期刊
CHEMICAL SENSES
卷 37, 期 3, 页码 279-292出版社
OXFORD UNIV PRESS
DOI: 10.1093/chemse/bjr106
关键词
sucrose preference; taste; temperature; water-restriction
资金
- National Institute on Deafness and Communication Disorders at the National Institutes of Health [RO1DC-004785, DC-010110, NIDCD 04607, 1F31DC-009920, DC000044]
The role of diet temperature in ingestive behavior is poorly understood. We examined the importance of stimulus temperature and water-restriction state on the preference for and intake of water and sucrose. Using custom-designed equipment that allows us to monitor and maintain solution temperatures during testing (+/- 0.1 degrees C), we conducted a series of 2-bottle preference tests (10 degrees C water vs. sucrose 10-40 degrees C) and brief access tests (10-40 degrees C water and sucrose). Water-restricted rats preferred cold water over any sucrose concentration (0.0-1.0 M) if the sucrose was 30 or 40 degrees C, whereas the same rats preferred sucrose at all concentrations and temperatures when unrestricted suggesting that the water-restriction state interacts with temperature preference. In a series of brief-access tests using a Davis Rig (MS-180), rats reduced licking to cold sucrose compared with 20 degrees C sucrose, suggesting that unlike water, cold temperature reduced the palatability of sucrose.
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