Vitis vinifera leaves towards bioactivity

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Fatima Fernandes (Autor) Outra; Elsa Ramalhosa (Autor) Outra; Patricia Pires (Autor) Outra; Joao Verdial (Autor) Outra; Patricia Valentao (Autor) FFUP; Paula Andrade (Autor) FFUP; Albino Bento (Autor) Outra; Jose Alberto Pereira (Autor) Outra

Revista

Título: Industrial Crops and Products

Vol. 43

Páginas: 434-440

ISSN: 0926-6690

Editora: Elsevier

Indexação

ISI Web of Knowledge - 35 Citações

Scopus - 62 Citações

Classificação Científica

FOS: Ciências agrárias > Biotecnologia agrária e alimentar

Outras Informações

ID Authenticus: P-001-ZWC

DOI: 10.1016/j.indcrop.2012.07.031

Abstract (EN): The majority of the works about Vitis vinifera L (grape) focus their attention on wine or its major byproduct, the grape pomace. Nevertheless, leaves of V. vinifera also constitute an important matrix of this agro-industry. In this study, the chemical composition and antioxidant potential of V. vinifera leaves from twenty Portuguese varieties (white and red) were evaluated for the first time, concerning their reducing total capacity, reducing power and DPPH radical scavenging capacity. The phenolics present in the aqueous extracts of V. vinifera leaves were trans-caffeoyltartaric and trans-coumaroyltartaric acids, myricetin-3-O-glucoside, quercetin-3-O-glucoside, quercetin-3-O-galactoside and kaempferol-3-O-glucoside, the last two compounds being the most predominant. Despite showing different activities profiles, all samples exhibited antiradical capacity against DPPH radical and reducing power in a concentration-dependent manner, with IC50 values below 800 mu g/mL. The obtained results are encouraging, increasing the possibility of taking profit from the great wastes produced by the grapes processing industry.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7