Autor(es):
Parracho, Tiago ; Cruz, Pedro F. ; Peralta, Claúdia C. ; Silva, Cândida G. ; Campos, Maria Jorge ; Neves, Marta ; Cordeiro, Rachel ; Trindade, Daniela ; Moura, Carla ; Almeida, Zaida L. ; Pereira, Cidália D. ; Guimarães, Carla ; Brito, Rui M. M. ; Guerra, Mauro ; Reboredo, Fernando ; Veríssimo, Paula ; Ribeiro, Vânia ; Vaz, Daniela C.
Data: 2025
Identificador Persistente: http://hdl.handle.net/10362/189906
Origem: Repositório Institucional da UNL
Projeto/bolsa:
info:eu-repo/grantAgreement/FCT/Concurso para Atribuição do Estatuto e Financiamento de Laboratórios Associados (LA)/LA%2FP%2F0069%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50020%2F2020/PT;
info:eu-repo/grantAgreement/FCT/Concurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Programático/UIDP%2F50020%2F2020/PT;
info:eu-repo/grantAgreement/FCT/Concurso para Atribuição do Estatuto e Financiamento de Laboratórios Associados (LA)/LA%2FP%2F0045%2F2020/PT;
info:eu-repo/grantAgreement/FCT/Concurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Base/UIDB%2F00313%2F2020/PT;
info:eu-repo/grantAgreement/FCT/Concurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Programático/UIDP%2F00313%2F2020/PT;
info:eu-repo/grantAgreement/FCT/Concurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Programático/UIDP%2F04292%2F2020/PT;
info:eu-repo/grantAgreement/FCT/Concurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Base/UIDB%2F04292%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04044%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04044%2F2020/PT;
Assunto(s): Alginate-based hydrogels; Antimicrobial activity; Antioxidant capacity; Halophytes; Mineral profile; Phenolic content; Preservation methods; Food Science; Pharmaceutical Science; Nutrition and Dietetics; Gastroenterology
Descrição
Funding Information: Authors thank the financial support of Fundação para a Ciência e a Tecnologia FCT/MCTES to LSRE-LCM (10.54499/UIDB/50020/2020 & 10.54499/UIDP/50020/2020), ALiCE (10.54499/LA/P/0045/2020), CQC-IMS (10.54499/UIDB/00313/2020 & 10.54499/UIDP/00313/2020), MARE (10.54499/UIDP/04292/2020 & 10.54499/UIDB/04292/2020), ARNET (10.54499/LA/P/0069/2020) and CDRSP (10.54499/UIDB/04044/2020 & 10.54499/UIDP/04044/2020). Publisher Copyright: © 2025 The Author(s)
Edible wild plants are part of the ethnobotanic heritage of a certain geographical area and are important sources of essential oils, antioxidants, minerals, and special flavours. Corema album (Portuguese crowberry), Crithmum maritimum (sea fennel), Eryngium maritimum (sea holly), Helichrysum italicum (curry plant) and Otanthus maritimus (cottonweed) wildly flourish along the sandy dunes of the coast of the Iberian Peninsula. These plants are locally known for their beneficial properties, with important value for food, cosmetics and/or medicinal applications. Hence, leaves of these endemic species were collected at four different locations and submitted to different preserving treatments (oven-drying, freezing, and freeze-drying). Acetonic extracts of the different plants submitted to the different post-harvesting treatments were analysed regarding their antioxidant capacities and phenolic contents. Plant extracts were also analysed by diffusion-ordered nuclear magnetic resonance spectroscopy (DOSY-NMR). In general, freeze-drying was the best method of preserving plant minerals, antioxidants (∼4 mgVCEAC/g fw) and polyphenols (∼5 mgGAE/g fw). Minerals were quantified via energy-dispersive X-ray fluorescence spectrometry, and despite their location, all plants were rich in Ca, Cl, K, S and P. Hierarchical clustering and principal component analyses (PCA) pointed towards chemical/metabolic proximity between taxonomic families. Alginate hydrogels loaded with 0.1 % and 0.2 % (w/v) of extracts presented homogenous surface properties by scanning electron microscopy, good mechanical tensile strength (∼30 MPa) and antibacterial activity against S. aureus. Edible alginate hydrogels enriched with plant extracts hold great nutraceutical potential to be used as natural preservatives for food coating and packaging or as sources of bioactive compounds for biomedical applications.
