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Saturday, 4 June 2016

Polyporus squamosus (Huds.) Fr from different origins: Chemical characterization, screening of the bioactive properties and specific antimicrobial effects against Pseudomonas aeruginosa

Volume 69, June 01, 2016, Pages 91-97


a  Centro de Investigação de Montanha (CIMO), ESA, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 1172, Bragança, Portugal
b  University of Belgrade, Inst. for Biological Research Siniša Stanković, Department of Plant Physiology, Bulevar Despota Stefana 142, Belgrade, Serbia 

Abstract

Wild mushrooms are mainly collected during the rainy season and valued as a nutritious food and sources of natural medicines and nutraceuticals. The aim of this study was to determine the chemical composition and bioactive properties (antioxidant, antimicrobial and cytotoxicity) of Polyporus squamosus from two different origins, Portugal and Serbia. The sample from Portugal showed higher contents of as protein (17.14 g/100 g), fat (2.69 g/100 g), ash (3.15 g/100 g) and carbohydrates (77.02 g/100 g); the same sample gave the highest antioxidant activity: highest reducing power, DPPH radical scavenging activity, and lipid peroxidation inhibition in both β-carotene/linoleate and TBARS assay. These results could be related to its higher content in total tocopherols (1968.65 μg/100 g) and phenolic compounds (1.29 mg/100 g). Both extracts exhibited antibacterial activity against all the tested organisms. The samples from Serbia gave higher overall antibacterial activity and showed excellent antibiofilm activity (88.30%). Overall, P. squamosus methanolic extracts possessed antioxidant, antimicrobial, antibiofilm and anti-quorum sensing activity, and without toxicity for liver cells. This investigation highlights alternatives to be explored for the treatment of bacterial infections, in particular against Pseudomonas aeruginosa. This study provides important results for the chemical and bioactive properties, especially antimicrobial activity of the mushroom P. squamosus. Moreover, to the authors' knowledge this is the first report on sugars, organic acids, and individual phenolic compounds in P. squamosus. © 2016 Elsevier Ltd.

Author keywords

Antimicrobial activity; Bioactive properties; Chemical characterization; Polyporus squamosus
ISSN: 00236438 CODEN: LBWTASource Type: Journal Original language: English
DOI: 10.1016/j.lwt.2016.01.037Document Type: Article
Publisher: Academic Press

  Ferreira, I.C.F.R.; Centro de Investigação de Montanha (CIMO), ESA, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 1172, Portugal; email:iferreira@ipb.pt
© Copyright 2016 Elsevier B.V., All rights reserved.