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

• Type: Article in International Scientific Journal
• Date: 1988

Authors

sousa, m (Author) ICBAS; AZEVEDO, C (Author) Other

Journal

Title: TISSUE & CELL

Vol. 20

Pages: 621-628

ISSN: 0040-8166

Publisher: CHURCHILL LIVINGSTONE

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 1 Citation

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8