resumo
In this study, the chemical composition and antioxidant profile of five edible macroalgae, Fucus vesiculosus, Palmaria palmata, Porphyra dioica, Ulva rigida, and Gracilaria gracilis, cultivated in fully controlled closed systems, were determined. Protein, carbohydrates, and fat contents ranged between 12.4% and 41.8%, 27.6% and 42.0%, and 0.1% and 3.4%, respectively. The tested seaweeds presented considerable amounts of Ca, Mg, K, Mn, and Fe, which reinforce their favorable nutritional profile. Regarding their polysaccharide composition, Gracilaria gracilis and Porphyra dioica were rich in sugars common to agar-producing red algae, and Fucus vesiculosus was composed mainly of uronic acids, mannose, and fucose, characteristic of alginate and fucoidans, whereas rhamnose and uronic acid, characteristic of ulvans, predominated in Ulva rigida. Comparatively, the brown F. vesiculosus clearly stood out, presenting a high polysaccharide content rich in fucoidans, and higher total phenolic content and antioxidant scavenging activity, determined by DPPH and ABTS. The remarkable potential of these marine macroalgae makes them excellent ingredients for a wide range of health, food, and industrial applications.
palavras-chave
FATTY-ACID-COMPOSITION; CENTRAL WEST-COAST; GREEN MACROALGAE; MOLECULAR-MECHANISMS; BIOACTIVE COMPOUNDS; PALMARIA-PALMATA; HEALTH-BENEFITS; RED SEAWEEDS; EXTRACTION; PROTEIN
categoria
Biochemistry & Molecular Biology; Chemistry
autores
Nova, P; Pimenta-Martins, A; Maricato, E; Nunes, C; Abreu, H; Coimbra, MA; Freitas, AC; Gomes, AM
nossos autores
Cláudia Nunes
Investigador AuxiliarProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
The authors gratefully acknowledge the financial support of "Fundo Europeu de Desenvolvimento Regional" (FEDER) through the research project VALORMAR: Valorizacao Integral dos Recursos Marinhos: Potencial, Inovacao Tecnologica e Novas Aplicacoes (POCI-024517-FEDER) and Paulo Nova's individual FCT PhD research grant (SFRH/BD/05747/2020). We would also like to thank the scientific collaboration under the FCT project UID/Multi/50016/2020 and from FCT/MEC (PIDDAC)-IF/00588/2015 and within the scope of the project CICECO-Aveiro Institute of Materials (UIDB/50011/2020 and LA/P/0006/2020) and LAQV-REQUIMTE (UIDP/50006/2020), financed by national funds through the FCT/MEC (PIDDAC). C.N. thanks national funds (OE) through FCT, I.P., in the scope of the framework contract foreseen in numbers 4, 5, and 6 of Article 23 of the Decree Law 57/2016 of August 29, changed by Law 57/2017 of July 19.