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Bioactive properties of the medicinal mushroom Leucopaxillus giganteus mycelium obtained in the presence of different nitrogen sources

2007Journal article Open access
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dc.contributor.authorBarros, Lillian
dc.contributor.authorBaptista, Paula
dc.contributor.authorEstevinho, Leticia M.
dc.contributor.authorFerreira, Isabel C.F.R.
dc.date.accessioned2008-09-12T15:40:20Z
dc.date.available2008-09-12T15:40:20Z
dc.date.issued2007
dc.description.abstractLeucopaxillus mushroom species are used in the chemical industry for extraction of clitocybin antibiotic and particularly the edible mushroom Leucopaxillus giganteus can be found in Northeast Portugal. Nevertheless, the production of its mycelium for pharmacological applications has not been explored. Herein, the mycelium obtained in the presence of four different nitrogen sources was investigated with regard to phenol production and antimicrobial and antioxidant properties. Phenol concentration increased along the growth time as a response to the oxidative stress and therefore free radical production. Although significant differences for mycelium growth between the nitrogen sources had not been observed, (NH4)2HPO4 proved to be the most appropriate to increase bioactive properties, leading to the highest phenol content and lowest EC50 and MIC values. The antimicrobial capacity was screened against Gram positive and Gram negative bacteria, and fungi. The samples selectively inhibited the growth of Gram positive bacteria, Staphylococcus aureus being the most susceptible one. Gram negative bacteria and fungi were resistant to the extracts. Antioxidant activity was calculated by the reducing power assay, the scavenging effect on DPPH radicals, and hemolysis and lipid peroxidation inhibition. Significantly negative linear regressions were established between phenols/flavonoids contents, which increased along the mycelia growth time and antioxidant activity.en
dc.identifier.citationBarros, Lillian; Baptista, Paula; Estevinho, Letícia M.; Ferreira, Isabel C.F.R. (2007). Bioactive properties of the medicinal mushroom Leucopaxillus giganteus mycelium obtained in the presence of different nitrogen sources. Food Chemistry. ISSN 0308-8146. 105:1, p. 179-186en
dc.identifier.doi10.1016/j.foodchem.2007.03.063
dc.identifier.issn0308-8146
dc.identifier.urihttp://hdl.handle.net/10198/833
dc.language.isoengen
dc.publisherElsevieren
dc.subjectMushroom myceliumen
dc.subjectNitrogen sourceen
dc.subjectAntimicrobial activityen
dc.subjectAntioxidant potentialen
dc.subjectNutraceuticalsen
dc.titleBioactive properties of the medicinal mushroom Leucopaxillus giganteus mycelium obtained in the presence of different nitrogen sourcesen
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PPCDT%2FAGR%2F56661%2F2004/PT
oaire.fundingStream3599-PPCDT
person.familyNameBarros
person.familyNameBaptista
person.familyNameMiranda Fernandes Estevinho
person.familyNameFerreira
person.givenNameLillian
person.givenNamePaula
person.givenNameMaria Leticia
person.givenNameIsabel C.F.R.
person.identifier469085
person.identifier144781
person.identifier.ciencia-id9616-35CB-D001
person.identifier.ciencia-id7D11-FE1E-CD0F
person.identifier.ciencia-idBA14-09D6-A406
person.identifier.ciencia-id9418-CF95-9919
person.identifier.orcid0000-0002-9050-5189
person.identifier.orcid0000-0001-6331-3731
person.identifier.orcid0000-0002-9249-1948
person.identifier.orcid0000-0003-4910-4882
person.identifier.ridJ-3600-2013
person.identifier.ridE-8500-2013
person.identifier.scopus-author-id35236343600
person.identifier.scopus-author-id14051688000
person.identifier.scopus-author-id6506577664
person.identifier.scopus-author-id36868826600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticleen
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