Spermiogenesis in the proteocephalidean cestode Proteocephalus torulosus (Batsch, 1786)
1.
SYSNO ASEP
0157615
Document Type
J - Journal Article
R&D Document Type
Journal Article
Subsidiary J
Ostatní články
Title
Spermiogenesis in the proteocephalidean cestode Proteocephalus torulosus (Batsch, 1786)
Author(s)
Bruňanská, Magdaléna (PAU-O) Nebesářová, Jana (PAU-O) Scholz, Tomáš (PAU-O)
Source Title
Parasitology Research. - : Springer
- ISSN 0932-0113
Roč. 90, č. 4 (2003), s. 318-324
Number of pages
7 s.
Language
eng - English
Country
DE - Germany
Keywords
cestoda ; spermiogenesis ; ultrastructure
Subject RIV
GJ - Animal Vermins ; Diseases, Veterinary Medicine
R&D Projects
GA524/01/1314 GA ČR - Czech Science Foundation (CSF)
GA206/03/1317 GA ČR - Czech Science Foundation (CSF)
CEZ
AV0Z6022909 - PAU-O, BC-A
Annotation
Spermiogenesis of the cestode Proteocephalus torulosus (Batsch, 1786) was examined for the first time using transmission electron microscopy. Spermiogenesis begins with the formation of a distal cytoplasmic protrusion, a differentiation zone, at the periphery of the early spermatid. This differentiation zone is lined with cortical microtubules and contains two centrioles. A flagellar bud arises from each centriole, growing later as a free flagellum. Simultaneously, a median cytoplasmic process (MCP) develops distally to the flagella. The two flagella, which are of unequal length, become longer and rotate towards the MCP. The nucleus elongates and when both flagella are fused with the MCP, the nucleus subsequently migrates into the MCP. Finally, the advanced spermatids detach from a condensing residual cytoplasm at the level of the arching membranes.
