Organização celular dos testículos em Hylidae e leptodactylidae, no Pantanal (Estado do Mato Grosso do Sul, Brasil)
Carregando...
Arquivos
Data
2009-09-18
Autores
Ferreira, Adelina
Rosa, Ana Barbara Dos Santos
Mehanna, Mahmoud [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
The objective of this work was to make a comparative analysis of germ cell organization at different stages of cellular differentiation in adult males of Dendropsophus nanus (Boulenger, 1889), Pseudis limellum (Cope, 1862), P. paradoxa (Linnaeus, 1758), and Scinax acuminatus (Cope, 1862), belonging to the family Hylidae; and Leptodactylus chaquensis (Cei, 1950) and L. podicipinus (Cope, 1862), belonging to the family Leptodactylidae, collected in the Pantanal and in Serra da Bodoquena, Mato Grosso do Sul State, Brazil. The testes were removed and fixed, dehydrated in a graded series of ethanol and embedded in methacrylate glycol resin (Historesin Leica®). The sections were stained by 1% toluidine blue and observed under light microscope. It was detected that all individual of the Hylidae family show, throughout the year, the presence of all germ cell types of spermatogenesis. However, all Leptodactylidae family individuals only show the presence of all germ cell types during the rainy season. The variations of characteristics in seminiferous epithelium organization, as well as the evident difference in the amount of spermatozoa inside the tubules, are evidence that the anurans in this work show different forms of spermatogenesis development throughout the year: the cycle is continuous for the Hylidae family, and discontinuous with explosive release of spermatozoa for the Leptodactylidae family.
Descrição
Palavras-chave
Dendropsophus, Leptodactylus, Pantanal, Pseudis, Scinax, Serra da Bodoquena, Spermatogenesis, 2 hydroxyethyl methacrylate, alcohol, tolonium chloride, animal tissue, Brazil, cell differentiation, comparative study, controlled study, frog, germ cell, histology, male, microscopy, nonhuman, seasonal variation, seminiferous tubule, spermatogenesis, testis, tissue fixation, Anura, Hylidae, Leptodactylidae, Leptodactylus chaquensis, Leptodactylus podicipinus, Nanus, Pseudis paradoxa, Scinax acuminatus
Como citar
Acta Scientiarum - Biological Sciences, v. 31, n. 4, p. 447-452, 2009.