MTs in Palaemonetes argentinus as potential biomarkers of zinc contamination in freshwaters

BERTRAND, LIDWINA; MONFERRÁN, MAGDALENA VICTORIA; MÉTAIS, ISABELLE; MOUNEYRAC, CATHERINE; AMÉ, MARÍA VALERIA

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2015 vol. 48 p. 533 - 533

quatic invertebrates take up and accumulate essential and non-essential trace metals even when both are likely to be poisonous. In order to study the potential of the metallothioneins (MTs) as biomarkers of metal contamination in native shrimp Palaemonetes argentinus, organisms have been exposed at 0, 5, 50 and 500 µg L-1 of zinc for 96 h. Moreover, accumulation and subcellular distribution of this essential metal were evaluated. A significant Zn accumulation was observed in different body sections. Higher Zn levels occurred in cephalothorax compared to abdomen, especially at the highest exposure concentration (500 µg ZnL-1). A clear differential subcellular metal distribution between cephalothorax and abdomen was also observed. In cephalothorax Zn was similarly distributed between the soluble and insoluble fractions; while in abdomen, when total Zn increased, insoluble metal augmented more markedly than the soluble one. Cytosolic Zn levels increased more in cephalothorax than in ab