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Article

Screening of Bioactive Properties in Brown Algae from the Northwest Iberian Peninsula

1
Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, University of Vigo, Ourense Campus, E32004 Ourense, Spain
2
REQUIMTE/LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr António Bernardino de Almeida 431, 4200-072 Porto, Portugal
3
Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal
4
CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editors: Alberto Cepeda Sáez and Alejandra Cardelle Cobas
Foods 2021, 10(8), 1915; https://doi.org/10.3390/foods10081915
Received: 12 July 2021 / Revised: 11 August 2021 / Accepted: 12 August 2021 / Published: 18 August 2021
(This article belongs to the Special Issue Food Ingredients and Gut Microbiota)
Algae are an underexploited source of natural bioactive compounds in Western countries, so an increasing interest in the valorization of these marine organisms has emerged in recent years. In this work, the effect of extracting solvent on the extraction yield, phenolic content, antioxidant capacity, and antimicrobial activity of nine brown macroalgae species (Ascophyllum nodosum, Himanthalia elongata, Undaria pinnatifida, Pelvetia canaliculata, Saccharina latissima, Bifurcaria bifurcata, Laminaria ochroleuca, Sargassum muticum, and Fucus spiralis) was assessed. Total phenolic content (TPC) and the antioxidant properties of extracts by different assays: radical scavenging activity (DPPH-RSA) and ferric reducing antioxidant power (FRAP) were performed. The antimicrobial activity of extracts was studied against six different foodborne microorganisms: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus cereus, Escherichia coli, Salmonella enteritidis, and Pseudomonas aeruginosa. The highest extraction yield was achieved in ethanolic extracts. However, the highest TPC and FRAP values were obtained on the ethyl acetate extracts, especially from A. nodosum. Concerning algal species, the highest TPC and FRAP values were found in A. nodosum, while the highest DPPH-RSA values were achieved in the hexane extracts of B. bifurcata. The antimicrobial activity of algal extracts varied according to the solvent and alga selected, suggesting the species- and solvent-dependent behavior of this property, with B. bifurcata extracts showing the highest results for a wide range of bacteria. Our results provide insight on the characterization of widespread brown algae in the coasts of the North-Western region of the Iberian Peninsula, reflecting multiple health-enhancing properties which may lead to their exploitation in food, pharmacological, and cosmetic industries. View Full-Text
Keywords: macroalgae; brown algae; phenolic content; antioxidants; bioactive compounds; antimicrobial activity macroalgae; brown algae; phenolic content; antioxidants; bioactive compounds; antimicrobial activity
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MDPI and ACS Style

Silva, A.; Rodrigues, C.; Garcia-Oliveira, P.; Lourenço-Lopes, C.; Silva, S.A.; Garcia-Perez, P.; Carvalho, A.P.; Domingues, V.F.; Barroso, M.F.; Delerue-Matos, C.; Simal-Gandara, J.; Prieto, M.A. Screening of Bioactive Properties in Brown Algae from the Northwest Iberian Peninsula. Foods 2021, 10, 1915. https://doi.org/10.3390/foods10081915

AMA Style

Silva A, Rodrigues C, Garcia-Oliveira P, Lourenço-Lopes C, Silva SA, Garcia-Perez P, Carvalho AP, Domingues VF, Barroso MF, Delerue-Matos C, Simal-Gandara J, Prieto MA. Screening of Bioactive Properties in Brown Algae from the Northwest Iberian Peninsula. Foods. 2021; 10(8):1915. https://doi.org/10.3390/foods10081915

Chicago/Turabian Style

Silva, Aurora, Carla Rodrigues, Paula Garcia-Oliveira, Catarina Lourenço-Lopes, Sofia A. Silva, Pascual Garcia-Perez, Ana P. Carvalho, Valentina F. Domingues, M. F. Barroso, Cristina Delerue-Matos, Jesus Simal-Gandara, and Miguel A. Prieto. 2021. "Screening of Bioactive Properties in Brown Algae from the Northwest Iberian Peninsula" Foods 10, no. 8: 1915. https://doi.org/10.3390/foods10081915

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