Odor discrimination of "IP 3-" and “cAMP-increasing” odorants in the turtle olfactory bulb |
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Authors: | Makoto Kashiwayanagi Fumiko Nagasawa Kouhei Inamura Kenzo Kurihara |
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Affiliation: | (1) Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060, Japan, JP |
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Abstract: | The ability of the turtle olfactory system to discriminate between various odorants that increase levels of adenosine 3′,5′-cyclic monophosphate (cAMP) and inositol trisphosphate (IP 3) in the olfactory bulb was examined by the cross-adaptation technique and analyzed by multidimensional scaling. The mean values of the degree of discrimination among the IP 3-increasing odorants were higher than those among the cAMP-increasing odorants, and were similar to those between cAMP- and IP 3-increasing odorants, suggesting that the features of the receptors of cAMP-increasing odorants are different from those which respond to IP 3-increasing odorants. Analysis by multidimensional scaling suggested that differences in second messenger pathways are not related to detecting odor quality in the turtle olfactory system. Received: 21 July 1995/Received after revision: 20 October 1995/Accepted: 6 November 1995 |
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Keywords: | Odor discrimination Olfactory bulb cAMP IP3 Cross-adaptation Turtle |
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