Screening and identification of Resistance to cadmium, chromium filamentous fungi

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Chinese Agricultural Science Bulletin ›› 2016, Vol. 32 ›› Issue (27) : 105-108. DOI: 10.11924/j.issn.1000-6850.casb16010142

Screening and identification of Resistance to cadmium, chromium filamentous fungi

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Abstract

Eight resistant strains were screened from cadmium and chromium contaminated paddy soil by acclimation of concentration gradient approach. Five strains could endure 16 mmol/L maximum concentration of cadmium (Cd2 ), and four strains could endure 1000 mg/L maximum concentration of chromium (Cr2 ), and X29 strain could endure 16 mmol/L Cd2and 1000 mg/L Cr2 . The strains were identified from morphological examination and 18S rDNA sequence analysis. Eight filamentous fungi belonged to Metarhizium anisopliae, Phomopsis sp., Aspergillus sp., Trichoderma sp., Fusarium oxysporum, Saccharomyces cerevisiae and Penicillium sp.. Strain35 and Strain55 belonged to Penicillium sp., and the other six strains belonged to different strains. The results not only provided important strains in cadmium and chromium pollution microbial remediation, but also implied that microorganism had good utilization potentiality in heavy metal degradation and remediation.

Key words

soil; acclimation of concentration gradient; heavy metal pollution; rice

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Screening and identification of Resistance to cadmium, chromium filamentous fungi. Chinese Agricultural Science Bulletin. 2016, 32(27): 105-108 https://doi.org/10.11924/j.issn.1000-6850.casb16010142

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