hot climate regions like australia, grape production is only possible due to relatively secure supplies of water for irrigation. However, the upper temperature limits for berry survival of well-watered grapevines remains to be tested.

Read More

Response of different grapevine cultivars to water stress using a hydroscape approach

Viticulture worldwide is currently affected by the effects of climate change. This set of adverse phenomena lead to a deterioration of functional vine mechanisms, affecting growth, physiology and grape ripening, which may cause severe losses with respect to yield and quality. To prevent water stress and other abiotic factors from severely affecting its physiology, the vine’s response is to reduce transpiration and photosynthesis rates. This response varies depending on the cultivar and its ability to adapt to the environment. The hydroscape method is based on the internal regulation of water status in the plant. It has been recently used to classify grapevine genotypes according to their iso/anisohydric behavior when they are subjected to water stress conditions.

Read More