Development of the eye in the turbot Psetta maxima (Teleosti) from hatching through metamorphosis.

Autor: de Miguel Villegas E; Laboratory of Cell Biology, Department of Fundamental Biology, University of Vigo, 36200 Vigo, Spain., Dans MJD; Laboratory of Cell Biology, Department of Fundamental Biology, University of Vigo, 36200 Vigo, Spain., Paz-Andrade Castillo C; Laboratory of Cell Biology, Department of Fundamental Biology, University of Vigo, 36200 Vigo, Spain., Alvarez RA; Laboratory of Citology and Histology, Department of Fundamental Biology, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain.
Jazyk: angličtina
Zdroj: Journal of morphology [J Morphol] 1997 Jul; Vol. 233 (1), pp. 31-42.
DOI: 10.1002/(SICI)1097-4687(199707)233:1<31::AID-JMOR3>3.0.CO;2-R
Abstrakt: Development of the eyes during the larval and metamorphic stages of the turbot Psetta maxima (Teleosti) was studied using microscopy. Events during differentiation of both eyes occur simultaneously, and no differences between he migrating and no-migrating eye were observed during metamorphosis. At hatching, the eyes are rudimentary, consisting of a neuroepithelial optic cup and a small lens. During larval development, major changes occur in the lens and retina, in which cones are the only photoreceptors. The appearance of rods is delayed until metamorphosis. The outer ocular layers (sclera and choroid) arise during larval development as thin connective layers with little differentiation. These layers undergo important changes just before and during metamorphosis. These results indicate that development of the individual components of the eye occurs at different times. Those of ectodermal origin appear early, providing a simple visual organ during larval life. By metamorphosis, the eye shows adult characteristics, including two types of photoreceptors, a rich choroid vascular supply and ocular structures involved in protecting, shaping, and moving the eye. J Morphol 233:31-42, 1997. © 1997 Wiley-Liss, Inc.
(Copyright © 1997 Wiley-Liss, Inc.)
Databáze: MEDLINE
Externí odkaz: