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Exploring the effects of geographical origin on the chemical composition and quality grading of Vitis vinifera L. Cv. chardonnay grapes

journal contribution
posted on 27.04.2018, 00:00 by JM Gambetta, Daniel CozzolinoDaniel Cozzolino, SEP Bastian, DW Jeffery
The relationship between berry chemical composition, region of origin and quality grade was investigated for Chardonnay grapes sourced from vineyards located in seven South Australian Geographical Indications (GI). Measurements of basic chemical parameters, amino acids, elements, and free and bound volatiles were conducted for grapes collected during 2015 and 2016. Multiple factor analysis (MFA) was used to determine the sets of data that best discriminated each GI and quality grade. Important components for the discrimination of grapes based on GI were 2-phenylethanol, benzyl alcohol and C6 compounds, as well as Cu, Zn, and Mg, titratable acidity (TA), total soluble solids (TSS), and pH. Discriminant analysis (DA) based on MFA results correctly classified 100% of the samples into GI in 2015 and 2016. Classification according to grade was achieved based on the results for elements such as Cu, Na, Fe, volatiles including C6 and aryl alcohols, hydrolytically-released volatiles such as (Z)-linalool oxide and vitispirane, pH, TSS, alanine and proline. Correct classification through DA according to grade was 100% for both vintages. Significant correlations were observed between climate, GI, grade, and berry composition. Climate influenced the synthesis of free and bound volatiles as well as amino acids, sugars, and acids, as a result of higher temperatures and precipitation. © 2017 by the authors; licensee MDPI, Basel, Switzerland.

Funding

Other

History

Volume

22

Issue

2

Start Page

1

End Page

17

Number of Pages

17

eISSN

1420-3049

ISSN

1420-3049

Publisher

M D P I AG, Switzerland

Additional Rights

© 2017 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Peer Reviewed

Yes

Open Access

Yes

External Author Affiliations

The University of Adelaide

Author Research Institute

Institute for Future Farming Systems

Era Eligible

Yes

Journal

Molecules