FINE-STRUCTURAL STUDY OF THE ACROSOME FORMATION IN THE STARFISH MARTHASTERIAS-GLACIALIS (ECHINODERMATA, ASTEROIDEA)

• Tipo: Artigo em Revista Científica Internacional
• Data: 1988

Autores

sousa, m (Autor) ICBAS; AZEVEDO, C (Autor) Outra

Revista

Título: TISSUE & CELL

Vol. 20

Páginas: 621-628

ISSN: 0040-8166

Editora: CHURCHILL LIVINGSTONE

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 1 Citação

Outras Informações

ID Authenticus: P-001-TSF

DOI: 10.1016/0040-8166(88)90063-8

Abstract (EN): The fine structure of the spermatogenic cells in the starfish Marthasterias glacialis was studied regarding acrosome formation. The main finding in the spermatogenesis of M. glacialis is that the formation of the pro-acrosomal vesicles seems to be initiated in late spermatogonia. Small dense bodies resulting from the division of large granulofibrillar masses were also observed in the cytoplasm of late spermatogonia. During spermiogenesis the inner acrosomal vesicle membrane becomes coated first with dense materials originated from the cytoplasmic dense bodies and then with cisternae of endoplasmic reticulum. Both coating materials are incorporated in the periacrosomal space of the mature acrosome. Besides being involved in the genesis of the periacrosomal material, cytoplasmic dense bodies were also seen in close relationship with intercellular bridges and midpiece structures of spermatids. These findings are discussed in comparison with other echinoderm spermatogenesis. © 1988.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8