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Issue:ISSN 1000-7083
          CN 51-1193/Q
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Your Position :Home->Past Journals Catalog->2017 Vol.36 No.3

Comparison of Cold Hardiness of Two Toad-headed Lizards from Different Altitudes
Author of the article:LI Xiangtao, WANG Yan, LI Mei, MEN Shengkang, PU Peng, TANG Xiaolong, CHEN Qiang*
Author's Workplace:Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
Key Words:Phrynocephalus erythrurus; Phrynocephalus przewalskii; supercooling capacity; inoculative freezing; heart rate; breathing rate; organic osmolytes
Abstract:Environment has a significant impact on physiological and genetic characteristics of animals, and low temperature is one of the main characteristics of high altitude environment. However, until now, there are few studies on cold hardiness of lizards. In this study, Phrynocephalus erythrurus from Hoh Xil, Qinghai province and P. przewalskii from Minqin county, Gansu province were selected to investigate the cold hardiness of lizards living at different altitudes. The supercooling capacity, the ability to resist inoculative freezing, the heart rate and breathing rate at 4℃ and the concentration of organic osmolytes (such as glucose, urea etc.) were measured. The results showed that the supercooling capacity of the 2 species had no significant difference; while P. erythrurus had a stronger ability to resist inoculative freezing than P. przewalskii. At 4℃, the heart rate and breathing rate of P. erythrurus were higher than those of P. przewalskii. None of the 4 potential organic osmolytes that might be as cryoprotectants in these species.
2017,36(3): 300-305 收稿日期:2017-01-12
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