Adaptive ability of the antioxidant defence system and metal-accumulation function in tissues of pulmonary pond snail Lymnaea stagnalis under natural conditions
L. L. Gnatyshyna, Ñh. B. Pryidun, H. I. Falfushinska, O. A. Oleinyk, O. O. Bodylovska, O. P. Holubev, O. B. Stoliar
Aquatic pulmonate molluscs are considered to be relatively resistant to environmental impacts. To verify this statement, the elemental composition of the shell and oxidative stress response were determined in the pond snail Lymnaea stagnalis from industrial, contaminating radioactivity and comparatively undisturbed areas in Ukraine and Republic of Belarus. The results demonstrated higher levels of Sr in the shell of snails derived from Ukrainian water bodies and of Cu, Fe and Mn in the snails from Belarusian water bodies as compare to counterpart (p < 0,05). This difference might be the result of peculiar abiotic conditions in two geographical regions. The highest levels of heavy metals (Mn, Fe, Zn, Cd)and also Ba were indicated in the snails from the industrial site. The oxidative injure was shown in snails from the industrial and contaminating radioactivity sites due to high levels of protein carbonyls and superoxide dismutase (p < 0,05). The redox-index of glutathione was sensitive to environmental quality and went down to 0,69±0,03 in snails from the industrial site.
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