Co-option and adaptation of novel gene duplications for pheromone activity in a dusky salamander.

Pheromone;Desmagnathus oloec;Plethodontid salamander;Sodefrin precursor-like factor

Kari Anne Leichty, 1987-

University:University of Louisville

Department:Biochemistry and Molecular Biology

关键词: Pheromone;    Desmagnathus oloec;    Plethodontid salamander;    Sodefrin precursor-like factor;   

Others  :  https://ir.library.louisville.edu/cgi/viewcontent.cgi?article=1813&context=etd

美国|英语

来源: The Universite of Louisville's Institutional Repository

【 摘 要 】

For more than a hundred million years, male plethodontid salamanders haveutilized non-volatile, proteinaceous courtship pheromones to regulate female matingreceptivity and promote mating success. These pheromones - which are delivered aftercourtship has commenced and do not act as chemical attractants - are delivered from amale's submandibular (mental) gland to the female salamander either by an olfactorymode or transdermally. For approximately 20 years, research on plethodontid courtshippheromones has focused on those involved in olfaction, using the red-legged salamander(Plethodon shermani) as a model. However, the olfactory system is a relatively recentadaptation (~20 million years ago) employed only by a single clade of large easternPlethodon species. In contrast, for the majority of plethodontids (~350/380 species) themale scratches the back of the female with hypertrophied premaxillary teeth and rubs hisgland over the abraded site to transdermally deliver pheromones. Desmognathus ocoeehas served as the model for transdermal delivery, however less is known about thisspecies. The purpose of this study was to evaluate the hypothesis that sexual selectionhas favored unique pheromone composition and structural motifs in different modes ofpheromone delivery.