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International Journal Of Rural Development, Environment And Health Research(IJREH)

Evaluation of Cadmium tolerant Fungi in the dying Staff and their removal Potential

Tesfalem Belay Woldeamanuale

International Journal of Rural Development, Environment and Health Research(IJREH), Vol-1,Issue-2, July - August 2017, Pages 1-9,

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Cadmium tolerance and bioremediation capacity of seven isolates including Aspergilus versicolor, Aspergillus fumigatus, Paecilomyces sp.9, Paecilomyces sp.G, Terichoderma sp, Microsporum sp,Cladosporium sp were determined. Minimum inhibitory concentration values among 2,000-6,000 mg lˉ1proved great ability of isolated strains to survive in cadmium polluted environments. The most tolerant fungi, Aspergilus versicolor, showed tolerance index of 0.93 in 100 mg lˉ1 cadmium agar media. Fungal resistance against cadmium is depended directly on strain’s biological function. A. versicolor was found to bioaccumulation over 7.67mg of cadmium per 1 g of mycelium, followed by 6.546, 6.354, and 6.286, 6.134 by Paecilomyces sp, Aspergilus fumigatus, Microsporum sp and Terichoderma sp, respectively. It can be noted that tolerance of the strains appears to be independent from bioaccumulation capacity. Finally, the results indicated that A. versicolor could be a prospective candidate for bioremediation processes.

Cadmium tolerance, Bioremediation, Fungi.

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