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Evidence for nuclear membrane fluidity pro acrosome migration and nuclear pore re distribution during grasshopper locusta migratoria spermiogenesis


Evidence for nuclear membrane fluidity pro acrosome migration and nuclear pore re distribution during grasshopper locusta migratoria spermiogenesis



Cell Motility 2(4): 355-368



ISSN/ISBN: 0271-6585

EM examination of thin sections and freeze fractures of Locusta spermatids revealed that the proacrosome docks to the nuclear membrane and glides around the nucleus during sperm development. Nuclear pore complexes occur in groups distributed at random over the entire nucleus of the early spermatid; they are found only in a narrow ring closely surrounding the centriolar adjunct in later spermatids. The pores appear to be swept caudally in the nuclear envelope, perhaps by a process like capping; they are not merely excluded by structures adhering to the nucleus. Both proacrosome migration and the deployment of pores are probably facilitated by the inherent fluidity of the nuclear membranes.

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Accession: 005409092

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