A comparative ultrastructural study of the pecten oculi in adult, juvenile, and nestling yellow‐legged gulls, Larus michahellis (Naumann, 1840)
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Título: | A comparative ultrastructural study of the pecten oculi in adult, juvenile, and nestling yellow‐legged gulls, Larus michahellis (Naumann, 1840) |
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Autor/es: | Segovia, Yolanda | Victory, Noemí | Navarro-Sempere, Alicia | Pinilla, Vanessa | García, Magdalena |
Grupo/s de investigación o GITE: | Grupo de Inmunología, Biología Celular y del Desarrollo |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Biotecnología |
Palabras clave: | Avian eye | Ecomorphology | Pigmented stromal cells | Ultrastructure of capillaries | Visual ecology |
Área/s de conocimiento: | Biología Celular |
Fecha de publicación: | ene-2020 |
Editor: | Wiley |
Cita bibliográfica: | Veterinary Ophthalmology. 2020, 23(1): 113-122. doi:10.1111/vop.12695 |
Resumen: | This study aimed at examining the histological structure of the pecten oculi in the adult yellow‐legged gull, Larus michahellis, and at two moments of postnatal development: during the posthatch (nestling) and juvenile periods. Particular attention was paid to differences in the diameter of vessels, the thickness of the basement membrane, and ultrastructural features of endothelial and pigmented stromal cells. Capillary endothelial cells displayed numerous microvillous‐like folds projecting from their internal and external surfaces. Intercellular spaces between capillaries were occupied by pigmented stromal cells. The ultrastructure of pecten oculi underwent noticeable changes during postnatal development. The examination of the capillaries in nestlings, juveniles, and adults revealed that the formation process of vessels and pigmented stromal cells did not complete itself in the posthaching phase. The prominent feature of endothelial cells of capillaries in nestlings was that the microvilli were longer than in juvenile and adult cells, and the capillary lumen was therefore reduced. In this sense, their pigmented stromal cells showed fewer melanosomes, lacked intercellular spaces, and cellular junctions could still be observed. These results provide evidence that the pecten oculi during the posthatching phase maintains immature morphological features consistent with a role of pigmented stromal cells in the blood‐retina barrier. |
Patrocinador/es: | This research was supported by the University of Alicante VIGROB‐186 and UAUSTI16‐06 grants. |
URI: | http://hdl.handle.net/10045/101377 |
ISSN: | 1463-5216 (Print) | 1463-5224 (Online) |
DOI: | 10.1111/vop.12695 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2019 American College of Veterinary Ophthalmologists |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1111/vop.12695 |
Aparece en las colecciones: | INV - Grupo de Inmunología - Artículos de Revistas |
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2020_Segovia_etal_VeterinaryOphthalmology_final.pdf | Versión final (acceso restringido) | 2,15 MB | Adobe PDF | Abrir Solicitar una copia |
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