Role of photoperiod on hormone concentrations and adaptive capacity in tree shrews, Tupaia belangeri

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• 作者：Lin Zhang ; Wanlong Zhu ; Zhengkun Wang
• 关键词：Cytochrome C oxidase (COX) ; Energy intake ; Hormone ; Nonshivering thermogensis (NST) ; Resting metabolic rate (RMR) ; Uncoupling protein 1 (UCP 1) ; Tupaia belangeri
• 刊名：Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology
• 出版年：2012
• 出版时间：November, 2012
• 年：2012
• 卷：163
• 期：3-4
• 页码：253-259
• 全文大小：351 K

文摘

Environmental factors, such as photoperiod and temperature, play an important role in the regulation of an animal's physiology and behavior. In the present study, we examined the effects of short photoperiod (SD, 8 L:16D) on body mass as well as on several physiological, hormonal, and biochemical measures indicative of thermogenic capacity, to test our hypothesis that short photoperiod stimulates increases thermogenic capacity and energy intake in tree shrews. At the end, these tree shrews (SD) had a significant higher body mass, energy intake, cytochrome C oxidase (COX) activity and uncoupling protein-1 (UCP1) content, serum tri-iodothyronine (T₃) and thyroxine (T₄) compared to LD (16 L:8D) tree shrews. However, there were no significant differences in serum leptin and melatonin between the two groups. Together, these data suggest tree shrews employ a strategy of maximizing body growth and increasing energy intake in response to cues associated with short photoperiod.