R. Vaideeshwaran, J. Jayachitra and P. Sivasakthivelan

Department of Agricultural Microbiology, Faculty of Agriculture Annamalai University, Annamalai Nagar – 608002 (India) Corresponding Author: microjayachitra@gmail.com


Heavy metal contamination in soil is a rising problem across the globe due to industrial, mining, agricultural, and other activities. Fungi are the most prevalent and efficient heavy metal resistant microbial family with metal bioleaching ability. The present study aimed on the isolation and characterization of the heavy metal resistant fungal strains from polluted soil. All the strains were grown on PDA medium and Macro and Microscopic characteristics of all the strains were observed. Five strains were isolated and they were identified as Aspergillus niger (AN- 1 & AN-2) Aspergillus fumigatus (AF-3 & AF-4) and Trichoderma virens (TF-5). Screening of chromium resistant fungal isolates was examined by poison food technique. Among the five fungal strains isolated Aspergillus niger (AN-2) recorded highest mycelial growth rate (66.0mm) at 50ppm of Chromium ions. Aspergillus fumigatus (AF-4) recorded lowest mycelial growth rate (38.8mm) at 200ppm of Chromium ions

Key words : Chromium resistant fungi, Aspergillus niger, Aspergillus fumigatus and Trichoderma virens.

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