title: Highly cadmium tolerant fungi: their tolerance and removal potential.
abstract: BACKGROUND
  Soil and effluent of lead and zinc industries contain high concentration of cadmium. The present study was conducted to isolate tolerant fungal strains from cadmium -polluted sites in Zanjan province, Iran.
  
  
  METHODS
  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.
  
  
  RESULTS
  Minimum inhibitory concentration values among 1,000-4,000 mg l-(1)proved great ability of isolated strains to survive in cadmium polluted environments. The most tolerant fungi, Aspergilus versicolor, showed tolerance index of 0.8 in 100 mg l-(1) cadmium agar media. Fungal resistance against cadmium is depended directly on strain's biological function. A. versicolor was found to bioaccumulate over7 mg of cadmium per 1 g of mycelium, followed by 5.878, 5.243, and 5.075, 4.557 by Paecilomyces sp, Aspergilus fumigatus, Microsporum sp and Terichoderma sp, respectively.
  
  
  CONCLUSIONS
  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.
authors: Department of Environmental Health Engineering, Zanjan Universiry of Medical Sciences, Zanjan, Iran.
authors: Mehran
authors: M
authors: Mohammadian Fazli
authors: Department of Environmental Health Engineering, Zanjan Universiry of Medical Sciences, Zanjan, Iran.
authors: Negin
authors: N
authors: Soleimani
authors: Department of Environmental Health Engineering, Zanjan Universiry of Medical Sciences, Zanjan, Iran.
authors: Mohammadreza
authors: M
authors: Mehrasbi
authors: Medical Entomology and Mycology Department, School of Medicine, Zanjan Universiry of Medical Sciences, Zanjan, Iran.
authors: Sima
authors: S
authors: Darabian
authors: Medical Entomology and Mycology Department, School of Medicine, Zanjan Universiry of Medical Sciences, Zanjan, Iran.
authors: Jamshid
authors: J
authors: Mohammadi
authors: Biotechnology Departments, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran.
authors: Ali
authors: A
authors: Ramazani
keywords: Bioremediation; Cadmium tolerance; Fungi