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Sustainable edible coatings enriched with bioactive extracts from exhausted olive pomace, fucus spiralis, and limnospira SP. for the postharvest preservation of strawberries

2025-09-16Research article Open access
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dc.contributor.authorMartins, Valter F. R.
dc.contributor.authorPintado, Manuela
dc.contributor.authorMorais, Rui M. S. C.
dc.contributor.authorMorais, Alcina M. M. B.
dc.date.accessioned2025-10-09T09:43:35Z
dc.date.available2025-10-09T09:43:35Z
dc.date.issued2025-09-16
dc.description.abstractExhausted olive oil pomace (EOP), Fucus spiralis, and Limnospira sp. extracts-rich in bioactives, polysaccharides, or proteins-were incorporated into alginate-based edible coatings and applied to strawberries to evaluate their effects on postharvest quality parameters, including decay, weight loss, color, antioxidant activity, and microbial growth. Among the tested formulations, the EOP-based coating (0.25% bioactive rich-extract) was the most effective, reducing weight loss to approximately 18% after 10 days at 10 degrees C, compared with higher losses in the control and other coatings, while also better preserving color through higher hue and chroma retention. Antioxidant activity, measured by ABTS and DPPH assays, was consistently higher in EOP-coated strawberries, despite a general decline in total phenolic content across treatments. Specifically, ABTS values decreased from 21.43 +/- 0.90 (day 0) to 12.88 +/- 0.39 (day 10) mmol TE/100 mg DW, while DPPH values declined from 10.23 +/- 1.39 (day 0) to 5.96 +/- 1.03 (day 10) mmol TE/100 mg DW. Microbial analyses further showed that the EOP coating strongly inhibited spoilage fungi, yeasts, and bacteria, whereas coatings containing Fucus spiralis or Limnospira sp. extracts (0.25% bioactive rich-extract plus 0.5% polysaccharide- or protein-rich extract) offered only moderate protection and, in some cases, promoted microbial growth. Overall, the EOP coating demonstrated superior performance in maintaining freshness, delaying microbial spoilage, and extending the shelf life of strawberries, highlighting its potential as a sustainable and functional strategy for fruit preservation.eng
dc.identifier.citationMartins, V. F. R., Pintado, M., Morais, R. M. S. C., & Morais, A. M. M. B. (2025). Sustainable edible coatings enriched with bioactive extracts from exhausted olive pomace, fucus spiralis, and limnospira SP. for the postharvest preservation of strawberries. Coatings, 15(9), Article 1085. https://doi.org/10.3390/coatings15091085
dc.identifier.doi10.3390/coatings15091085
dc.identifier.issn2079-6412
dc.identifier.otherdac83878-a4d1-4be6-9de5-014be9704677
dc.identifier.urihttp://hdl.handle.net/10400.14/55173
dc.identifier.wos001579671000001
dc.language.isoeng
dc.peerreviewedyes
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAntimicrobial activity
dc.subjectAntioxidant activity
dc.subjectColor
dc.subjectDecay
dc.subjectEdible coatings
dc.subjectExhausted olive oil pomace
dc.subjectFucus spiralis
dc.subjectLimnospira
dc.subjectTotal phenolic content
dc.subjectWater loss
dc.titleSustainable edible coatings enriched with bioactive extracts from exhausted olive pomace, fucus spiralis, and limnospira SP. for the postharvest preservation of strawberrieseng
dc.typeresearch article
dspace.entity.typePublication
oaire.citation.issue9
oaire.citation.titleCoatings
oaire.citation.volume15
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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