Autohydrolysis Application on Vine Shoots and Grape Stalks to Obtain Extracts Enriched in Xylo-Oligosaccharides and Phenolic Compounds

Author:

Difonzo Graziana1ORCID,Troilo Marica1,Casiello Michele2ORCID,D’Accolti Lucia2ORCID,Caponio Francesco1ORCID

Affiliation:

1. Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, Via Amendola165, 70126 Bari, Italy

2. Chemistry Department, University of Bari Aldo Moro, Via Orabona 4, 70125 Bari, Italy

Abstract

Agronomic practices and the winemaking process lead to the production of considerable quantities of waste and by-products. These are often considered waste with negative effects on environmental sustainability. However, vine shoots and grape stalks can be reused, representing a potential source of xylo-oligosaccharides and polyphenols. In this context, the purpose of this work was to obtain enriched extracts using three different autohydrolysis treatments with (i) H2O, (ii) H2O:EtOH, and (iii) H2O:Amberlyst. The obtained extracts were characterized by their xylo-oligosaccharide and polyphenol profiles using LC-MS techniques. The use of ethanol during autohydrolysis allowed for greater extraction of xylan-class compounds, especially in vine shoot samples, while an increase in antioxidant activity (128.04 and 425.66 µmol TE/g for ABTS and DPPH, respectively) and in total phenol content (90.92 mg GAE/g) was obtained for grape stalks.

Funder

Ministero dell’Istruzione, dell’Università e della Ricerca-Programmi di Ricerca

GOOD-BY-WASTE. Obtain GOOD products-exploit BY-products-reduce WASTE

Publisher

MDPI AG

Subject

Chemistry (miscellaneous),Analytical Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Molecular Medicine,Drug Discovery,Pharmaceutical Science

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