The shift of thermoneutral zone in striped hamster acclimated to different temperatures.
The shift of thermoneutral zone in striped hamster acclimated to different temperatures.
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DOI：
10.1371/journal.pone.0084396
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Wang DH
中科院分区：
文献类型：
--
作者：
Zhao ZJ;Chi QS;Liu QS;Zheng WH;Liu JS;Wang DH
温度影响所有生物功能，因此将调节动物与其环境之间具有生态意义的相互作用。在这里，我们研究了环境温度（Ta）对适应冷（5°C）、暖（21°C）和热温度（31°C）的条纹仓鼠的热生物学和能量收支的影响。在冷、温和热驯化的仓鼠中，热中性区（TNZ）分别为22.5-32.5°C、25-32.5°C和30-32.5°C。冷驯化降低了低温临界温度，使TNZ变宽，热驯化提高了低温临界温度，使TNZ变窄。在TNZ，冷驯化仓鼠表现出显着较高的代谢率和产热比那些适应高温。肠道蔗糖酶、麦芽糖酶、L-丙氨酸氨基肽酶-N和亮氨酸氨基肽酶等消化酶的活性在冷时高于热时。不同温度下的代谢率和产热变化与棕色脂肪组织细胞色素c氧化酶活性和解偶联蛋白1基因表达水平的变化相一致。这表明TNZ临界低温的变化可能与消化道的代谢和产热速率以及消化道在不同Ta下的消化能力有关。TNZ的上临界温度可能与Ta的变化无关。改变TNZ的下临界温度是其适应Ta变化的重要策略。
Temperature affects all biological functions and will therefore modulate ecologically significant interactions between animals and their environment. Here, we examined the effect of ambient temperature (Ta) on the thermal biology and energy budget in striped hamsters acclimated to cold (5°C), warm (21°C) and hot temperatures (31°C). Thermoneutral zone (TNZ) was 22.5–32.5°C, 25–32.5°C and 30–32.5°C in the cold-, warm- and hot-acclimated hamsters, respectively. The cold acclimation decreased the lower critical temperature and made the TNZ wider, and hot exposure elevated the lower critical temperature, resulting in a narrow TNZ. Within the TNZ, cold-acclimated hamsters showed a significantly higher rate of metabolism and thermogenesis than those acclimated to hot temperature. Digestive enzymes activities, including intestinal sucrase, maltase, L-alanine aminopeptidase-N and leucine aminopeptidase were higher in the cold than in the hot. The changes in metabolic rate and thermogenesis at different temperatures were in parallel with cytochrome c oxidase activity and uncoupling protein 1 gene expression of brown adipose tissue. This suggests that the shift of the lower critical temperature of TNZ is possibly associated with the rate of metabolism and thermogenesis, as well as with the digestive capacity of the gastrointestinal tract at different Ta. The upper critical temperature of TNZ may be independent of the changes in Ta. The changes of lower critical temperature of TNZ are an important strategy in adaption to variations of Ta.
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DOI：
10.1007/bf00304134
发表时间：
1971-01-01
期刊：
ZEITSCHRIFT FUR VERGLEICHENDE PHYSIOLOGIE
影响因子：
--
作者：
HELDMAIER, G
通讯作者：
HELDMAIER, G
DOI：
10.1007/s00360-010-0506-6
发表时间：
2011-01-01
影响因子：
2
作者：
Chi, Qing-Sheng;Wang, De-Hua
通讯作者：
Wang, De-Hua
影响因子：
3.5
作者：
HELDMAIER, G;STEINLECHNER, S;KLINGENSPOR, M
通讯作者：
KLINGENSPOR, M
影响因子：
2.8
作者：
Brzek, Pawel;Kohl, Kevin;Karasov, William H.
通讯作者：
Karasov, William H.
DOI：
10.1086/physzool.63.5.30152625
发表时间：
1990-09-01
期刊：
PHYSIOLOGICAL ZOOLOGY
影响因子：
--
作者：
DELRIO, CM
通讯作者：
DELRIO, CM