Li X T, Wang Y, Lu S S, Li M, Men S K, Bai Y C, Tang X L, Chen Q
School of Life Sciences, Lanzhou University, Lanzhou, China.
Cryo Letters. 2017 May/Jun;38(3):216-227.
Phrynocephalus erythrurus living at Qinghai-Tibet Plateau, is believed to be the highest lizard in the world, but we know little about how these lizards cope with very low temperatures in winter.
The aim of this study was to find the difference of the lizards before and after cold acclimatization.
In this study the limit of supercooling and inoculative freezing, the concentration of four organic osmolytes, and the activity of lactate dehydrogenase in the plasma were measured in samples shortly after capture and in other samples after 78 weeks of acclimatization at 24 degree C.
Animals acquired an ability to undergo deeper supercooling and inoculative freezing through the course of acclimatization. We find no regular changes of the four organic osmolytes after the acclimatization.
We think that this species of lizard is partly freeze-tolerant and conclude that it uses supercooling to survive in winter.
生活在青藏高原的红尾沙蜥被认为是世界上分布海拔最高的蜥蜴，但我们对这些蜥蜴如何应对冬季的低温知之甚少。
本研究旨在找出蜥蜴在冷驯化前后的差异。
在本研究中，测量了捕获后不久的样本以及在2至4摄氏度下驯化7至8周后的其他样本的过冷却极限和接种冷冻温度、四种有机渗透剂的浓度以及血浆中乳酸脱氢酶的活性。
通过驯化过程，动物获得了更深程度过冷却和接种冷冻的能力。我们发现驯化后四种有机渗透剂没有规律性变化。
我们认为这种蜥蜴具有一定的耐冻能力，并得出结论，它利用过冷却来度过冬季。
