PMID: 12770486May 29, 2003Paper

Circadian rhythm of sperm release in the gypsy moth, Lymantria dispar: ultrastructural study of transepithelial penetration of sperm bundles

Journal of Insect Physiology
W P. WerginJ M Giebultowicz

Abstract

Release of mature bundles of spermatozoa from the testis into the vas deferens is a critical but poorly understood step in male insect reproduction. In moths, the release of sperm bundles is controlled by a circadian clock which imposes a temporal gate on the daily exit of bundles through the terminal epithelium-a layer of specialized epithelial cells separating testis follicles from the vas deferens. The sequence of cellular events associated with the daily cycle of sperm release was investigated by scanning and transmission electron microscopy. In the hours preceding sperm release, there is a solid barrier between the testis and the vas deferens formed by the interdigitation of cytoplasmic processes of adjacent terminal epithelial cells. At the beginning of the sperm release cycle, sperm bundles protrude through this barrier while the terminal epithelial cells change their shape and position relative to the bundles. Subsequently, the cyst cells enveloping the sperm bundles break down and spermatozoa move out of the testis through the exit channels formed between the epithelial cells. Afterwards, cyst cell remnants and other cellular debris are released into the vas deferens lumen, and the epithelial barrier is reconstructed d...Continue Reading

References

Jan 1, 1992·Journal of Biological Rhythms·J M Giebultowicz, J E Joy
Jan 1, 1972·Zeitschrift für Zellforschung und mikroskopische Anatomie·K T TokuyasuR W Hardy
Feb 1, 1970·The Journal of Cell Biology·D M Phillips
Sep 8, 1989·Science·J M GiebultowiczR L Ridgway

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Citations

May 29, 2003·Journal of Insect Physiology·J M. Giebultowicz
Jun 5, 2003·Journal of Structural Biology·Dominique JolyMichel Lemullois
Apr 13, 2000·Annual Review of Entomology·J M Giebultowicz
Jun 14, 2008·BMC Developmental Biology·Piotr BebasJadwiga M Giebultowicz
Feb 21, 2002·Proceedings of the National Academy of Sciences of the United States of America·L M BeaverJ M Giebultowicz
Feb 22, 2014·Insect Biochemistry and Molecular Biology·Magdalena M MajewskaPiotr Bebas
Jan 26, 2008·The Quarterly Review of Biology·Klaus Reinhardt
Feb 17, 2000·Journal of Biological Rhythms·B O GvakhariaJ M Giebultowicz
Jan 20, 2009·Journal of Biological Rhythms·Joanna KotwicaJadwiga M Giebultowicz
Nov 17, 2001·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·J M Giebultowicz
Oct 11, 2003·Chronobiology International·Zdenka SyrovaJadwiga M Giebultowicz

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