Abstract:
:Morphogenesis of the Eledone cirrhosa sperm nucleus, as studied by electron microscopic techniques, is compared with that of Octopus vulgaris. Both species of cephalopods belong to the family Octopodidae. The results indicate that extensive nuclear helicoidization during E. cirrhosa spermiogenesis is brought about by modifications of the function of structural components already present in the late steps of O. vulgaris spermiogenesis. In particular, changes in the regulation of perinuclear microtubule contraction in E. cirrhosa spermatids, as well as a decrease in basicity of protamines, promote nuclear helicoidization. Disulphide bond formation between protamine molecules fixes the completely helicoidal shape of the nucleus in mature sperm of E. cirrhosa.
journal_name
Mol Reprod Devjournal_title
Molecular reproduction and developmentauthors
Gimenez-Bonafé P,Ribes E,Zamora MJ,Kasinsky HE,Chiva Mdoi
10.1002/mrd.10124keywords:
subject
Has Abstractpub_date
2002-07-01 00:00:00pages
357-62issue
3eissn
1040-452Xissn
1098-2795journal_volume
62pub_type
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