Response of Aspergillus flavus, Aspergillus niger and Penicillium citrinum to oxidative stress induced by Fenton’s reagent

Theodor Bilharz Research Institute

Bibliographic Information

Authors: Abdel-Wareth M.T.A.; Abdel-Wahed R.T.

Journal: International Journal of Environmental Studies

Publisher: Routledge

Publication Date: 27 November 2017

Volume / Issue: Volume 75 / Issue 4

Pages: 605–622

ISSN: 207233

DOI: 10.1080/00207233.2017.1403810

Scopus: View on Scopus

Document Type: Article

Authors and Affiliations

Abdel-Wareth M.T.A., Department of Environmental Research and Medical Malacology, Theodor Bilharz Research Institute, Giza, Egypt; Abdel-Wahed R.T., Chemical and Electrometallurgy Treatment Division, Department of Mineral Technology, Central Metallurgical R&D Institute, Helwan, Egypt

Abstract

The presence of fungi in water systems represents a threat to human health. Hydrogen peroxide is known for its disinfecting properties and easy decomposition to water and oxygen. Its activity can be enhanced by the addition of iron as a catalyst, a reagent known as Fentonʼs reagent. In the present study, different Fenton concentrations were investigated on the spores of Aspergillus flavus, Aspergillus niger and Penicillium citrinum at different time intervals. The results indicate that complete inactivation of spores was noticed after 60 min of exposure to both 2 and 3% H2O2 catalyzed by 0.025 g Fe2+/100 ml for A. niger, and 3% H2O2 catalysed by 0.075 g Fe2+/100 ml for P. citrinum. The activity of two antioxidant enzymes, superoxide dismutase (SOD) and catalase (CAT), was determined in mycelial mat harvested after 7 days. Their activities were either highly increased or reached their minimum values prior to inactivation of spores. © 2017, © 2017 Informa UK Limited, trading as Taylor & Francis Group.

Keywords

Aspergillus flavus; Aspergillus niger; catalase; Fenton’s reagent; Penicillium citrinum; superoxide dismutase; Catalysis; Enzymes; Health risks; Iron compounds; Super oxide dismutase; Aspergillus

Citation Information

Scopus Citations: 0

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