SYMPOSIA PAPER Published: 01 January 1983
STP33523S

Uptake and Toxicity of Organic Compounds: Studies with an Aquatic Macrophyte ( )

Source

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 (14C) 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.

Author Information

Lockhart, WL
Canada Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, Manitoba, Canada
Billeck, BN
Canada Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, Manitoba, Canada
de March, BGE
Canada Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, Manitoba, Canada
Muir, DCG
Canada Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, Manitoba, Canada
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Details
Developed by Committee: E47
Pages: 460–468
DOI: 10.1520/STP33523S
ISBN-EB: 978-0-8031-4868-0
ISBN-13: 978-0-8031-0255-2