Lemna minor is a species easy to collect and culture in laboratory, and can give rapid test results. However, in order to standardise toxicity tests using Lemna minor as test organism, it is important to find out what natural variability different populations might have. Five Lemna populations were used for comparison. It contained two standard cultures and three populations collected in natural habitats. Potassium dichromate was applied as test material. Lemna populations cultured under the same condi- tions showed different TD and LC50 values. There is an inverse relation between the sensitivity and TD of the strains. It is supposed that growth rate and sensitivity of Lemna populations depend on environmen- tal factors characterising the habitat in which the given popluation originally lives.
Huebert, D. B., Shay, J. M. (1993) Considerations in the assessment of toxicity using duckweeds. Environmental Toxicol. and Chem.12, 481-483.
'Considerations in the assessment of toxicity using duckweeds' () 12Environmental Toxicol. and Chem.: 481-483..
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