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First published online November 5, 2004
Journal of Experimental Biology 207, 4225-4230 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.01280
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Effect of acute heat stress on rat adrenal glands: a morphological and stereological study

Vesna Koko*, Jelena Djordjeviæ, Gordana Cvijiæ and Vukosava Davidoviæ

Faculty of Biology, University of Belgrade, Serbia and Montenegro



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  		Fig. 1. Plasma ACTH and serum CORT levels in control and rats exposed to heat stress (60 min at 38°C). Values are means ± S.E.M., N=5 per group, ***P<0.001.

 


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  		Fig. 2. Histology of adrenal gland in stressed and control rats, stained with AZAN trichome. (A) ZF in rats exposed to heat stress, showing dark and light regions. Scale bar, 100 µm. (B) Light part of ZF in heat stressed rats, showing cells filled with lipid droplets. Scale bar, 20 µm. (C) ZR cells containing increased numbers of condensed nuclei in heat stressed rats. Interstitial fibrosis is present. Scale bar, 20 µm. (D) Adrenal gland of control rats. Scale bar, 100 µm. (E) ZF cells of control rats; a moderate number of lipid droplets was present in the cells. Scale bar, 20 µm.

 


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  		Fig. 3. Volume density of adrenal gland components and cortical zones in the control and heat stressed rats (60 min at 38°C). Values are means ± S.E.M., N=5 *P<0.05; ***P<0.001. ZG, zona glomerulosa; ZF, zona fasciculata; ZR, zona reticularis.

 


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  		Fig. 4. Absolute volume of adrenal gland and adrenal gland components in the control and heat stressed rats (60 min at 38°C). Values are means ± S.E.M., N=5 *P<0.05. ZG, zona glomerulosa; ZF, zona fasciculata; ZR, zona reticularis.

 




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