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季节性模拟对大绒鼠能量代谢的影响
Effect of Seasonal Simulation on Energy Metabolism of Eothenomys miletus
杨涛1, 付家豪1, 陈金龙2, 叶芳艳1, 左木林1, 侯东敏1, 朱万龙1*
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作者单位:1. 云南省高校西南山地生态系统动植物生态适应进化及保护重点实验室, 云南师范大学生命科学学院, 昆明 650500;
2. 昆明市海口林场, 昆明 650114
中文关键字:大绒鼠;季节模拟;能量代谢;瘦素
英文关键字:Eothenomys miletus; seasonal simulation; energy metabolism; leptin
中文摘要:本实验主要阐明大绒鼠Eothenomys miletus在季节性模拟过程中体质量调节和能量代谢的变化。实验组大绒鼠在模拟夏季环境中(25℃,16L:8D)驯化14 d后转入模拟冬季环境中(5℃,8L:16D)驯化8 d,实验中每隔1 d测定大绒鼠的体质量、摄食量,每隔7 d测定其静止代谢率,实验结束后测定体脂含量和血清瘦素浓度。结果表明:季节性模拟条件下大绒鼠的体质量变化差异具有统计学意义(F=1.911,P<0.05),22 d后实验组体质量比对照组下降12.54%;摄食量变化差异具有高度统计学意义(F=8.850,P<0.01),22 d后实验组摄食量比对照组显著增加58.23%;静止代谢率变化差异具有高度统计学意义(F=9.969,P<0.01),22 d后实验组比对照组显著增加82.22%;体脂含量和血清瘦素浓度呈显著正相关。以上实验结果表明:大绒鼠在模拟夏季转冬季的过程中主要通过降低体质量、增加摄食量和产热等来适应冷环境的胁迫。此外,瘦素有可能参与了大绒鼠在该环境下的体质量调节。
英文摘要:In order to investigate the body mass regulation and energy metabolism of Eothenomys miletus during seasonal simulation, E. miletus were fed in the simulated summer condition (25℃, 16L:8D) for two weeks and then transferred to simulated winter condition (5℃, 8L:16D) for 8 days. Subsequently, body mass and food intake were measured every two days, resting metabolic rate (RMR) was measured every 7 days, body fat mass and serum leptin level were measured at the end of the experiment. The results showed that body mass were significantly different (F=1.911, P<0.05) under seasonal simulation. Especially on day 22, body mass decreased 12.54% compared with that on day 0. The values of food intake were extreme significantly different (F=8.850, P<0.01) under seasonal simulation, which increased 58.23% on day 22 compared with that on day 0. Seasonal simulation also affected RMR extreme significantly (F=9.969, P<0.01), which increased 82.22% on day 22 compared with that on day 0. Body fat mass was positively correlated with the serum leptin level. The results suggested that E. miletus adopted to cold condition mainly by reducing body mass, increasing food intake and thermogenesis. Moreover, serum leptin levels may be involved in the body mass regulation of E. miletus.
2016,(35): 414-420 收稿日期:2016-01-09
DOI:10.11984/j.issn.1000-7083.20160013
分类号:Q959.837;Q955
基金项目:国家自然科学基金项目(31260097,31560126)
作者简介:杨涛(1991-),女,硕士研究生,研究方向:动物生理生态,E-mail:310280627@qq.com;付家豪(1991-),男,硕士研究生,研究方向:动物生理生态,E-mail:542816724@qq.com
*通讯作者:朱万龙,男,副教授,研究方向:动物生理生态,E-mail:zwl_8307@163.com
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