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THE ACROSOME AND POST‐NUCLEAR CAP OF BULL SPERMATOZOA
Author(s) -
Hancock J. L.,
Trevan D. J.
Publication year - 1956
Publication title -
journal of the royal microscopical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0368-3974
DOI - 10.1111/j.1365-2818.1956.tb00442.x
Subject(s) - acrosome , spermatid , spermatozoon , anatomy , biology , microbiology and biotechnology , andrology , chemistry , sperm , semen , human fertilization , botany , medicine
SYNOPSIS A description is given of the development of the acrosome and post‐nuclear cap of normal bull spermatozoa and of the abnormal “knobbed” spermatozoa of certain sterile bulls. The acrosome of the normal spermatid has two components—the “cap” and the “bead.” Evidence is presented that the acrosome of the mature spermatozoon has also two components—a PAS‐positive, silver‐negative component which is formed from the cap of the spermatid and a silver‐positive component which is formed from the bead. It is suggested that the equatorial segment is a gap between the silver‐positive component of the acrosome and the silver‐positive post‐nuclear cap. In “knobbed” spermatozoa the bead persists, the silver‐positive component of the acrosome is not formed and no equatorial segment is detectable. The development of the post‐nuclear cap of “knobbed” spermatozoa is normal.