The chemoreceptor spike activity in response to sucrose in the concentration range 1-500 mM was recorded from each of the 11 Intermediate and 13 Large labellar sensilla in the blowfly Protophormia terraenovae. The results showed that: (1) three of the four cells present in each sensillum are activated by sucrose stimulation; (2) differences between the Large and Intermediate types exist in the dose-response profiles of one of these cells (the 'water' cell), possibly reflecting different sugar receptor site populations on the dendritic membranes of homologous cells in the two types; (3) sensilla of both types are differentially responsive to sucrose solutions according to their location on the labellum. These differences may provide elements for a spatial representation of the stimulus source within the sensory coding process.

Sugar response differences related to sensillum type and location on the labella of Protophormia terraenovae: A contribution to spatial representation of the stimulus.

LISCIA, ANNA MARIA;SOLARI, PAOLO;TOMASSINI BARBAROSSA, IOLE;CRNJAR, ROBERTO MASSIMO
1998-01-01

Abstract

The chemoreceptor spike activity in response to sucrose in the concentration range 1-500 mM was recorded from each of the 11 Intermediate and 13 Large labellar sensilla in the blowfly Protophormia terraenovae. The results showed that: (1) three of the four cells present in each sensillum are activated by sucrose stimulation; (2) differences between the Large and Intermediate types exist in the dose-response profiles of one of these cells (the 'water' cell), possibly reflecting different sugar receptor site populations on the dendritic membranes of homologous cells in the two types; (3) sensilla of both types are differentially responsive to sucrose solutions according to their location on the labellum. These differences may provide elements for a spatial representation of the stimulus source within the sensory coding process.
1998
Blowfly, Taste, Sugar receptor, Water receptor, Neural coding
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/1113
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