摘要
布氏田鼠（Ｍｉｃｒｏｔｕｓ ｂｒａｎｄｔｉ）分组驯化在：（１）长光照温暖环境（ＬＷ，１６Ｌ：８Ｄ，２５℃）；（２）长光照 低温环境（ＬＣ，１６Ｌ：８Ｄ，５℃）；（３）短光照温暖环境（ＳＷ，８Ｌ：１６Ｄ，２５℃）；（４）短光照低温环境（ＳＣ， ８Ｌ：１６Ｄ，５℃）。驯化四周后，长光照动物的体重比短光动物的体重有增加的趋势；四组动物的体温 没有明显差异；低温和短光照均促使静止代谢率（ＲＭＲ）增加；ＳＣ组动物的非颤抖性产热（ＮＳＴ）高 于ＬＷ组。低温诱导肝和褐色脂肪组织（ＢＡＴ）细胞线粒体蛋白增加，短光照再度地增强此作用。短 光照诱导肝细胞线粒体状态－４及状态－３呼吸活力增加，低温没有明显作用。低温和短光照均刺激肝 和ＢＡＴ线粒体细胞色素Ｃ氧化酶活力提高，但后者作用强度大于前者。低温明显激活ＢＡＴ线粒体 的ａ－磷酸甘油氧化酶的活力，短光照无明显影响、结果表明：低温和短光照均能提高布氏田鼠的产 热能力，短光照与低温因子两者的协同作用增强了对布氏四鼠热能代谢的调节。
The influence of photoperiod and ambient temperature on resting oxygen consumption (RMR), nonshivering thermogenesis (NST) and cellular biochemistry was determined by acclimating Brandt's voles to 4-week treatments of controlled photopreiod and temperature. Four treatments were employed: l) long days and warm (LW), 16L: 8D, 25± l℃, 2) long days and cold (LC), .16L: 8D, 5±20℃, 3) short days and warm (SW), 8L : 16D, 25± I℃, 4) short days and cold (SC), 8L: 16D, 5±2. Body temperatures of voles were uninfluenced by the treatments, but they weights of LW and LC groups, compared with SW and SC groups, showed increasing tendency. Cold temperature and/or short days induced an increase of RMR. NST of SC group was higher than that of LW group. Cold acclimation induced a rise in protein content and an increase in cytochrome C oxidase activity of liver and BAT mitochondria. Short photoperiod further enhanced these reactions, and resulted in the increase of state-3 andstate-4 respiration of liver mitochondria. Cold acclimation significantly stimulated the activity of a- glycerophosphate oxidase of BAT mitochondria. These results indicate that thermogenic capacities of Brandt's voles are strongly influenced by photoperiod or temperature, and coordinated action of both short days and cold temperature enhances thermogenic regulation of Brandt's voles.
出处
《动物学报》
SCIE
CAS
CSCD
1995年第4期362-369,共8页
ACTA ZOOLOGICA SINICA
基金
国家自然科学基金资助项目
资助编号:39270118
关键词
布氏田鼠
温度
光周期
产热
Photoperiod, Cold temperature, Brandt's vole, Nonshivering thermogenesis, Mitochondria.
