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Evolution of octopod sperm II: Comparison of acrosomal morphogenesis in Eledone and Octopus
Author(s) -
Ribes Enric,
GimenezBonafé Pepita,
Zamora Maria J.,
Gonzalez Angel,
Kasinsky Harold,
Chiva Manel
Publication year - 2002
Publication title -
molecular reproduction and development
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.745
H-Index - 105
eISSN - 1098-2795
pISSN - 1040-452X
DOI - 10.1002/mrd.10103
Subject(s) - acrosome , biology , spermatid , spermiogenesis , organelle , morphogenesis , sperm , microbiology and biotechnology , anatomy , botany , genetics , gene
The first stages of acrosome development during Eledone cirrhosa spermiogenesis are similar to that in Octopus vulgaris , and comprise the initial elongation of both organelles. However, the acrosome in E. cirrhosa does not continue its elongation as it does in O. vulgaris . Instead, its length remains fixed and it undergoes a process of helicoidization that includes the entire organelle. In each spermatid, helicoidization of the E. cirrhosa acrosome occurs simultaneously with helicoidization of the nucleus. The acrosome is associated with special structures that probably are involved in the helical torsion of the organelle. We propose a hypothesis to explain the evolutionary relationship between the acrosomes of O. vulgaris and E. cirrhosa , particularly as it is influenced by nucleomorphogenesis and microtubular contraction. Mol. Reprod. Dev. 62: 363–367, 2002. © 2002 Wiley‐Liss, Inc.