Wa. Partata et al., Distribution of glycogen phosphorylase and cytochrome oxidase in the central nervous system of the turtle Trachemys dorbigni, COMP BIOC A, 124(2), 1999, pp. 113-122
Citations number
25
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Animal Sciences",Physiology
Journal title
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR AND INTEGRATIVE PHYSIOLOGY
Glycogen phosphorylase (GP) and cytochrome oxidase (CO) activities were map
ped histochemically in the brain of the turtle Trachemys dorbigni. In the t
elencephalon, both activities occurred in the olfactory bulb, in all cortic
al areas, in the dorsal ventricular ridge, striatum, primordium hippocampi
and olfactory tubercle. In the diencephalon, they were identified in some a
reas of the hypothalamus, and in rotundus and geniculate nuclei. Both react
ions were detected in the oculomotor, trochlear, mesencephalic trigeminal n
uclei, the nucleus of the posterior commissure, torus semicircularis, subst
antia nigra and ruber and isthmic nuclei of the mesencephalon. In all layer
s of the optic tectum GP activity was found, but CO only labelled the strat
um griseum centrale. In the medulla oblonga both enzymes appear in the reti
cular, raphe and vestibular nuclei, locus coeruleus and nuclei of cranial n
erves. In the cerebellum, the granular and molecular layers, and the deep c
erebellar nuclei were positive for both enzymes. The Purkinje cells were on
ly reactive for CO. In the spinal cord, motor and commissural neurones exhi
bited a positive reaction for the two enzymes. However, CO also occurred in
the marginal nucleus and in the lateral funiculus. These results may be us
eful as a basis for subsequent studies on turtle brain metabolism. (C) 1999
Elsevier Science Inc. All rights reserved.