IBCN   20355
INSTITUTO DE BIOLOGIA CELULAR Y NEUROCIENCIA "PROFESOR EDUARDO DE ROBERTIS"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Spatial pattern of retinal cones in avian retina ¿a matter of sex or chance?
Autor/es:
LOCATELLI, LUCIANO; PAGANELLI, ALEJANDRA; HEREDIA, JOAQUIN; RÍOS, HUGO; FOSSER, NICOLÁS; RODRIGUEZ, TRINIDAD
Lugar:
CABA
Reunión:
Simposio; Xth Meeting of the Latin American Society for Developmental Biology; 2019
Institución organizadora:
Latin American Society for Developmental Biology
Resumen:
 Spatial pattern of retinal cones in avian retina. Amatter of sex or chance? Fosser,Nicolás; Locatelli Campagno, Luciano; Heredia, Joaquín; Rodríguez Trinidad;Paganelli, Alejandra; Ríos, Hugo.Institutode Biología Celular y Neurociencias (IBCN), Facultad de Medicina, Universidadde Buenos Aires. It is known that there is aspatial pattern of photoreceptors in the retina of vertebrates, which is basedon the spatial distribution, in the plane of the retina, of cones and rods.From this distribution arise the visual functions for an adequate visual acuityand color vision. In many species, this pattern of distribution allows us todistinguish an organization of the "mosaic" type from the differentcones and canes subtypes. The retina of birds has a highly sophisticatedphotoreceptor system consisting of rods and five types of cones. The close relationship betweenthe spatial pattern and the visual function would allow us to associatedifferent organizations in the mosaic pattern of photoreceptors with adifferent animal behavior. The questions that arise are: how do these patternsdevelop? Could be describe these pattern in terms of spatial relationships? Isthere sexual dimorphism in that distribution that explains the differentbehaviors between male and female animals? Our group have been workinglooking for some answers to these previous questions through the analyzes ofcone and rod spatial pattern in a domestic (G. gallus domesticus) and awild bird (Molothrus) species. We perform different morphometricanalyzes to evaluate the quantity, density and diameter of the photoreceptormosaic. We also studied by Western Blot the different opsins of cones andcanes. Finally, a univariate and bivariate statistical analysis was performed.The latter gave us information about the spatial relationship between thedifferent photoreceptors.  Our preliminary datasuggest that, from the point of view of the morphometric, biochemical andspatial distribution, there are only poor significant intraspecific differencesbetween male and female animals. However, these differences are significantwhen an analysis is made between males or females of different species.