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Seasonal variation in the ultrastructure and calcium uptake rate of cardiac sarcoplasmic reticulum in ground sqirrel

Tang Yajun, Wang Shiqiang, Zhou Zengquan

Department of Physiology and Biophysics, College of Life Science, Peking University. Beijing 100871

Abstract

The ultrastructure and calcium uptake rate of the cardiac sarcoplasmic reticulum (SR) was quantatively compared between the ground squirrels (Citellus dauricus) in hibernating and non-hibernating season. It suggested that the function of SR in the uptake of cytosolic calcium was enhaned in hibernating season, which may play an important role in the cold tolerance of myocardium of a hibernator.

Key words: Hibernation;Cold tolerance;Cardiac sarcoplasmicretic reticulum;Ultrastructure;Morphometry;Calcium uptake

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Citing This Article：

Tang Yajun, Wang Shiqiang, Zhou Zengquan. Seasonal variation in the ultrastructure and calcium uptake rate of cardiac sarcoplasmic reticulum in ground sqirrel. Acta Physiol Sin 1995; 47 (5): (in Chinese with English abstract).