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Sensitivity of marine microalgae to copper: the effect of biotic factors on copper adsorption and toxicity.
Sci Total Environ. 2007 Nov 15; 387(1-3):141-54.ST

Abstract

Microalgae are sensitive indicators of environmental change and, as the basis of most freshwater and marine ecosystems, are widely used in the assessment of risk and development of environmental regulations for metals. However, interspecies differences in sensitivity to metals are not well understood. The relationship between metal-algal cell binding and copper sensitivity of marine microalgae was investigated using a series of 72-h growth-rate inhibition bioassays and short-term (1-h) uptake studies. A range of marine algae from different taxonomic groups were screened to determine whether copper adsorption to the cell membrane was influenced by biotic factors, such as the ultrastructure of cell walls and cell size. Minutocellus polymorphus was the most sensitive species to copper and Dunaliella tertiolecta the least sensitive, with 72-h IC50 values (concentration to inhibit growth-rate by 50%) of 0.6 and 530 microg Cu/L, respectively. Copper solution-cell partition coefficients at equilibrium (K(d)) were calculated for six species of algae on a per cell and surface area basis. The largest and smallest cells had the lowest and highest K(d) values, respectively (on a surface area basis), with a general (non-linear) trend of decreasing K(d) with increasing cell surface area (p=0.026), however, no relationship was found between K(d) and copper sensitivity, nor cell size and copper sensitivity. Interspecies differences in copper sensitivity were not related to cell size, cell wall type, taxonomic group or K(d) values. The differences in sensitivity may be due to differences in uptake rates across the plasma membrane, in internal binding mechanisms and/or detoxification mechanisms between the different microalgal species.

Authors+Show Affiliations

Centre for Environmental Contaminants Research, CSIRO Land and Water, Private Mail Bag 7, Bangor, NSW, Australia. jacqueline.levy@csiro.auNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17765293

Citation

Levy, Jacqueline L., et al. "Sensitivity of Marine Microalgae to Copper: the Effect of Biotic Factors On Copper Adsorption and Toxicity." The Science of the Total Environment, vol. 387, no. 1-3, 2007, pp. 141-54.
Levy JL, Stauber JL, Jolley DF. Sensitivity of marine microalgae to copper: the effect of biotic factors on copper adsorption and toxicity. Sci Total Environ. 2007;387(1-3):141-54.
Levy, J. L., Stauber, J. L., & Jolley, D. F. (2007). Sensitivity of marine microalgae to copper: the effect of biotic factors on copper adsorption and toxicity. The Science of the Total Environment, 387(1-3), 141-54.
Levy JL, Stauber JL, Jolley DF. Sensitivity of Marine Microalgae to Copper: the Effect of Biotic Factors On Copper Adsorption and Toxicity. Sci Total Environ. 2007 Nov 15;387(1-3):141-54. PubMed PMID: 17765293.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sensitivity of marine microalgae to copper: the effect of biotic factors on copper adsorption and toxicity. AU - Levy,Jacqueline L, AU - Stauber,Jennifer L, AU - Jolley,Dianne F, Y1 - 2007/08/31/ PY - 2007/03/21/received PY - 2007/06/08/revised PY - 2007/07/12/accepted PY - 2007/9/4/pubmed PY - 2008/1/4/medline PY - 2007/9/4/entrez SP - 141 EP - 54 JF - The Science of the total environment JO - Sci Total Environ VL - 387 IS - 1-3 N2 - Microalgae are sensitive indicators of environmental change and, as the basis of most freshwater and marine ecosystems, are widely used in the assessment of risk and development of environmental regulations for metals. However, interspecies differences in sensitivity to metals are not well understood. The relationship between metal-algal cell binding and copper sensitivity of marine microalgae was investigated using a series of 72-h growth-rate inhibition bioassays and short-term (1-h) uptake studies. A range of marine algae from different taxonomic groups were screened to determine whether copper adsorption to the cell membrane was influenced by biotic factors, such as the ultrastructure of cell walls and cell size. Minutocellus polymorphus was the most sensitive species to copper and Dunaliella tertiolecta the least sensitive, with 72-h IC50 values (concentration to inhibit growth-rate by 50%) of 0.6 and 530 microg Cu/L, respectively. Copper solution-cell partition coefficients at equilibrium (K(d)) were calculated for six species of algae on a per cell and surface area basis. The largest and smallest cells had the lowest and highest K(d) values, respectively (on a surface area basis), with a general (non-linear) trend of decreasing K(d) with increasing cell surface area (p=0.026), however, no relationship was found between K(d) and copper sensitivity, nor cell size and copper sensitivity. Interspecies differences in copper sensitivity were not related to cell size, cell wall type, taxonomic group or K(d) values. The differences in sensitivity may be due to differences in uptake rates across the plasma membrane, in internal binding mechanisms and/or detoxification mechanisms between the different microalgal species. SN - 0048-9697 UR - https://www.unboundmedicine.com/medline/citation/17765293/Sensitivity_of_marine_microalgae_to_copper:_the_effect_of_biotic_factors_on_copper_adsorption_and_toxicity_ DB - PRIME DP - Unbound Medicine ER -
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