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International Journal of Medicinal Mushrooms
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ISSN Imprimer: 1521-9437
ISSN En ligne: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.2018026548
pages 595-605

Antioxidant Activity and Infrared Spectroscopy Analysis of Alcoholic Extracts Obtained from Paecilomyces hepiali (Ascomycetes)

Lucia Ungvarská Maľučká
University of Veterinary Medicine and Pharmacy in Košice
Jarmila Harvanova
Department of Chemistry, Biochemistry, and Biophysics, Institute of Pharmaceutical Chemistry, University of Veterinary Medicine and Pharmacy, Kosice, Slovak Republic
Anna Uhrinová
Department of Chemistry, Biochemistry, and Biophysics, Institute of Pharmaceutical Chemistry, University of Veterinary Medicine and Pharmacy, Kosice, Slovak Republic
Aneta Salayová
Department of Chemistry, Biochemistry, and Biophysics, Institute of Pharmaceutical Chemistry, University of Veterinary Medicine and Pharmacy, Kosice, Slovak Republic
Martin Pavlik
Faculty of Forestry, Department of Integrated Forest and Landscape Protection, Technical University in Zvolen, Zvolen, Slovak Republic
Martin Rajtar
Mykoforest – Martin Rajtar, Velčice, Slovak Republic

RÉSUMÉ

This research studies the influence of substrate on the antioxidant activity of alcohol extracts of Paecilomyces hepiali. We used corn, rice, millet, and peas as substrates. Antioxidant activity was measured with the DPPH radical scavenging method. Concentrations of extracts (6.25, 3.12, 1.56, 0.78, and 0.39 mg/mL) were applied in all evaluations. Overall antioxidant activity was expressed as the concentration of substrate that decreased DPPH radical levels by 50% (IC50DPPH) for 7 methanol and 7 ethanol extracts. A comparison of IC50DPPH allowed us to conclude that the methanol extracts are more active in scavenging stable DPPH radicals than are the ethanol extracts. The substrate with antioxidant properties most suitable for cultivation of P. hepiali was rice supplemented with non-defatted soy flour. The extract most effective in scavenging stable radicals was the methanol extract of sample 4 (IC50DPPH = 2.33 mg/mL) cultivated on rice with nondefatted soy flour. The methanol extract of sample 7 cultivated on peas was less effective (IC50DPPH = 11.50 mg/mL). By crystallizing these extracts, we managed to obtain sufficient quantities of 6 samples in a solid state, for which infrared spectra were measured and confirmed the presence of amino acids in the extracts.


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