Pregled bibliografske jedinice broj: 535328
Hormetic response of earthworm (Eisenia fetida) to subeffect exposure to malathion
Hormetic response of earthworm (Eisenia fetida) to subeffect exposure to malathion // International Life Sciences Students Conference 2008 : abstracts
Varšava, Poljska, 2008. (predavanje, međunarodna recenzija, sažetak, znanstveni)
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Naslov
Hormetic response of earthworm (Eisenia fetida) to subeffect exposure to malathion
Autori
Velki, Mirna
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
International Life Sciences Students Conference 2008 : abstracts
/ - , 2008
Skup
International Life Sciences Students Conference
Mjesto i datum
Varšava, Poljska, 10.09.2008. - 14.09.2008
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
earthworm; malathion; hormetic response; acetylcholinesterase
Sažetak
Scientists as well as agronomists, farmers and other people using soil pay more and more attention to methods of investigation of soil pollution as the basis of health food production. Earthworms are common test organisms in terrestrial ecotoxicology i.e. in biomonitoring of soil pollution. Even though the properties of some molecular biomarkers of earthworms, in environmental pollution monitoring have been well investigated, although many important questions in biomarker applicability in real time environmental pollution monitoring remain unsolved. One of them is a question of effects of small so called subeffect doses. In this study, adult Eisenia fetida earthworms were exposed to the sub-lethal concentrations of malathion using the contact filter paper test procedure. Since malathion is an organophosphate parasympathomimetic pesticide which binds irreversibly to cholinesterase, its effects on earthworms were determined by measuring ChE inhibition — a known biomarker of exposure. The ChE activity was measured after a short time of exposure — 2 h. As expected, the lowest ChE activity was measured at the highest concentration of malathion applied. More interestingly, at the 0.1 ng cm−2 concentration the ChE activity increased up to 30.3% of activity in the control in all conducted experiments. Dose-response curves showed an inverted U-shape characteristic for hormesis. This hormetic-like effect could be important for the health status of an earthworm as well for correct interpretation of biomonitoring results.
Izvorni jezik
Engleski
Znanstvena područja
Biologija
