Crossref journal-article
Oxford University Press (OUP)
Environmental Toxicology and Chemistry (286)
Abstract

Abstract Twelve freshwater phytoplankton species were used to investigate the factors affecting the toxicity of the organo-phosphorus insecticide fenitrothion (O,O-dimethyl-O-nitro-m-tolyl phosphorothioate) to algae. The unicellular chlorophytes Ankistrodesmus falcatus, Chlamydomonas segnis, Chlamydomonas reinhardtii, Chlorella pyrenoidosa, Chlorella vulgaris, Cosmarium sp., Pediastrum sp., Scenedesmus obliquus, Selenastrum capricornutum, and Staurastrum sp.; the bacillariophyte Navicula sp.; and the cyanophyte Anabaena sp. were exposed to three concentrations (0.1, 1.0, and 10.0 mg/L) of fenitrothion. Differential growth effects were observed among the species exposed to fenitrothion over short (96 h) and long-term (14 d) durations. Fenitrothion concentrations eliciting a 50% growth reduction over 96 h (EC50) ranged from 0.8 to 24.4 mg/L. Selected properties of the test algae (cell size, lipid content, and bioconcentration capacity) were measured and examined for their relationship to fenitrothion sensitivity. Strong correlations were obtained between fenitrothion sensitivity and cell surface area/volume (S/V) ratios, cell lipid content, and fenitrothion bioconcentration capacity of the cells, suggesting that these attributes may be useful predictors of differential sensitivity to lipophilic xenobiotics in unicellular phytoplankton. A positive relationship observed between cell S/V ratio and the bioconcentration of fenitrothion further implicates algal cell size as a significant factor in alga/pesticide interaction and subsequent vulnerability to lipophilic xenobiotics.

Bibliography

Kent, R. A., & Currie, D. (1995). Predicting algal sensitivity to a pesticide stress. Environmental Toxicology and Chemistry, 14(6), 983–991.

Authors 2
  1. Robert A. Kent (first)
  2. David Currie (additional)
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Dates
Type When
Created 15 years, 5 months ago (March 17, 2010, 10:52 a.m.)
Deposited 7 months, 4 weeks ago (Jan. 6, 2025, 10:12 a.m.)
Indexed 7 months, 3 weeks ago (Jan. 7, 2025, 12:22 a.m.)
Issued 30 years, 3 months ago (June 1, 1995)
Published 30 years, 3 months ago (June 1, 1995)
Published Online 30 years, 3 months ago (June 1, 1995)
Published Print 30 years, 3 months ago (June 1, 1995)
Funders 1
  1. Natural Science and Engineering Research Council

@article{Kent_1995, title={Predicting algal sensitivity to a pesticide stress}, volume={14}, ISSN={1552-8618}, url={http://dx.doi.org/10.1002/etc.5620140609}, DOI={10.1002/etc.5620140609}, number={6}, journal={Environmental Toxicology and Chemistry}, publisher={Oxford University Press (OUP)}, author={Kent, Robert A. and Currie, David}, year={1995}, month=jun, pages={983–991} }