Artículo
Spermatogenesis in Leptodactylus chaquensis: Histological study
Iruzubieta Villagra, Ana Lucrecia
; Cisint, Susana Beatriz; Crespo, Claudia Alejandra; Medina, Marcela Fatima; Ramos, Inés del Carmen; Fernandez, Silvia Nelida
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Fecha de publicación:
11/2012
Editorial:
Cambridge University Press
Revista:
Zygote
ISSN:
0967-1994
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The organization and the histological characteristics of Leptodactylus chaquensis testis throughout the reproductive cycle were analyzed in the presented study. Gonads of adult males, processed with routine techniques for optical microscopy, revealed that during the reproductive period the seminiferous tubules were characterized by presentation of a large number of cysts, germ cells at the same maturation stage supported by Sertoli cells. All the germ line cells were also present in the postreproductive period and maintained their morphological characteristics. Primary spermatogonia were large-sized cells found isolated or in small groups. The rest of the cells of the germ line formed cysts. Secondary spermatogonia showed morphological characteristics similar to their predecessors, although they were smaller. Primary and secondary spermatocytes showed images of the different stages of the first and second meiotic division respectively. One finding was the presence of intercytoplasmic bridges between the secondary spermatocytes. Primary spermatids were rounded cells with an acrosomal vesicle associated with the nucleus and had cysts that were characterized by large intercellular spaces. Secondary spermatids were elongated cells with a well defined acrosome, which in the spermatozoa had the shape of an arrowhead. Another peculiar characteristic of this species was the fusion of the walls of the seminiferous tubule with the efferent duct that formed a path for spermatozoa during spermiation. The presence in the seminiferous tubules of all stages of the spermatogenic line during the two periods of the cycle studied indicated that Leptodactylus chaquensis had a potentially continuous reproductive cycle.
Palabras clave:
Amphibians
,
Histology
,
Spermatogenesis
,
Testis
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(INSIBIO)
Articulos de INST.SUP.DE INVEST.BIOLOGICAS
Articulos de INST.SUP.DE INVEST.BIOLOGICAS
Citación
Iruzubieta Villagra, Ana Lucrecia; Cisint, Susana Beatriz; Crespo, Claudia Alejandra; Medina, Marcela Fatima; Ramos, Inés del Carmen; et al.; Spermatogenesis in Leptodactylus chaquensis: Histological study; Cambridge University Press; Zygote; 22; 3; 11-2012; 291-299
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