Mycochemical Changes Induced by Selenium Enrichment in P. ostreatus Fruiting Bodies

Abstract

The effects of selenium enrichment on the biological efficiency, phenolic compounds, amino acid profile, antioxidant capacity, and cellular antioxidant activity (CAA) were evaluated in Pleurotus ostreatus fruiting bodies (FB) harvested during three sequential flushes. Sodium selenate was used to reach selenium content of 17.5 or 5.8 mg/kg in the sorghum straw substrate. Biological efficiency and total selenium content increased. One of the main differences among treatments was in ergothioneine content, an indicator of oxidative stress that was positively related with valine and isoleucine contents and negatively related to leucine and phenylalanine. Besides ergothioneine, nucleosides derived from adenine and uracyl were the major peaks observed in all treatments, and coumaric and ferulic acids were found in the bound phenolics extract. Selenium enrichment also affected the antioxidant capacity, and particularly the methanolic extract obtained from the second flush of FB cultivated in selenium-enriched substrate (17.5 mg/kg) had the best CAA.

Circular reuse of bio-resources: the role ofPleurotusspp. in the development of functional foods

“…Particularly in a strain of P. ostreatus, bound coumaric and ferulic acids were found at the levels of 556 and 90 µg per 100 g d.w., respectively. 72 The presence of phenolic acids in the Pleurotus genus was confirmed in other studies with P. ostreatus, P. eryngii and P. sajor-caju. [73][74][75] Some authors have identified the presence of flavonoids in Pleurotus spp.…”

Selenium and Zinc Biofortification of Pleurotus eryngii Mycelium and Fruiting Bodies as a Tool for Controlling Their Biological Activity

“…Moreover, zinc and, in a lesser degree, selenium supplementation positively affected gallic acid content in P. eryngii mycelium, while this acid was not detected in fruiting bodies. According to Carrasco-Gonzalez et al [21], coumaric and ferulic acid contents in P. ostreatus fruiting bodies were positively affected through Se biofortification.…”

“…Gallic acid is known to activate diverse pharmacological and biochemical effects in humans including strong anti-cancer, antioxidant, and anti-inflammatory factors [20]. In addition, it elevated the levels of enzymatic and nonenzymatic antioxidants [21]. Pleurotus eryngii is a significant source of lovastatin, also known as monocline k, which is a naturally occurring compound, and the hypolipidemic agent acts through the inhibition of the HMG-CoA reductase [22].…”

Selenium biofortification ofPleurotusspecies and its effect on yield, phytochemical profiles, and protein chemistry of fruiting bodies

“…A 36 kDa Se‐containing protein isolated and purified from Ganoderma lucidum , that contained 3 times more Se than its crude form, showed 3 times the radical‐scavenging activity as compared to the crude form, demonstrating that the increasing antioxidant property of this protein depended quantitatively on its Se content (Du, Zhao, Li, Zhao, & Hu, ). Carrasco‐Gonzalez, Serna‐Saldívar, and Gutierrez‐Uribe () reported increase in total antioxidant power of P. ostreatus was associated with increase in Se content.…”