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Mutagenic effect of cadmium on Trichoderma viride
1Department of Environmental Science, Faculty of Chemical Technology, Slovak Technical University, Bratislava.
Acta Microbiologica Hungarica
|January 1, 1993
Summary
Cadmium ions significantly inhibit the growth of Trichoderma viride fungus, leading to morphological changes and the isolation of distinct white and yellow mutants with altered characteristics.
Area of Science:
- Mycology
- Environmental Toxicology
- Fungal Genetics
Background:
- Filamentous fungi like Trichoderma viride are crucial in various ecosystems.
- Heavy metals, such as cadmium, pose environmental risks and can impact microbial life.
- Understanding metal toxicity mechanisms is vital for environmental remediation and biotechnology.
Purpose of the Study:
- To investigate the effects of cadmium ions (Cd++) on the growth and differentiation of Trichoderma viride.
- To identify and characterize morphological and genetic changes induced by cadmium exposure.
Main Methods:
- Exposure of Trichoderma viride to 10 mM cadmium ion (Cd++) solution.
- Observation of growth inhibition and morphological alterations.
- Isolation and characterization of cadmium-induced mutants.
Main Results:
- Cadmium ions at 10 mM significantly retarded fungal growth.
- Morphological changes were observed in response to cadmium treatment.
- Two white mutants (lacking conidiophores, one producing crystals) and one yellow mutant (altered conidia color, slower growth) were isolated.
Conclusions:
- Cadmium ions induce significant growth inhibition and morphological abnormalities in Trichoderma viride.
- Mutant strains with altered developmental pathways and characteristics were successfully isolated, indicating genetic changes.
- This study highlights the impact of heavy metal toxicity on fungal development and provides insights into potential mechanisms of resistance or adaptation.