Abstract:
:The spermatozoon of the monopisthocotylean monogenean Pseudodactylogyrus sp. (a gill parasite of eels) has a single axoneme showing a 9 + '1' pattern, a nucleus and a mitochondrion, but has no cortical microtubules. This species thus provides a very simple model for the study of tubulin in the 9 + '1' axonemes of the Platyhelminthes, in contrast with digenean sperm which have a more complex spermatozoon with two such axonemes and cortical microtubules. Indirect immunofluorescence labelling of tubulin shows that the elongating spermatids, initially lying in all directions in the early stages, are arranged as parallel elements in further stages. The number of spermatids in an isogenic group could also be precisely counted and equals 32. Nuclear labelling with fluorescent dyes shows that the nuclei, first located in the common mass of the spermatids, later elongate and migrate into the growing spermatids, and that the nucleus is located in the central part of the mature spermatozoon, with the two extremities devoid of nucleus. Labelling with antibodies directed against acetylated, tyrosinated, and polyglutamylated tubulin gave positive results, thus indicating that these post-translational modifications of tubulin are present in the axoneme of spermatids and spermatozoa of monopisthocotylean monogeneans.
journal_name
Tissue Celljournal_title
Tissue & cellauthors
Mollaret I,Justine JLdoi
10.1016/s0040-8166(97)80045-6subject
Has Abstractpub_date
1997-12-01 00:00:00pages
699-706issue
6eissn
0040-8166issn
1532-3072pii
S0040-8166(97)80045-6journal_volume
29pub_type
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