摘要
早春季节对布氏田鼠（Microtusbrandti）施以不同光照和温度处理，其血清甲状腺素（T4）含量没有明显变化；低温明显地升高了三碘甲腺原氨酸（T3）的含量和T3／T4的比率。短光照只在低温环境中能升高T3／T4的比率。秋节温暖环境中的短光照或褪黑激素（Melatonin，MLT）处理，都能升高血清T3的浓度和增加T3／T4的比率。表明甲状腺激素在布氏田鼠短光照和低温的适应性产热中起着重要的调控作用，褪黑激素诱导布氏田鼠产热与甲状腺激素有密切的联系。
Brandt's vole used in the study is a kind of dominant rodent in the grassland of lnner Mongolia. in early spring, serum thyroxine (T4) content in Brandt's vole was not remarkably inflenced by different photoperiod and temperatre. Serum triiodothyronine(T3) concentration and ratio of T3 to T4 increased significantly by cold acclimaion (5 ±2℃ ). Short days (8L: 16D) indtlced the increase of the raho ouly in dle cold. ln fall, the vole maintained at short days(10L: 14D) and warm temperature (23 ± 2℃ ) or injected subcutaneously 12. 3 μg of melatonin had higher serum T3 content and ratio of T3 to T4 than that at long days. The results suggsted tha the thyroid hormone plays an important role in regulating adaptive thermogenesis of short photoperiod and cold Brandt's vole.
出处
《四川动物》
CSCD
1997年第1期27-30,共4页
Sichuan Journal of Zoology
关键词
布氏田鼠
温度
甲状腺激素
适应性产热
Microtus brandti temperature melatonin thyroid hormone adoptive thermogenesis
