Heavy metal tolerance potential of Aspergillus strains isolated from mining sites

Autor: O. G. Oladipo, Cornelius Carlos Bezuidenhout, Akin Olayinka, Mark Maboeta, Obinna T. Ezeokoli, O. O. Awotoye
Rok vydání: 2016
Předmět:
Zdroj: Bioremediation Journal. 20:287-297
ISSN: 1547-6529
1088-9868
DOI: 10.1080/10889868.2016.1250722
Popis: Increased heavy metal pollution generated through anthropogenic activities into the environment has necessitated the need for eco-friendly remediation strategies such as mycoremediation. With a view to prospecting for fungi with heavy metal remediation potentials, the tolerance of five Aspergillus species isolated from soils of three active gold and gemstone mining sites in southwestern Nigeria to varied heavy metal concentrations was investigated. Isolated Aspergillus strains were identified based on the internal transcribed spacer 1 and 2 (ITS 1 and ITS 2) regions. Growth of Aspergillus strains were challenged with a range of varied concentrations of heavy metals: cadmium (Cd) (0–100), copper (Cu) (0–1000), lead (Pb) (0–400), arsenic (As) (0–500), and iron (Fe) (0–800) concentrations (ppm) incorporated into Malt Extract Agar (MEA) in triplicates. Mycelial radial growths were recorded at intervals of 3 days during a 13-day incubation period. Aspergillus strains were identified as A. tubingensis, ...
Databáze: OpenAIRE
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