| Popis: |
Spermatozoa of the common squid, Loligo vulgaris , have been examined in a combined thin-sectioning and freeze-fracture study. Zipper-lines were seen in freeze-fracture replicas as rows of particles located on the proximal end of the axoneme. In thin section granules were visible on both sides of the tail membrane surrounding the axoneme at the proximal level, but another structure that could be identified as a zipper-line was also seen in thin section; this structure links accessory fibres to the tail membrane of the sperm. The role(s) of zipper-lines is discussed. |
