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J Insect Physiol

Title:		Gall midge olfaction: pheromone sensitive olfactory neurons in Contarinia nasturtii and Mayetiola destructor
Author(s):		Boddum T; Skals N; Hill SR; Hansson BS; Hillbur Y;
Address:		"Chemical Ecology, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Sweden. tina.boddum@ltj.slu.se"
Journal Title:		J Insect Physiol
Year:		2010
Volume:		20100428
Issue:		9
Page Number:		1306 - 1314
DOI:		10.1016/j.jinsphys.2010.04.007
ISSN/ISBN:		1879-1611 (Electronic) 0022-1910 (Linking)
Abstract:		"This study describes the morphology and function of the antennal sensilla in two gall midge species, Contarinia nasturtii and Mayetiola destructor, where multi-component sex pheromones have been identified. Both species possess sensilla trichodea, s. coeloconica, s. chaetica and s. circumfila. Sensilla circumfila, which consist of several sensilla that bifurcate and fuse into one structure, are unique for the gall midges. In C. nasturtii s. circumfila are sexually dimorphic. In males, they form elongated loops suspended on cuticular spines, whereas in females they run like worm-like structures directly on the antennal surface. Single sensillum recordings demonstrated that olfactory sensory neurons housed in male s. circumfila in C. nasturtii responded to the female sex pheromone. In M. destructor, s. circumfila were attached to the antennal surface in both sexes, and displayed no response to sex pheromone components. A sexual dimorphism was also found in the number of s. trichodea per antennal segment in both C. nasturtii (male 1 vs. female 7) and M. destructor (male 13 vs. female 10). OSNs located in male M. destructor s. trichodea responded to the sex pheromone. This is the first gall midge single sensillum study, and the first demonstration of the functional significance of s. circumfila"
Keywords:		"Animals Diptera/anatomy & histology/*physiology Electrophysiology Female Male Microscopy, Electron, Scanning Microscopy, Electron, Transmission Sensory Receptor Cells/*metabolism/ultrastructure Sex Attractants/*metabolism *Sex Characteristics Smell/*physi;"
Notes:		"MedlineBoddum, Tina Skals, Niels Hill, Sharon R Hansson, Bill S Hillbur, Ylva eng Research Support, Non-U.S. Gov't England 2010/04/27 J Insect Physiol. 2010 Sep; 56(9):1306-14. doi: 10.1016/j.jinsphys.2010.04.007. Epub 2010 Apr 28"