Selenium is a mineral known to reduce incidence of chronic degenerative diseases. Pleurotus mushrooms cultivated on substrates enriched with selenium can incorporate this mineral in their fruiting bodies and modify their mycochemical profile. The effect of selenium enrichment on the biological efficiency, phenolic compounds, amino acid profile and cellular antioxidant activity was evaluated in P. ostreatus fruiting bodies harvested during three sequential flushes. Selenium enrichment with 17.5 or 5.8 mg/kg increased the biological efficiency and total selenium content. The ergothioneine content was positively related to the content of valine and isoleucine and negatively to leucine and phenylalanine. These amino acids have been previously related to oxidation in mushrooms. Phenolic acids were not found in free phenolic compounds extract, however p-coumaric and ferulic were detect in the extract of bound phenolic compounds. Nucleosides derived from adenine (5'-Deoxy-5'-(methylsulfinyl) adenosine and uracyl (1-(2,3-di-O-acetyl-2-C-methyl-5-O-p-methylbenzoyl-β-D-ribofuranosyl)uracil) were the major peaks observed in the methanolic extract, followed by phenylalanine and agaritine. p-Coumaric and ferulic acids were detected in bound phenolic extract. Selenium enrichment affected the abundance of mycochemical profile and cellular antioxidant activity of P. ostreatus fruiting bodies

Bioactive compounds and cellular antioxidant activity of selenized P. ostreatus fruiting bodies

253rd National Meeting (2017)

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