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Your Position :Home->Past Journals Catalog->2020 Vol.39 No.4

Comparisons of Heart Size of Bufo gargarizans from Different Altitudinal Gradients in a Common Garden Environment: Is Hesse's Rule Applicable to Ectotherms?
Author of the article:LI Ping1,2, TAN Song1,2, YAO Zhongyi1,2, FU Jinzhong1,3, CHEN Jingfeng1*
Author's Workplace:1. Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Department of Integrative Biology, University of Guelph, Guelph ON N1G 2W1, Canada
Key Words:high altitudinal adaptation; Hesse's rule; counter-gradient variation; organ size; Bufo gargarizans
Abstract:Hesse's rule refers to the relative heart weight (mass) of a common species in different populations or closely related species increases with increasing latitudinal or elevational gradients. This rule was originally found in endotherms, but whether it is applicable in ectotherms remains unknown. Here, the differences in relative size of hearts and other function-associated organs (liver, spleen, lung, kidney and fat body) in Bufo gargarizans populations from different elevational gradients in a common garden were examined. The results showed that the relative mass of heart, liver, lung, kidney and fat body decreased with the increase of altitude, and this was opposite to the Hesse's rule. However, the pattern of the spleen was consistent with Hesse's rule. These findings imply that ectothermic vertebrates may reduce the levels of energy metabolism to adapt the high altitudinal environments.
2020,39(4): 394-400 收稿日期:2020-01-04
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