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Hydrobiological Journal

ISSN for PRINT: 0018-8166

Institutional price:	$1994.00
Issues per year:	6

Best Paper Award Selection - Editorial Board Site

2004, Volume40

116 pages

Issue price - $369.00

The Role of Metallothioneins, Acting Individually and in Mixture, in Detoxification of Cu²⁺, Zn²⁺, and Mn²⁺ in Tissues of the Bivalve Mollusk Anodonta cygnea

O. B. Stolyar
Ternopil' State Pedagogical University, Ternopil', Ukraine

V. V. Grubinko
Ternopol National Pedagogic University, Ternopol, Ukraine

R. L. Mykhayliv
Ternopil State Pedagogical University, Ternopil (Ternopol), Ukraine

Ye. V. Mishchuk
Ternopil State Pedagogical University, Ternopil (Ternopol), Ukraine

ABSTRACT

The effects of 14-day exposure of Anodonta cygnea L. to relatively low concentrations of Zn²⁺, Mn²⁺, Cu²⁺ and their mixture with Pb²⁺ in water (0.1, 0.12,0.01, and 0.01 mg/L, respectively) were investigated. Each of these metals causes an increasing metal content in the digestive gland and gills; the contents of zinc and copper in the metallothioneins rise. The content of metallothioneins in the tissues also increases. Under the influence of zinc and manganese ions, the content of copper in the tissues and activation of the prooxidant processes decrease. UV-spectra of metallothioneins loose their characteristic features. The copper ions and the copper-containing mixture lead to increased contents of this metal in tissues, the rise of antioxidant defense, and to an increase in modifications of metallothioneins revealed by their studying in UV.