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Immunocytochemical localization of glycine in the retina of the turtle (Pseudemys scripta)

Published online by Cambridge University Press:  02 June 2009

William D. Eldred  and
Kristin Cheung
William D. Eldred
Affiliation:
Department of Biology, Boston University, Boston
Kristin Cheung
Affiliation:
Department of Biology, Boston University, Boston
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Abstract

We have localized glycine-like immunoreactivity to provide new anatomical detail about glycinergic neurons in the turtle retina. A rabbit antiserum directed against a glycine/albumin conjugate was used with standard fluorescent and avidin-biotin labeling techniques. Some processes in the outer plexiform layer and many processes in the inner plexiform layer, numerous somata in the inner nuclear layer, and isolated somata in the ganglion cell layer were immunoreactive.

The vast majority of labeled neurons were amacrine cells. One class of amacrine cells had well-labeled somata near the inner nuclear/inner plexiform layer border, which gave rise to thick primary processes that entered the inner plexiform layer and arborized near the border of strata 1 and 2 and in stratum 3. A second class of glycinergic neurons, consisting of putative interplexiform cells, was unique in that it gave rise to dendritic arborizations in both the outer plexiform layer and the inner plexiform layer. Some of the immunoreactive neurons in the ganglion cell layer were apparently displaced amacrine cells, while others were probably true ganglion cells because they gave rise to labeled axons, and many labeled axons were visible in the ganglion cell axon layer. These results suggested that glycine played an extensive role in the turtle retina, and that it was involved in many diverse synaptic interactions in both the outer plexiform layer and the inner plexiform layer.

Keywords

GlycineImmunocytochemistryRetinaTurtle
Type
Research Article
Information
Visual Neuroscience , Volume 2 , Issue 4 , April 1989 , pp. 331 - 338
Copyright
Copyright © Cambridge University Press 1989

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