Effect of in vitro gastrointestinal digestion on the total phenolic contents and antioxidant activity of wild Mediterranean edible plant extracts

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Goncalves, S (Author) Other; Moreira, E (Author) Other; Paula B Andrade (Author) FFUP; Patricia Valentao (Author) FFUP; Romano, A (Author) Other

Journal

The Journal is awaiting validation by the Administrative Services.

Title: EUROPEAN FOOD RESEARCH AND TECHNOLOGY

Vol. 245

Pages: 753-762

ISSN: 1438-2377

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 12 Citations

Other information

Authenticus ID: P-00P-WCE

DOI: 10.1007/s00217-018-3197-y

Abstract (EN): The recent interest in wild edible plants is associated with their health benefits, which are mainly due to their richness in antioxidant compounds, particularly phenolics. Nevertheless, some of these compounds are metabolized after ingestion, being transformed into metabolites frequently with lower antioxidant activity. The aim of the present study was to evaluate the influence of the digestive process on the total phenolic contents and antioxidant activity of extracts from four wild edible plants used in the Mediterranean diet (Beta maritima L., Plantago major L., Oxalis pes-caprae L. and Scolymus hispanicus L.). HPLC-DAD analysis revealed that S. hispanicus is characterized by the presence of caffeoylquinic acids, dicaffeoylquinic acids and flavonol derivatives, P. major by high amounts of verbascoside, B. maritima possesses 2,4-dihydroxybenzoic acid, 5-O-caffeoylquinic acid, quercetin derivatives and kaempferol-3-O-rutinoside, and O. pes-caprae extract contains hydroxycinnamic acids and flavone derivatives. Total phenolic contents were determined by Folin-Ciocalteu assay, and antioxidant activity by the ABTS, DPPH, ORAC and FRAP assays. Phenolic contents of P. major and S. hispanicus extracts were not affected by digestion, but they significantly decreased in B. maritima after both phases of digestion process and in O. pes-caprae after the gastric phase. The antioxidant activity results varied with the extract and the method used to evaluate the activity. Results showed that P. major extract has the highest total phenolic contents and antioxidant activity, with considerable values even after digestion, reinforcing the health benefits of this species.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10