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Plant secondary metabolites as mammalian feeding deterrents: Separating the effects of the taste of salicin from its post-ingestive consequences in the common brushtail possum (Trichosurus vulpecula)

Citation

Pass, GJ and Foley, WJ, Plant secondary metabolites as mammalian feeding deterrents: Separating the effects of the taste of salicin from its post-ingestive consequences in the common brushtail possum (Trichosurus vulpecula), Journal of Comparative Physiology Part B, 170, (3) pp. 185-192. ISSN 0174-1578 (2000) [Refereed Article]


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The final publication is available at http://www.springerlink.com

Official URL: http://www.springerlink.com

DOI: doi:10.1007/s003600050274

Abstract

The effect of the phenolic glycoside, salicin, on food intake of the common brushtail possum (Trichosurus vulpecula) was studied in a series of feeding experiments. Increasing the concentration of salicin in a diet of fruits and cereals led to significant reductions of food intake in the short term (6 days). After prolonged (20 days) exposure to salicin, food intake (19 g kg−0.75 day−1) was still reduced relative to controls (31 g kg−0.75 day−1) but not reduced to the same extent as in the short-term experiments. Nonetheless, over these 20 days, common brushtail possums regulated their intake of salicin so as not to exceed a threshold limit of 1.9  0.1 g kg−0.75 day−1. Manipulative experiments sought to determine whether this threshold intake was in response to pre-ingestive factors (taste) or the post-ingestive consequences of ingesting salicin. Dietary salicin (0.175.0% DM) had no significant effect on nitrogen balance or urea metabolism and injection of a specific serotonin receptor antagonist, ondansetron, did not lead to increases in salicin intake as has been found for some other plant secondary metabolites. Similarly, administration of 1.3 g salicin by gavage had no significant effect on the subsequent intake of salicin compared to controls that were gavaged with water. We concluded that pre-ingestive factors were responsible for common brushtail possums limiting their intake of salicin-rich diets rather than any measurable post-ingestive consequence of feeding.

Item Details

Item Type:Refereed Article
Keywords:Phenolic glycoside - Jensenone - Antifeedant - Marsupial - Detoxification
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Terrestrial Ecology
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Forest and Woodlands Flora, Fauna and Biodiversity
Author:Pass, GJ (Ms Georgia Jane Pass)
ID Code:19819
Year Published:2000
Web of Science® Times Cited:38
Deposited By:Pharmacy
Deposited On:2000-08-01
Last Modified:2013-12-11
Downloads:0

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