Cognition, Behavior, and Memory
Author: Matias Aleman | Email: matialeman3@gmail.com
Matías Alemán1°, Lautaro Duarte1°2°, Fernando Locatelli1°2°, Nicolás Pírez1°2°
1° Instituto de Fisiología, Biología Molecular y Neurociencias; UBA-CONICET, Argentina
2° Departamento de Fisiología, Biología Molecular y Celular; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires, Argentina
Insects rely on the olfactory system, among other sensory modalities to find food and mate. The olfactory cues that drive different behaviors are expected to have been determined by evolution and thus their neurobiological mechanisms are assumed to depend on hardwired circuits. However, it is well established that learning and memory have a large impact in tuning olfactory guided behaviors. The fly Drosophila melanogaster is one of the models in which the link between olfactory circuits and behavior is best understood. In order to unveil the neural bases of odor guided behavior, big efforts are made to identify attractive, aversive and neutral odors. The main goal of this project is to unveil the effect that exposure to olfactory stimuli during early stages of development has on the olfactory preference during adulthood. Flies were reared in vials with normal food in the presence of either aversive or appetitive odors. After 5 to 7 days after hatching we evaluated their preference for each odorant by means of a behavioral paradigm that allows us to measure innate and acquired odor attractiveness. Changes in the innate valence of the odors were analyzed by comparing treated flies with the corresponding controls. Our results show that the environment where the animals are reared modulates the behavioral response during adulthood. These results provide a novel paradigm to study olfactory memories that resist metamorphosis.