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Acrosome formation and the centriolar complex in the spermatozoa of Sabella penicillum (Polychaeta) |
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| Authors: | Cand Real Harald Kryvi Dr Ingrid Graebner |
| Institution: | (1) Institute of Anatomy, University of Bergen, Norway;(2) Institute of Zoology, University of Salzburg, Austria;(3) Institute of Anatomy, University of Bergen, N-5000 Bergen, Norway;(4) Zoologisches Institut, Universität Salzburg, A-5020 Salzburg, Austria |
| Abstract: | Summary The acrosomal vesicle of Sabella penicillum spermatids consists of an electrondense core and a more transparent surrounding zone. During subsequent differentiation the vesicle membrane forms several invaginations in the juxtanuclear area. These invaginations later establish contact with the core. In the mature spermatozoon the spaces between the invaginations appear as electron-dense  tubules ; this is probably due to a shift of material from core to periphery. The ultrastructure of the centriolar complex is described in detail.Work supported by the Norwegian Research Council for Science and Humanities (NAVF; Grant Nr. D 61.44) and The Austrian Fonds zur Förderung der wissenschaftlichen Forschung Projekt 2183 and N 39. |
| Keywords: | Acrosome Centriolar complex Ultrastructure Sabella penicillum (Polychaeta) |
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