Agriculture Reference
In-Depth Information
According to Zanger et al. (1996), the so-called hepatic cells of diplopods can present a
strong expression of HSP70 in stress conditions induced by heavy metals. These cells are
found disperse through the cells of the “fat body” layer that compose the midgut and one of
their functions is to help in the detoxification of the organism (Hopkin & Read, 1992).
In a study carried out by Nadeau et al. (2001), it was investigated the feasibility of using
HSP70 as marker of the presence of soil toxicants in the midgut of the earthworm L.
terrestris . The authors concluded that HSP70 can be efficiently used in the assessment of the
toxicity of soils using test organisms exposed under laboratory conditions.
5. Conclusion
Due to the constant release of harmful substances into the terrestrial environment, it is
necessary to know their action on the organisms present there, in order to avoid triggering a
possible unbalance in the ecosystems. In this sense, we tried to present potential
bioindicators and biomarkers for ecotoxicological analyses of the soil. It is important to
highlight that the choice of the bioindicator organism is essential to the success of
environmental monitoring. Moreover, the combined use of morphological, biochemical and
genotoxic methods in the evaluation of injuries in sentinel species is interesting since it
provides a more complete understanding of the action of contaminants on organisms
exposed, besides providing a greater reliability to the results obtained in the researches. We
believe that understanding the importance of the combined use of different methodologies
in assessing the toxicity of substrates will be highly beneficial for the future work of
researchers in Ecotoxicology.
6. References
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de Iniciação Científica da UNESP , Rio Claro, Brasil, September 2010
Achazi, R. K. & Van Gestel, C. A. M. (2003) Uptake and Accumulation of PAHs by
Terrestrial Invertebrates, in: PAHs: An Ecotoxicological Perspective, Douben, P. E. T.,
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Alloway, B.J. (1994). Heavy metals in soil. Springer, ISBN 9780751401981, New York.
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