Microbial Ecotoxicology As An Emerging Research Subject

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Ji-Dong Gu


Microorganisms play an important role in cycling of elements of ecosystems, including a wide range of chemical pollutants from anthropogenic origin. These pollutants in ecosystems, particularly aquatic, and sediment and soils, are in different physical and chemical forms in association with the inorganic and organic constituents of the sediment and soils, resulting in variable availability of them to microorganisms for assimilation and transformation. A thorough and comprehensive knowledge of the physical and chemical states of them in the environments requires detailed information of both the bioavailable pollutant concentration and also the metabolic capability of the microorganisms to assess the ecological and environmental toxicity of these pollutants meaningfully. Apart from the primary role as decomposers, microorganisms are qualified to be sensitive indicators for environmental pollution, and ecological health and ecotoxicity of pollutants because of their very short generation time and quickly response to chemical pollutants than higher and large organisms. When used for testing with the same strain, different laboratories can generate high reproducible results to allow comparison of the data feasible, not mention the reduction in cost. Based on the current advances made on genomics analysis and bioinformatics, microbial genomes are easily assembled with the technologies available to providing useful transcriptomic and metabolic annotations, expression and prediction to allow advance toxicological to another level.

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Alexander, M., 1999. Biodegradation and Bioremediation (2nd ed.). Academic Press, San Diego, California.

Amann, R. I., Ludwig, W. and Schleifer, K.H., 1995. Phylogenetic identification and in situ detection of individual microbial cells without cultivation. Microbiol Rev, 59(1), 143-169. https://doi.org/ 10.1016/S0882-4010(95)90076-4

Bitton, G. and Dutka B.J., 1986. Toxicity testing using microorganisms. Vol. I. CRC Press, Boca Raton, Florida.

Cairns, J., 1983. Are single species toxicity tests alone adequate for estimating environmental hazard? Hydrobiology 100: 47-57. https://doi.org/ 10.1007/BF00394145

Cao, H., Auguet, J.C., and Gu, J.-D., 2013. Global ecological pattern of ammonia-oxidizing archaea. PLoS ONE, 8. https://doi.org/ 10.1371/journal.pone.0052853

Cheung, K.H. and Gu, J.-D., 2007. Mechanisms of hexavalent chromium detoxification by bacteria and bioremediation applications. International Biodeterioration & Biodegradation 59: 8-15. https://doi.org/ 10.1016/j.ibiod.2006.05.002

Dixon, J.B. and Weed, S.B., 1977. Minerals in soil environments. Soil Science Society of America, Madison, WI. 948 pp

Dutka, B.J. and Bitton, G., 1986. Toxicity testing using microorganisms. Vol. II. CRC Press, Boca Raton, Florida.

Gu, J.-D., 2014. Assessment of ecosystem health and ecotoxicology through chemical analysis and modeling. Ecotoxicology 23 (4): 475-479. https://doi.org/ 10.1007/s10646-014-1206-x

Gu, J.-D., 2016. Biodegradation testing: so many tests but very little new innovation. Applied Environmental Biotechnology, 1(1): 92-95. https://doi.org/ 10.18063/AEB.2016.01.007

Gu, J.-D., 2018. Bioremediation of toxic metals and metalloids for cleaning up from soils and sediments. Applied Environmental Biotechnology, 3(2): 48-51. https://doi.org/10.26789/AEB.2018.01.003

Gu, J.-D., and Wang, Y., 2013. A new era for geomicrobial ecotoxicology in environmental science research. International Biodeterioration & Biodegradation 85: 345-346. https://doi.org/ 10.1016/j.ibiod.2012.06.024

Gu, J.-D., and Wang, Y., 2014. Geomicrobial ecotoxicology as a new subject in environmental sciences is proposed. Ecotoxicology 23 (10): 1823-1825. https://doi.org/ 10.1007/s10646-014-1359-7

Han, P., and Gu, J.-D., 2015. Further analysis of anammox bacterial community structures along an anthropogenic nitrogeninput gradient from the riparian sediments of the Pearl River Delta to the deep-ocean sediments of the South China Sea. Geomicrobiology Journal 32 (9): 789-798. https://doi.org/ 10.1080/01490451.2014.1001502

Mayfield, C.I. 1993. Microbial systems. pp. 9-27. In: P. Calow (ed.), Handbook of Ecotoxicology, Vol. I, Blackwell, London

Schwarzenbach, R.P., B.I. Escher, K. Fenner, T.B. Hofstetter, C.A. Johnson, U. von Gunten and B. Wehrli, 2006. The challenge of micropollutants in aquatic systems. Science 313: 1072-1077. https://doi.org/ 10.1126/science.1127291

Stotzky, G., 1986. Influence of soil mineral colloids on metabolic processes, growth, adhesion, and ecology of microbes and viruses. Pp. 305-428. In P.M. Huang and M. Schnitzer, eds. Interactions of Soil Minerals with natural Organics and Microbes. SSSA Special Publication No. 17. Soil Science Society of America, Inc., Madison, WI

Stumm, W. and Morgan J.J., 1996. Aquatic chemistry: chemical equilibria and rates in natural waters. (3rd ed.), Wiley, New York. pp. 1022.

Whitman, W.B., Coleman, D.C. and Wiebe W.J.,1998. Prokaryotes: The unseen majority. Proc. Natl. Acad. Sci. USA 95: 6578-6583. https://doi.org/ 10.2307/44981

Yu X.Z. and Gu J.-D., 2006. Uptake, metabolism and toxicity of methyl tert-butyl ether (MTBE) in weeping willows. J Hazard Mater 137:1417-1423 https://doi.org/ 10.1016/j.jhazmat.2006.04.024

Yu X.Z. and Gu J.-D., 2007a. Accumulation and distribution of trivalent chromium and effects on hybrid willow (Salix matsudana Koidz × alba L.) metabolism. Arch Environ Contam Toxicol 52:503-511 https://doi.org/ 10.1007/s00244-006-0155-7

Yu X.Z. and Gu J.-D., 2007b. Metabolic responses of weeping willows to selenate and selenite. Env Sci Pollut Res 14:510-517 https://doi.org/ 10.1065/espr2007.04.407

DOI: http://dx.doi.org/10.26789/AEB.2019.01.001


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