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Integrated valorization of fucus spiralis alga: polysaccharides and bioactives for edible films and residues as biostimulants

2024-09-17Journal article Open access
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dc.contributor.authorMartins, Valter F. R.
dc.contributor.authorCoelho, Marta
dc.contributor.authorMachado, Manuela
dc.contributor.authorCosta, Eduardo
dc.contributor.authorGomes, Ana M.
dc.contributor.authorPoças, Fátima
dc.contributor.authorSperotto, Raul A.
dc.contributor.authorRosa-Martínez, Elena
dc.contributor.authorVasconcelos, Marta
dc.contributor.authorPintado, Manuela E.
dc.contributor.authorMorais, Rui M. S. C.
dc.contributor.authorMorais, Alcina M. M. B.
dc.date.accessioned2024-09-25T14:44:23Z
dc.date.available2024-09-25T14:44:23Z
dc.date.issued2024-09-17
dc.description.abstractFucus spp. seaweeds thrive in the cold temperate waters of the northern hemisphere, specifically in the littoral and sublittoral regions along rocky shorelines. Moreover, they are known to be a rich source of bioactive compounds. This study explored the valorization of Fucus spiralis through the extraction of bioactives and polysaccharides (PSs) for food applications and biostimulant use. The bioactives were extracted using microwave hydrodiffusion and gravity (MHG), where the condition of 300 W for 20 min resulted in the highest total phenolic content and antioxidant activity of the extract. Cellular assays confirmed that the extract, at 0.5 mg/mL, was non-cytotoxic to HaCat cells. Polysaccharides (PSs) were extracted from the remaining biomass. The residue from this second extraction contained 1.5% protein and 13.35% carbohydrates. Additionally, the free amino acids and minerals profiles of both solid residues were determined. An edible film was formulated using alginate (2%), PS-rich Fucus spiralis extract (0.5%), and F. spiralis bioactive-rich extract (0.25%). The film demonstrated significant antioxidant properties, with ABTS and DPPH values of 221.460 ± 10.389 and 186.889 ± 36.062 µM TE/mg film, respectively. It also exhibited notable physical characteristics, including high water vapor permeability (11.15 ± 1.55 g.mm.m−2.day−1.kPa−1) and 100% water solubility. The residues from both extractions of Fucus spiralis exhibited biostimulant (BS) effects on seed germination and seedling growth. BSs with PSs enhanced pea germination by 48%, while BSs without PSs increased the root dry weight of rice and tomato by 53% and up to 176%, respectively, as well as the shoot dry weight by up to 38% and up to 74%, respectively. These findings underscore the potential of Fucus spiralis within the framework of a circular economy, wherein both extracted bioactives and post-extraction by-products can be used for sustainable agriculture and food applications.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3390/foods13182938pt_PT
dc.identifier.eid85205034568
dc.identifier.issn2304-8158
dc.identifier.pmid39335867
dc.identifier.urihttp://hdl.handle.net/10400.14/46703
dc.identifier.wos001326314600001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectFucus spiralispt_PT
dc.subjectEdible filmspt_PT
dc.subjectBioactive compoundspt_PT
dc.subjectPolysaccharidespt_PT
dc.subjectTotal phenolic contentpt_PT
dc.subjectAntioxidant activitypt_PT
dc.subjectCytotoxicitypt_PT
dc.subjectBiostimulantpt_PT
dc.subjectGerminationpt_PT
dc.subjectPlant growthpt_PT
dc.titleIntegrated valorization of fucus spiralis alga: polysaccharides and bioactives for edible films and residues as biostimulantspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue18pt_PT
oaire.citation.titleFoodspt_PT
oaire.citation.volume13pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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