Fluorescence induction as a biomarker of creosote phototoxicity to the aquatic macrophyte Lemna gibba
- Univ. of Guelph, Ontario (Canada). Centre for Toxicology
- Univ. of Waterloo, Ontario (Canada). Dept. of Biology
Biomarkers of polycyclic aromatic hydrocarbon (PAH) toxicity to aquatic plants were developed using the wood preservative creosote. The authors tested physiological indicators of photosynthetic performance in cultures of the floating aquatic macrophyte Lemna gibba (G3). Creosote was applied at concentrations ranging from 1--300 ppm, and plants were grown under laboratory lighting that mimics the relative levels of UV radiation found in natural sunlight (simulated solar radiation; SSR). Population growth bioassays demonstrated that similar to individual PAHs, creosote exhibited UV-enhanced phototoxicity. Chlorophyll content and chlorophyll fluorescence induction parameters were also diminished by creosote, and closely corresponded to functional responses of population growth by the end of each experiment. Fluorescence induction thus is a validated biomarker assay that is closely and functionally related to population growth inhibition in aquatic plants.
- OSTI ID:
- 495380
- Report Number(s):
- CONF-9504216-; TRN: IM9731%%73
- Resource Relation:
- Conference: 5. Environmental toxicology and risk assessment: biomarkers and risk assessment, Denver, CO (United States), 2-7 Apr 1995; Other Information: PBD: 1996; Related Information: Is Part Of Environmental toxicology and risk assessment: Biomarkers and risk assessment. Volume 5; Bengtson, D.A.; Henshel, D.S. [eds.]; PB: [485] p.; ASTM special technical publication, 1306
- Country of Publication:
- United States
- Language:
- English
Similar Records
UV-induced changes in humic acid and its effects on PAH phototoxicity to aquatic macrophytes
Fluorescence induction as a bioindicator of creosote toxicity in plants