1. Toward an Increased Functionality in Oyster ( Pleurotus) Mushrooms Produced on Grape Marc or Olive Mill Wastes Serving as Sources of Bioactive Compounds.
- Author
-
Koutrotsios G, Kalogeropoulos N, Kaliora AC, and Zervakis GI
- Subjects
- Culture Media chemistry, Culture Media metabolism, Ergosterol analysis, Hydroxybenzoates analysis, Olea metabolism, Pleurotus chemistry, Pleurotus metabolism, Resveratrol, Stilbenes analysis, Vitis metabolism, beta-Glucans analysis, Olea chemistry, Pleurotus growth & development, Vitis chemistry, Waste Products analysis
- Abstract
Pleurotus ostreatus, P. eryngii, and P. nebrodensis were cultivated on nonconventional substrates containing grape marc (GMC) or olive mill byproducts (OMB); wheat straw (WHS) served as control. GMC-based media demonstrated equal/better mushroom productivity than WHS for P. eryngii and P. nebrodensis, while the cultivation performance of P. eryngii was improved in OMB-based media. Both GMC and OMB substrates led to large increase of fruit-bodies content in phenolic acids, resveratrol, triterpenic compounds, and ergosterol; in particular, P. eryngii mushrooms presented significantly more total phenolics and exhibited much higher antioxidant activity (2- to 8-fold increase). Furthermore, substrates containing GMC or OMB presented up to 27% increase in mushroom β-glucans. Overall, Pleurotus species responded in a different and mostly substrate-specific manner by selectively absorbing organic compounds. Phenolics and squalene content of substrates correlated very well with mushrooms antioxidant activity and ergosterol, respectively; the same was observed for triterpenics' content of substrates and mushrooms.
- Published
- 2018
- Full Text
- View/download PDF