Premeiotic transformation of germ plasm-related structures during the sea urchin spermatogenesis.
Zygote
; 21(1): 95-101, 2013 Feb.
Article
en En
| MEDLINE
| ID: mdl-21791161
The germ plasm-related structures (GPRS) and the transformation that occurs to them during the spermatogenesis of the sea urchin Anthocidaris crassispina were studied by electron microscopy and morphometry. The GPRS were observed in spermatogonia and spermatocytes, but not in spermatids and sperm, which suggests an important role for these structures during the onset of meiosis. It was proposed that the germinal granules are fragmented into the compact electron-dense nuage, and fragments of the latter penetrate into the periphery of the compact electron-lucent nuage. The process of nuage integration is completed with the formation of the combined nuage, which aggregates some mitochondria into clusters. Once formed, the mitochondrial clusters undergo dissemination and assume the appearance of the dispersed nuage with mitochondrial derivatives, which in turn develops into the scattered nuage. The scattered nuage, which presumably presents the composite mixture saturated with mitochondrial matrix, terminates the GPRS transformation.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Espermatogénesis
/
Espermatozoides
/
Anthocidaris
Límite:
Animals
Idioma:
En
Revista:
Zygote
Asunto de la revista:
EMBRIOLOGIA
Año:
2013
Tipo del documento:
Article
País de afiliación:
Rusia
Pais de publicación:
Reino Unido