INVESTIGATION OF CADMIUM TOLERANCE IN YEASTS ISOLATED FROM ISFAHAN INDUSTRIAL WASTEWATERS

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NAHVI I.; GHADERIAN M.; GHAVANINI M.H.

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Journal: Journal of Agricultural Sciences and Natural Resources Year:2002 | Volume:8 | Issue:4 Page(s): 137-146

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Title

INVESTIGATION OF CADMIUM TOLERANCE IN YEASTS ISOLATED FROM ISFAHAN INDUSTRIAL WASTEWATERS

Author(s)

NAHVI I. | GHADERIAN M. | GHAVANINI M.H. | Issue Writer Certificate

Keywords

CADMIUMQ2

SACCHAROMYCES CEREVISIAEQ4

HEAVY METALSQ2

Abstract

In recent years HEAVY METALS have received widespread attention because of their release into the environment, and toxicity to a wide variety of organisms. CADMIUM has not known biological function and is extremely toxic even at low concentrations.CADMIUM can enter the environment from various sources, such as mineral and industrial wastewater and coal combustion, and can transfer from microorganisms through food chains to higher organisms. Some microorganisms have biotechnological applications for metal removal and/or recovery. Yeasts may be better suited for this purpose than other microbial groups because of their often great tolerance toward metals and other adverse external conditions such as low pH,and their high wall binding capacity and often high intracellular uptake values. In the present study, several yeast strains from industrial wastewaters were isolated and their tolerance to CADMIUM was determined. For isolation of yeasts, samples of industrial wastewaters were taken to the laboratory, and using yeast extract chloramphenicol agar (YECA), 18 yeast strains were isolated and then pure cultured on potato dextrose agar (PDA). A strain of laboratory Saccharmoyces cerevisiae was used as control. The effect of different concentrations of CADMIUM on growth rate of control strain was examined and the concentration of CADMIUM which reduced its growth rate to 50% (EC50) was calculated. The tolerance of all yeast strains to CADMIUM was determined using growth of each strain in medium containing 15 µgmL-1 CADMIUM. According to these results, the most tolerant strain, isolated from industrial waste water showed 34.9% viability, while the viability of S. cerevisia (countrol) was 3.3% .

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APA: Copy

NAHVI, I., GHADERIAN, M., & GHAVANINI, M.H.. (2002). INVESTIGATION OF CADMIUM TOLERANCE IN YEASTS ISOLATED FROM ISFAHAN INDUSTRIAL WASTEWATERS. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 8(4), 137-146. SID. https://sid.ir/paper/9572/en

Vancouver: Copy

NAHVI I., GHADERIAN M., GHAVANINI M.H.. INVESTIGATION OF CADMIUM TOLERANCE IN YEASTS ISOLATED FROM ISFAHAN INDUSTRIAL WASTEWATERS. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2002;8(4):137-146. Available from: https://sid.ir/paper/9572/en

IEEE: Copy

I. NAHVI, M. GHADERIAN, and M.H. GHAVANINI, “INVESTIGATION OF CADMIUM TOLERANCE IN YEASTS ISOLATED FROM ISFAHAN INDUSTRIAL WASTEWATERS,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 8, no. 4, pp. 137–146, 2002, [Online]. Available: https://sid.ir/paper/9572/en

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