关键词: 长爪沙鼠, 产后发育, 肝线粒体, 棕色脂肪组织

Abstract: The present paper has showed that the levels of respiratory rate，oxidative phosphorylation and cytochrome oxidase activity of liver mitochondrla at first day after birth in Clawed jird were the same as those of 30 days old. Protein contents of the liver mitoehondria increased with developmental stage by about 20 days and mitochondria -produced energy was enhanced with growth by that time. Thismightbeone of the cellular mechanism of therrnoregulation in Clawed jird. The changes of cy ochrome oxidase activlty and succinate oxidase activity of brown adipose tissue mitochondrie displayed that brown adipose tissue played an important role in thermoregulation of neonatal.

Key words: Clawed jird Meriones unguiculafus postnatal development 1iver mitochondria、brown adipose tissue。