An ultrastructural study of microtubules and the acrosome in spermiogenesis of tubificidae (oligochaeta)

Jamieson B.G.M. and Daddow L. (1979) An ultrastructural study of microtubules and the acrosome in spermiogenesis of tubificidae (oligochaeta). Journal of Ultrasructure Research, 67 2: 209-224. doi:10.1016/S0022-5320(79)80008-8


Author Jamieson B.G.M.
Daddow L.
Title An ultrastructural study of microtubules and the acrosome in spermiogenesis of tubificidae (oligochaeta)
Journal name Journal of Ultrasructure Research   Check publisher's open access policy
ISSN 0022-5320
Publication date 1979-01-01
Sub-type Article (original research)
DOI 10.1016/S0022-5320(79)80008-8
Open Access Status Not yet assessed
Volume 67
Issue 2
Start page 209
End page 224
Total pages 16
Subject 1312 Molecular Biology
2702 Anatomy
Abstract Limnodriloides winckelmanni shows stages in condensation of the nucleus and development of microtubules in the maturing spermatid similar to those formerly described for Limnodrilus and Tubifex. Contrary to previous reports, the total number of perinuclear and cytoplasmic microtubules does not appear constant. The midpiece in the tubificids, consisting of two to six radially adpressed unspiraled mitochondria, is less elongated than that of megascolecids and lumbricids. The flagellum is similar to that previously described for earthworms. Two centrioles are demonstrated for the first time in tubificids. The proximal centriole loses its association with the flagellum but its subsequent fate is unknown. The acrosome shows general homology with that of other oligochaetes investigated (enchytraeids, megascolecids, and lumbricids). Shared features are the external plasma membrane; the apical primary acrosome vesicle; the subvesicular space (subacrosomal space) invaginated into this and giving rise to the axial rod which is injected into the acrosome tube; a periaxial sheath (secondary tube) dependent from the primary vesicle and encircling the rod; and a dense ring within the primary vesicle. Spermatozoa of Branchiobdellidae and leeches are compared with those of oligochaetes. Each of the three groups has a distinctive spermatozoal morphology, though that of Branchiobdellids is in some respects intermediate between leeches and oligochaetes.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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