Electrophysiological responses of taste-receptor cells to various feeding stimulants, deterrents, and their interactions in gypsy moth larvae, Lymantria dispar (L.)
MetadataShow full item record
Type of Workapplication/pdf
vi, 55 pages
DepartmentTowson University. Department of Biological Sciences
RightsCopyright protected, all rights reserved.
There are no restrictions on access to this document. An internet release form signed by the author to display this document online is on file with Towson University Special Collections and Archives.
Gypsy moth larvae are highly polyphagous feeders. They possess taste sensory organs, the medial and lateral galeal styloconic sensilla, which play an important role in host-plant selection through the detection of phytochemicals, such as alkaloids. The styloconic sensilla each house four taste receptor cells, including a sugar, salt, deterrent, and inositol cell. Using a single cell electrophysiological tip-recording method, my aim was to characterize the temporal firing patterns and sensitivities of the receptor cells within each sensillum when exposed to a selected phytochemicals. These results revealed that one or more cells responded to selected alkaloids, sugars, sugar alcohols, and salt. The deterrent cell exhibited a robust temporal firing pattern and displayed varying sensitivity to alkaloid stimulation. I also examined the effects of mixture interactions of these phytochemicals on food palatability. This study offers insights into the role of phytochemicals, especially alkaloids, in the taste physiology of this larval insect.