ROLE OF PHOTOPERIOD AND MELATONIN IN SEASONAL ACCLIMATIZATION OF THE DJUNGARIAN HAMSTER, PHODOPUS-SUNGORUS
ROLE OF PHOTOPERIOD AND MELATONIN IN SEASONAL ACCLIMATIZATION OF THE DJUNGARIAN HAMSTER, PHODOPUS-SUNGORUS
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DOI：
10.1007/bf02219503
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发表时间：
1982-01-01
影响因子：
3.2
通讯作者：
HELDMAIER, G
中科院分区：
文献类型：
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作者：
STEINLECHNER, S;HELDMAIER, G
准噶尔仓鼠（P.sungorus）的一些产热参数，如非颤抖性产热（NST）和抗寒性，显示出明显的年周期。这些季节变化基本上受光周期自然变化的控制。通过将仓鼠暴露于人工长和短光周期，进一步支持了这一观点。植入褪黑激素在秋季和冬季的结果在增加产热能力在短日照和长日照仓鼠相比，所示的控制仓鼠暴露于短光周期在冬季的值。褪黑激素和短光周期的这种向热作用只能在秋季和冬季发现，而在春季和夏季，褪黑激素，像光周期，没有影响产热能力。褪黑激素和光周期的作用随季节而变化，它们取决于仓鼠的光周期历史。松果体及其激素褪黑激素显然参与调解光周期控制的季节性驯化。
The Djungarian hamster, P. sungorus, shows a clear annual cycle in some thermogenic parameters such as nonshivering thermogenesis (NST) and cold resistance. These seasonal changes were basically controlled by natural changes in photoperiod. Further support for this view was obtained by exposing the hamsters to artificial long and short photoperiods. Implantation of melatonin during fall and winter results in an increased thermogenic capacity in both short and long day hamsters comparable to that shown by values of control hamsters exposed to short photoperiods during winter. This thermotropic action of melatonin and of short photoperiod could be found only in fall and winter whereas during spring and summer, melatonin, like photoperiod, had no influence on thermogenic capacities. The actions of melatonin and photoperiod vary with the season and they depend upon the photoperiodic history of the hamsters. The pineal gland with its hormone melatonin apparently is involved in mediation of photoperiodic control of seasonal acclimatization.