Journal
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
Volume 95, Issue 5, Pages 1343-1350Publisher
SPRINGER
DOI: 10.1007/s00253-011-3724-2
Keywords
Bioassays; Bioluminescence; Enzyme activity; Metals; Mutation; Seed germination
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Funding
- Yeungnam University
- Korea Institute of Geoscience and Mineral Resources
- Ministry of Knowledge and Economy
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The sensitivities of four different kinds of bioassays to the toxicities of arsenite, chromate, cadmium, and copper were compared. The different bioassays exhibited different sensitivities, i.e., they responded to different levels of toxicity of each of the different metals. However, with the exception of the alpha-glucosidase enzyme activity, arsenite was the most toxic compound towards all the tested organisms, exhibiting the highest toxic effect on the seeds of Lactuca, with an EC50 value of 0.63 mg/L. The sensitivities of Lactuca and Raphanus were greater than the sensitivities of two other kinds of seeds tested. Therefore, these were the seeds appropriate for use in a seed germination assay. A high revertant mutagenic ratio (5:1) of Salmonella typhimurium was observed with an arsenite concentration of 0.1 mu g/plate, indicative of a high possibility of mutagenicity. These different results suggested that a battery of bioassays, rather than one bioassay alone, is needed as a more accurate and better tool for the bioassessment of environmental pollutants.
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