AN ULTRASTRUCTURAL-STUDY OF CRASSOSTREA-ANGULATA (MOLLUSCA, BIVALVIA) SPERMATOGENESIS

• Type: Article in International Scientific Journal
• Date: 1994

Authors

sousa, m (Author) ICBAS; OLIVEIRA, E (Author) Other

Journal

Title: Marine Biology

Vol. 120

Pages: 545-551

ISSN: 0025-3162

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 21 Citations

Scopus - 25 Citations

Other information

Authenticus ID: P-001-JDD

DOI: 10.1007/bf00350074

Abstract (EN): The cytoplasm of Crassostrea angulata (collected from the Atlantic coast of Northern Spain, Galiza, between 1992 and 1993) spermatogonia contains a few proacrosomal dense vesicles and intermitochondrial round granulo-fibrillar dense bodies. In primary spermatocytes, large cytoplasmic spaces appear occupied by large round and more scattered granulo-fibrillar dense bodies which are intermingled with cord-like dense structures and are in close association with mitochondria and the rough endoplasmic reticulum. As a result of Golgian activity, the number of dense proacrosomal vesicles increases and a flagellum arises from the centrioles. During the second meiotic division, several round dense bodies surrounding cord-like dense structures, as well as dense proacrosomal vesicles, were observed between chromosomes. During spermiogenesis, no Golgian activity was noticed, and only the rough endoplasmic reticulum was observed in close association with proacrosomal vesicles. Similar results were observed for Ostrea edulis (collected from the Atlantic coast of southern Portugal, Algarve, between 1992 and 1993). Spermatozoa of both species are of the aquasperm type, and although their ultrastructure is quite similar, silver and phosphotungstic acid-chromic acid stainings enabled us to clearly distinguish both species at the ultrastructural level. The different morphological aspects of spermatogenesis in the Pteriomorphia and the use of silver and PTA stainings in the Mollusca are reviewed and discussed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7