Species-specific circuitry of double cone photoreceptors in two avian retinas.

ABSTRACT: In most avian retinas, double cones (consisting of a principal and accessory member) outnumber other photoreceptor types and have been associated with various functions, such as encoding luminance, sensing polarized light, and magnetoreception. However, their down-stream circuitry is poorly understood, particularly across bird species. Analysing species differences is important to understand changes in circuitry driven by ecological adaptations. We compare the ultrastructure of double cones and their postsynaptic bipolar cells between a night-migratory European robin and non-migratory chicken. We discover four previously unidentified bipolar cell types in the European robin retina, including midget-like bipolar cells mainly connected to one principal member. A downstream ganglion cell reve

SUBMITTER: Gunther A 

PROVIDER: S-EPMC11325025 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature