Effects of diet quality on phenotypic flexibility of organ size and digestive function in Mongolian gerbils (Meriones unguiculatus)

Effects of diet quality on phenotypic flexibility of organ size and digestive function in Mongolian gerbils (Meriones unguiculatus)
复制标题

饲料质量对沙鼠器官大小表型灵活性和消化功能的影响

DOI:
10.1007/s00360-007-0149-4
复制
发表时间:
2007-03
期刊:
Journal of Comparative Physiology B
影响因子:
--
通讯作者:
--
中科院分区:
其他
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

在进化和生态学的背景下,通过具有特定表型属性的消化系统加工食物的益处与维持和携带消化系统的成本之间存在权衡。在这项研究中,我们测试的假设,消化调节在几个级别可以相互匹配,以满足能量和营养需求的蒙古沙鼠,一个小的granivorous啮齿动物物种,通过使他们适应高品质的饮食稀释苜蓿粉。蒙古沙鼠在稀释的饮食保持代谢能摄入的综合加工反应(IPR),其中包括增加干物质摄入量,肠道容量和率的肠道通过后2周的驯化。肠刷状缘膜水解酶活性下调支持适应性调节假说。缺乏上调的总酶水解能力的稀释饮食表明,更大的质量高纤维饮食的小肠是不是消化或吸收能力的直接指标。重要器官和胴体质量的变化表明,分配给各个器官的能量的数量,从而调节生理功能,以响应饮食的变化。
In the context of evolution and ecology, there is a trade-off between the benefits of processing food through a digestive system with specific phenotypic attributes and the cost of maintaining and carrying the digestive system. In this study, we tested the hypothesis that digestive modulations at several levels can match each other to meet the energy and nutrient demands of Mongolian gerbils, a small granivorous rodent species, by acclimating them to a high-quality diet diluted with alfalfa powder. Mongolian gerbils on the diluted diet maintained metabolizable energy intake by an integrated processing response (IPR), which included increases in dry matter intake, gut capacity and rate of digesta passage after 2-weeks of acclimation. Down-regulation of hydrolytic enzyme activity in the intestinal brush-border membrane supported the adaptive modulation hypothesis. The absence of up-modulation of summed enzyme hydrolytic capacity on the diluted diet indicated that greater mass of small intestine on a high-fibre diet is not a direct indicator of digestive or absorptive capacity. Changes in mass of vital organs and carcass suggested that the amount of energy allocated to various organs and hence physiological functions was regulated in response to diet shift.
DOI: 10.1086/639580
发表时间: 1997-03
期刊: Physiological Zoology
影响因子: --
作者:
D. Afik;B. W. Darken;W. Karasov
通讯作者: D. Afik;B. W. Darken;W. Karasov
DOI: --
发表时间: 1992
期刊: --
影响因子: --
作者:
T. Tomasi;T. Horton
通讯作者: T. Tomasi;T. Horton
鸟类能量学和营养生态学
DOI: 10.1007/978-1-4613-0425-8
发表时间: 1996
期刊: Respiration physiology
影响因子: --
作者:
C. Carey
通讯作者: C. Carey
DOI: 10.1086/322928
发表时间: 2001-09
影响因子: 1.6
作者:
Yan-Xin Pei;Dehua Wang;I. Hume
通讯作者: Yan-Xin Pei;Dehua Wang;I. Hume
DOI: 10.1086/physzool.66.3.30163700
发表时间: 1993-05-01
期刊: PHYSIOLOGICAL ZOOLOGY
影响因子: --
作者:
HUME, ID;MORGAN, KR;KENAGY, GJ
通讯作者: KENAGY, GJ