Antioxidant activities, total phenolics and metal contents in Pleurotus ostreatus mushrooms enriched with iron, zinc or lithium

Food enrichment with minerals has been a method of increasing health benefits. Edible Pleurotus ostreatus mushrooms are a source of dietary elements and antioxidants. In this work, the phenolic content, antioxidant activity and metal content of P. ostreatus grown on coffee husk, enriched with iron (...

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Bibliographic Details
Published in:	Food science & technology Vol. 54; no. 2; pp. 421 - 425
Main Authors:	Fontes Vieira, Patrícia A., Gontijo, Douglas C., Vieira, Breno C., Fontes, Edimar A.F., Assunção, Laélia Soares de, Leite, João Paulo V., Oliveira, Maria Goreti de A., Kasuya, Maria Catarina M.
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier Ltd 01-12-2013 Elsevier
Subjects:	aluminum antioxidant activity antioxidants Biological and medical sciences cadmium chromium copper Dietary elements DPPH[rad] food enrichment Food industries Fruit and vegetable industries Fundamental and applied biological sciences. Psychology heavy metals hulls iron lead lithium minerals Mushroom enrichment mushrooms nickel phenolic compounds Pleurotus ostreatus zinc β-Carotene/linoleic acid β-Carotene/linoleic acid Dietary elements Pleurotus ostreatus DPPH Mushroom enrichment Enrichment Carotene Polyunsaturated fatty acid Lipids Lithium Iron Antioxidant Inorganic element Zinc Basidiomycota Heavy metal Linoleic acid Fungi n-6 fatty acid Pigments Phenols Carotenoid Edible fungi
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Summary:	Food enrichment with minerals has been a method of increasing health benefits. Edible Pleurotus ostreatus mushrooms are a source of dietary elements and antioxidants. In this work, the phenolic content, antioxidant activity and metal content of P. ostreatus grown on coffee husk, enriched with iron (Fe), zinc (Zn) and lithium (Li) were investigated. The content of phenolic compounds was found to be different in mushroom enriched with Fe, Zn or Li. In DPPH test, a difference was observed in antioxidant activity; however, no difference in this activity was observed using β-carotene/linoleic acid test. The enrichment with minerals promoted decrease in the content of Fe in three enriched samples. There was no change in the content of Zn in the samples. Observed the accumulation of Li in the sample enriched with LiCl and P. ostreatus enriched with Fe, Zn or Li provided minerals such as K, P, Fe, Zn, Li and Cu. In addition, no heavy metals such as Ni, Cr and Cd were detected, and only low levels of Pb and Al were observed. The study was the first report to demonstrate the understanding of how mineral supplementation reduces antioxidant activity in P. ostreatus enriched with iron, zinc or lithium. •The Pleurotus ostreatus antioxidant activity was evaluated.•Mineral enrichment reduces antioxidant activity in P. ostreatus.•P. ostreatus are useful sources of antioxidants molecules.•Mycelia of P. ostreatus enriched are dietary sources of bioelements such as K, P, Fe, Zn and Li.
Bibliography:	http://dx.doi.org/10.1016/j.lwt.2013.06.016
ISSN:	0023-6438 1096-1127
DOI:	10.1016/j.lwt.2013.06.016