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Optimizing germination and cultivation of edible halophytes using effluents from an IMTA system

2025-10-22Journal article Open access
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dc.contributor.authorCastañeda-Loaiza, Viana
dc.contributor.authorRodrigues, Maria João
dc.contributor.authorNeng, Nuno
dc.contributor.authorQuintas, Célia
dc.contributor.authorRatao, Isabel
dc.contributor.authorCustódio, Luísa
dc.date.accessioned2025-11-28T13:10:22Z
dc.date.available2025-11-28T13:10:22Z
dc.date.issued2025-10-22
dc.description.abstractBACKGROUND: Halophytes offer nature-based solutions to food insecurity and soil degradation, while their integration into integrated multi-trophic aquaculture (IMTA) systems promotes circular economy practices. This study aimed to optimize the germination and cultivation of edible halophytic species, namely Limbarda crithmoides, Suaeda vera and Mesembryanthemum nodiflorum, using effluents from an IMTA system. Germination was conducted under different substrates (perlite, vermiculite, coco peat, sand and combinations), irrigation (fresh or brackish water) and seed pre-treatments (scarification, gibberellic acid and thermal shock). Cultivation assays assessed plant responses to salinity (25.5–53.4 dS m−1 ) and density (75–600 plants m−2 ) using IMTA-derived aquaculture effluents for irrigation. RESULTS: Salinity significantly reduced seed germination. Limbarda crithmoides had the highest germination rate (61.1%) in vermiculite under freshwater irrigation, whereas S. vera achieved optimal performance in a substrate of sand, organic peat and perlite. Thermal shock slightly improved M. nodiflorum germination. Moderate salinities (35.1–40.7 dS m−1 ) resulted in higher survival and productivity, particularly for S. vera, which showed >86% survival and higher chlorophyll content. At high densities, L. crithmoides and S. vera maintained >75% survival, while M. nodiflorum at 75 plants m−2 effectively reduced nitrate and ammonia concentrations in effluents. All species produced biomass with adequate nutritional and microbiological profiles suitable for human consumption, rich in protein, dietary fiber and bioactive compounds. Suaeda vera at 300 plants m−2 exhibited the highest total content of phenolic compounds. CONCLUSION: This study outlines a sustainable approach to cultivating edible halophytes in IMTA systems, with applications in saline farming, functional foods and aquaculture wastewater treatment.eng
dc.description.sponsorshipPT-IL/0003/2019
dc.identifier.doi10.1002/jsfa.70270
dc.identifier.eissn1097-0010
dc.identifier.issn0022-5142
dc.identifier.urihttp://hdl.handle.net/10400.1/27923
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWiley
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relationCentre for Marine and Environmental Research
dc.relationExploring salt tolerant plants as sources of innovative food additives
dc.relationMediterranean Institute for Agriculture, Environment and Development
dc.relationCHANGE - Global Change and Sustainability Institute
dc.relation.ispartofJournal of the Science of Food and Agriculture
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectBiosaline agriculture
dc.subjectSustainability
dc.subjectCircular economy
dc.subjectPhytoremediation
dc.titleOptimizing germination and cultivation of edible halophytes using effluents from an IMTA systemeng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardTitleExploring salt tolerant plants as sources of innovative food additives
oaire.awardTitleMediterranean Institute for Agriculture, Environment and Development
oaire.awardTitleCHANGE - Global Change and Sustainability Institute
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
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oaire.citation.titleJournal of the Science of Food and Agriculture
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oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameCastañeda-Loaiza
person.familyNameRodrigues
person.familyNameQuintas
person.familyNameRatao
person.familyNameCustódio
person.givenNameViana
person.givenNameMaria João
person.givenNameCélia
person.givenNameIsabel
person.givenNameLuísa
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person.identifier.orcid0000-0003-4338-7703
person.identifier.ridA-1477-2013
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