|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Experimental Biology (IJEB) >
IJEB Vol.44 [2006] >
IJEB Vol.44(01) [January 2006] >
| Title: | Aluminium toxicity induced poikilocytosis in an air-breathing teleost, Clarias batrachus (Linn.) |
| Authors: | Naskar, Ranu
Sen, N S
Ahmad, M Firoz |
| Keywords: | Aluminium toxicity
Clarias batrachus
Poikilo-cytosis |
| Issue Date: | Jan-2006 |
| Publisher: | CSIR |
| Abstract: | The present study was undertaken to assess the toxicity of acid
alone and two different sublethal concentrations of aluminium, (25% and 75%
dose of 96 hr LC50 value in acidified soft water of pH 5) on red blood cells of a
stenohaline catfish, C. batrachus for
an acute exposure of 5 days. The scanning electron microscopic studies on all
the three treated groups revealed several kinds of erythrocyte alterations and
modifications with abnormal morphology. These included abnormal
surface-wrinkling accompanied with excessive roughness on the membrane,
erythrocytes with surface granulation in higher dose and finally the appearance
of morphologically abnormal forms, the codocyte (target cell) and the
stomatocyte. The results suggest that abnormality in the shape of erythrocytes
could be linked to altered surface membrane area to volume ratio, decrease in
cytoplasmic volume owing to reduced Hb content or increase in the amount of
water content within the cell resulting from osmotic disequilibrium. In this
context, the abnormal surface membrane morphology could be attributed to
cytoskeleton fragility and defects in structural proteins. Further, the acid
group exhibited a striking behavior of cellular adhesion and bonding to
adjoining cell surfaces, culminating in several bunches which thereby reduces
the surface area for gaseous exchange and could produce blocking effect while
flowing through microcirculation. |
| Page(s): | 83-85 |
| ISSN: | 0975-1009 (Online); 0019-5189 (Print) |
| Source: | IJEB Vol.44(01) [January 2006]
|
|
