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Advisor(s)
Abstract(s)
Pleurotus eryngii (DC.) Quél. is widely recognized for its organoleptic qualities and health benefits,
being commercially produced in great extent in Asia, Europe, and North America [1]. Depending on
the size of the mushroom industry, an expressive volume (20 to 35% in weight of fresh mushrooms)
of bio-residues are often discarded, even though their content in biomolecules is not necessarily
compromised [2]. Hence, there are major opportunities to turn these outcomes into high-value
products through the recovery of bioactive compounds, such as ergosterol rich extracts. Ergosterol,
one of the main sterols in mushrooms, has been reported to be the major contributor in P. eryngii
bio-functionalities [2]. In the present work, P. eryngii bio-residues (PER) and intact mushrooms
(PEG) were compared for their ergosterol content. Response Surface Methodology (RSM) was applied
using heat-assisted extraction methodology. The combined effect of time (10-150 min) and
temperature (30-90°C) was performed using a circumscribed central composite design (CCCD), and
the response criteria were extraction yield and ergosterol content using HPLC-UV. The global optimum
conditions predicted by the model were 112.7 min, 90°C, and 150 min, 61.8°C for PER and
PEG, respectively. Under these conditions, 190.14 and 360.58 mg of ergosterol per 100 g of dry
weight sample were recovered from PER and PEG, correspondingly. Even though P. eryngii bio-residues
presented up to 53% of PEG ergosterol yield, PER offers sustainable and economic advantages.
These results confirm the enormous potential of the under-exploited P. eryingii bio-residues as
a valuable source of ergosterol-rich extracts.
Description
Keywords
Pleurotus eryngii (DC.) Quél. Ergosterol-rich
Citation
Taofiq, Oludemi; Silva, Ana Rita; Caleja, Cristina; Barros, Joana; Ferreira, Inês; Nunes, João; Prieto Lage, Miguel A.; Barros, Lillian; Ferreira, Isabel C.F.R. (2019). Eco-sustainable recovery of ergosterol-rich bioactive extracts from Pleurotus eryngii (DC.) Quél. In Embedding Ecology in Sustainable Development Goals. Lisboa