New findings on sperm ultrastructure in thrips (Thysanoptera, Insecta)

Arthropod Structure & Development
Eugenio PaccagniniRomano Dallai

Abstract

Sperm ultrastructure of several species in each of the two suborders of Thysanoptera Tubulifera and Terebrantia shows a distinctive and unusual architecture. Members of the whole order share a bizarre axoneme consisting of 27 microtubular elements derived from the amalgamation of 3 (9+0) axonemes present in each spermatid at the beginning of spermiogenesis. The reciprocal shifting of these axonemes along the length of the sperm, together with their possible shortening and overlapping for short distances, could explain why in some species it is never possible to observe the complete set of 27 microtubular elements in any one cross section. Tubuliferan sperm have a small elliptical (in cross section) acrosome extending the length of the sperm. In Bolothrips insularis and Compsothrips albosignatus this structure is larger and is associated with an external, flattened vesicle throughout its length. Terebrantian sperm lack an acrosome, but display for half their length a dense body running parallel to the nucleus. The sperm, in members of this suborder, are also characterized by possession of a small mitochondrion and by the unusual bilobed outline of cross sections through the anterior sperm region, with the nucleus located in one ...Continue Reading

References

Apr 26, 2003·Journal of Structural Biology·Romano DallaiPietro Lupetti
Aug 19, 2003·Developmental Biology·Maria Giovanna Riparbelli, Giuliano Callaini
Dec 20, 2005·Current Opinion in Cell Biology·Meng-Fu Bryan Tsou, Tim Stearns
Jun 29, 2007·Cell Motility and the Cytoskeleton·Eugenio PaccagniniRomano Dallai

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Citations

Jun 15, 2010·Tissue & Cell·Eugenio PaccagniniRomano Dallai
Mar 18, 2016·Annual Review of Entomology·Romano DallaiRolf Georg Beutel
Apr 16, 2014·Arthropod Structure & Development·Romano Dallai
Jul 23, 2021·Arthropod Structure & Development·Stephanie Krueger, Gerald Moritz

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