Vine Waste Valorisation: Integrated Approach for the Prospection of Bioactive Lipophilic Phytochemicals
authors Salvador, AC; Simoes, MMQ; Silva, AMS; Santos, SAO; Rocha, SM; Silvestre, AJD
nationality International
journal INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
author keywords vine wastes; Vitis vinifera L; lipophilic compounds; bioactive phytochemicals; GC-MS; triterpenic compounds
keywords SUPERCRITICAL-FLUID EXTRACTION; GRAPE STALKS; CO2 EXTRACTION; OUTER BARKS; FATTY-ACIDS; L.; ANTIOXIDANT; COMPONENTS; FRACTIONS; RESIDUES
abstract Substantial amounts of vine wastes are produced during vineyard management, and the chemical profiling of high-value lipophilic phytochemicals is becoming crucial in order to find a complementary route towards their integrated valorisation. The prospection of bioactive phytochemicals from unripe grape, vine shoot, vine cane, stalk and leaf dichloromethane extracts was carried out by gas chromatography-mass spectrometry (GC-MS), analysing samples from a mixture of four red Vitis vinifera L. varieties (Baga, Aragonez, agua Santa and Shiraz), collected at Bairrada Appellation, as a representative case study of typical multi-variety Portuguese vineyards. Vine wastes showed distinct amounts of lipophilic extract, ranging from 0.68% (vine canes) to 13.35% (vine leaves) at dry weight (dw). Thirty-three components were identified, including fatty acids and alcohols, sterols and triterpenoids accounting for amounts from 118.9 mg/100 g dw to 1512.0 mg/100 g dw. The integrated study revealed that unripe grape, stalk and leaf dichloromethane extracts stood out as possible sources of triterpenic compounds (103.2 to 653.5 mg/100 g dw), with lupeol, ursolic and oleanolic acids prevailing. Leaf extract is also reported as an undervalued source of alpha -tocopherol, as the major component detected in this matrix (300.5 mg/100 g dw). These exploratory results are a relevant contribution for the exploitation of undervalued vine residues as a source of health-promoting components with the potential to be used as supplements or nutraceutical ingredients.
publisher MDPI
isbn 1422-0067
year published 2019
volume 20
issue 17
digital object identifier (doi) 10.3390/ijms20174239
web of science category Biochemistry & Molecular Biology; Chemistry, Multidisciplinary
subject category Biochemistry & Molecular Biology; Chemistry
unique article identifier WOS:000486888400171
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journal impact factor 4.556
5 year journal impact factor 4.653
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