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Orientador(es)
Resumo(s)
Natural extracts containing high polyphenolic concentration possess antibacterial, antiparasitic and
fungicidal activities. The present research characterises white grape marc, a winemaking by-product
describing their physicochemical features and antimicrobial capacities. Main components of 2 different
extracts generated were phenolic acids, flavan-3-ols and their gallates, and flavonols and their glycosides.
As a result of this complex composition white grape marc extracts showed pronounced bioactivities with
potential uses in agricultural, pharmaceutical and cosmetic industries, among others. Specifically,
polyphenol compounds were extracted by using hydro-organic solvent mixtures from the by-product of
Albariño white wines (Galicia, NW Spain) production. In the present work the “in vitro” antimicrobial
activity of the bioactive extracts was evaluated using two different hydro-organic mixtures (HOL & HOP).
The microorganisms tested included Gram positive and negative bacteria, two Apicomplexan parasite
species and one Oomycota parasite. Microbial species investigated are causing agents of several human
and animal diseases, such as foodborne illnesses (Bacillus cereus, Eschericha coli, Salmonella enterica),
skin infections (Staphylococcus aureus), mastitis (Streptococcus uberis), parasite infections as Malaria
(Plasmodium falciparum) or Toxoplasmosis (Toxoplasma gondii), and plant infections as "chestnut ink" in
chestnuts or "root rot" in avocado, both diseases caused by Phytophthora cinnamomi. Both extracts verified
activity against all the tested species demonstrating their potentiality to be used for the development of
biocides to control a wide range of pathogenic agents; at the same time that they contribute to winemaking
industry residues valorisation
Descrição
Palavras-chave
Grape marc Natural extract Polyphenols Antiparasitic Antibacterian Winemaking by-products valorisation
Contexto Educativo
Citação
Rama, J.L.R.; Mallo, N.; Biddau, M.; Fernandes, F.; Miguel de T.; Sheiner, L.; Choupina, Altino; Lores, M. (2019). Exploring the powerful phytoarsenal of white grape marc against bacteria and parasites causing significant diseases. In HERAKLION 2019: 7th International Conference on Sustainable Solid Waste Management. Crete Island, Greece
Editora
National Technical University of Athens