Uptake and toxicity of organic compounds: studies with an aquatic macrophyte (Lemna minor)
Aquatic macrophytes have been the subjects of relatively little research attention, either for their ability to accumulate pollutants or for their susceptibility to any toxic action of pollutants. Duckweed (Lemna minor) clones were maintained in axenic culture and were exposed to several carbon-14 (/sup 14/C) labeled compounds added to the culture medium. Transfer of radioactivity from media to plants (bioconcentration) was described empirically with regression equations incorporating exposure times and concentrations, partition coefficients, and types of water used to make the culture media. In separate experiments, the growth of cultures in terms of frond numbers was described as a function of exposure time for several concentrations of the herbicides terbutryn, ethalfluralin, and fluridone. Bioconcentration and growth equations were then used to estimate those herbicide residues that should be associated with reductions in culture growth.
- Research Organization:
- Canada Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, Manitoba
- OSTI ID:
- 6242492
- Report Number(s):
- CONF-8110103-
- Journal Information:
- Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States), Vol. STP-802; Conference: American Society of Testing and Materials symposium on aquatic toxicology, St Louis, MO, USA, 15 Oct 1981
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AQUATIC ORGANISMS
BIOLOGICAL EFFECTS
HERBICIDES
TOXICITY
UPTAKE
CLONE CELLS
CULTURE MEDIA
ECOLOGICAL CONCENTRATION
ORGANIC COMPOUNDS
PLANT GROWTH
POLLUTANTS
REGRESSION ANALYSIS
RETENTION
TRACER TECHNIQUES
WATER POLLUTION
CELL CULTURES
GROWTH
ISOTOPE APPLICATIONS
MATHEMATICS
PESTICIDES
POLLUTION
STATISTICS
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)
550200 - Biochemistry
560300 - Chemicals Metabolism & Toxicology