Water restriction and fluid temperature alter preference for water and sucrose solutions

Chem Senses. 2012 Mar;37(3):279-92. doi: 10.1093/chemse/bjr106. Epub 2011 Nov 22.

Abstract

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 °C), we conducted a series of 2-bottle preference tests (10 °C water vs. sucrose 10-40 °C) and brief access tests (10-40 °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 °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 °C sucrose, suggesting that unlike water, cold temperature reduced the palatability of sucrose.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • Cluster Analysis
  • Cold Temperature
  • Food Preferences / physiology*
  • Male
  • Rats
  • Rats, Sprague-Dawley
  • Sucrose / metabolism*
  • Taste / physiology
  • Temperature*
  • Water / physiology*

Substances

  • Water
  • Sucrose