IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Volatile analysis of Botrytis contaminated grapes using headspace solid phase microextraction GC-MS

Volatile analysis of Botrytis contaminated grapes using headspace solid phase microextraction GC-MS

Abstract

Grapes infected with grey mould due Botrytis cinerea are widespread in vineyards during certain growing conditions.  Excessive infection levels may lead to decreased yields and the formation of off flavours in wine made from infected grapes. To assist in timely vineyard management that minimises yield and quality losses, decision support tools that correlate early detection of Botrytis infection and quantification of potential off flavour development is desirable.In this study, laboratory infection of whole bunches/ single berries with Botrytis cinerea to create a range of grey mould contamination in Shiraz, Cabernet Sauvignon, Chardonnay and Semillon were undertaken. After SPME GC-MS detection of grape homogenate, 8 out of 22 volatile compounds, including 3-octanol, 3-octanone, 1,5-dimethylnapthalene and 1,5-dimethyltetralin, were identified from VIP score and selectivity ratio, and excellent predictive model of Botrytis cinerea infection levels (determined by ergosterol measurement, antigen capture and qPCR) were developed using PLS and PLS2. These compounds, with high predictive accuracy, could be considered as potential biomarkers for rapid MS techniques in early stage.

DOI:

Publication date: June 24, 2022

Issue: IVAS 2022

Type: Poster

Authors

Jiang Liang1, Qiu Y.1,2, Dumlao M.1,2,3, Donald W. A.4, Steel C. C.1,2 and Schmidtke L. M.1,2,3

1School of Agricultural, Environmental and Veterinary Sciences, Faculty of Science, Charles Sturt University
2Gulbali Institute (Agriculture Water Environment), Charles Sturt University
3The Australian Research Council Training Centre for Innovative Wine Production, University of Adelaide
4School of Chemistry, Faculty of Science, University of New South Wales

Contact the author

Keywords

Grape disease, Grey mould, Botrytis cinerea, SPME GC-MS, Volatile organic compounds

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Techniques of delimitation in France

La pratique de la délimitation des aires des Appellations d’Origine Contrôlées françaises découle de la définition de la notion de terroir en Appellation

Read More

ACCUMULATION OF GRAPE METABOLITES IS DIFFERENTLY IMPACTED BY WATER DEFICIT AT THE BERRY AND PLANT LEVELS IN NEW FUNGUS DISEASE-TOLERANT GENOTYPES

The use of new fungus disease-tolerant varieties is a promising long-term solution to better manage chemical input in viticulture, but unfortunately little is known regarding these new hybrids fruit development and metabolites accumulation in front of abiotic stresses such as water deficit (WD). Thus, prior to the adoption of such varieties by the wine industry in Mediterranean regions, there is a need to consider their suitability to WD.

Read More

Soil survey and continuous classification for terroir delineation in the “Colli Orientali del Friuli” wine production area

The combination of a non-parametric dissimilarity index with auger boring recordings was tested in a project of soil suitability evaluation for quality wine production in a 2000-ha hill slope portion of the “Colli Orientali del Friuli” AOC district (Italy).

Read More

Mathematical modeling of fermentation kinetics: a tool to better understand interactions between Torulaspora delbrueckii and Saccharomyces cerevisiae in mixed cultures

Nowadays the use of Torulaspora delbrueckii is more and more common in winemaking. However, its behavior in presence of Saccharomyces cerevisiae is not always predictable.

Read More

Testing the effectiveness of Cell-Wall material from grape pomace as fining agent for red wines

Lately several works highlighted the capacity of grape cell-wall material (CWM) to interact with proanthocyanidins (PA), indicating its potential use as fining agent for red wines.1–4 However, those studies were performed by using purified PAs and very high doses of CWM (almost ten-fold higher than those used in wine industry for other commercial fining agents). The present study focuses on the applicability of CWM from Cabernet sauvignon pomace as fining agent for red wines under real winery conditions. Grapes of cultivar Cabernet sauvignon were harvested at three different maturity levels
(unripe, mature, and overripe) and used for red winemaking. The pomace of such vinifications were used as source of CWM, and applied into red wines at two different concentrations: 0.2 g/L and 2.5 g/L.

Read More