Journal of Environmental BiologypISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP |
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Abstract - Issue Nov 2008, 29 (6) BackEffects of zinc on morphology
of erythrocytes and
spleen in Carassius gibelio Elena Tomova*, Atanas Arnaudov and Iliana Velcheva (Received:
March 03, 2007; Revised received: August 07, 2007; Accepted: November 05, 2007) Abstract: The influence of increased zinc
concentrations (0.1, 0.5, 1.0, 1.5 and 2.0 mg-1 ZnSO4.7H2O) on the total number and
the morphology of the erythrocytes, as well as the processes related to their
formation and destruction in the spleen of Carassius gibelio were investigated ex situ. It was found that zinc
concentrations caused pathological alterations in the erythrocytes that were
not identical in the different concentrations – poikilocytosis;
ruptures in cell membranes in the concentrations of 0.5 mg-1 and 1.5
mg-1; cells with double nuclei (symplasts);
in the concentration of 1.0 mg-1; in the highest concentrations (1.5
mg-1 and 2.0 mg-1) presence of erythrocytes at initial
stage of atypical mitotic division. Against the background of those various
alterations, the total number of the erythrocytes in the peripheral blood
increased simultaneously with the increase of zinc concentrations (p<0.001).
Morphological alterations in the spleen were also observed, indicating a
compensational tendency against the toxic influence of zinc upon the fish
erythrocytes – hyperplasia of the red pulp and lack of hemosiderin.
These results show that the alterations in the total number and the morphology
of the erythrocytes are connected with the relevant compensatory histopathological alterations in the spleen. The use of the
ascertained alteration could be valuable in monitoring zinc-polluted waters. Key
words: Zinc, Toxic influence, Carassius gibelio, Erythrocytes,
Spleen PDF of full length paper is available with author (*e_tomova@abv.bg) Copyright © 2008 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any
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