Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/198303
Type: Artigo de periódico
Title: Sperm Structure And Ultrastructure Of The Melittobia Hawaiiensis, Perkins And M. Australica, Girault (chalcidoidea: Eulophidae).
Author: Brito, Pedro
Lino-Neto, José
Dolder, Heidi
Abstract: Spermatozoa morphology has, for some years, been used to help answer some phylogenetic questions for Hymenoptera. This is the second study describing spermatozoa morphology of an Eulophidae species in which important characteristics were observed. Melittobia spermatozoa are spiralled and measure approximately 270microm in length. The head contains a small acrosome, apparently formed only by an acrosomal vesicle, which, together with the initial nuclear region, is surrounded by an extracellular sheath, from which innumerable filaments irradiate. The nucleus is helicoidal and completely filled with compact chromatin. A centriolar adjunct is observed at the nucleus-flagellum transition; it associates laterally with the nucleus and exhibits two small expansions, which reach around the centriole. In the flagellum there are two mitochondrial derivatives, which in cross-sections are asymmetric. In the derivative with the larger diameter, two distinct regions are observed, a small one, near the axoneme, with a clear fissure inside, and a larger region where the cristae occur. Both derivatives initiate at the nuclear base, but the larger diameter derivative finishes first, before the flagellum extremity. At the end of the axoneme, the accessory microtubules are the first to finish.
Subject: Acrosome
Animals
Axoneme
Cell Nucleus
Centrioles
Flagella
Hymenoptera
Male
Microtubules
Mitochondria
Species Specificity
Spermatozoa
Citation: Tissue & Cell. v. 41, n. 2, p. 113-7, 2009-Apr.
Rights: fechado
Identifier DOI: 10.1016/j.tice.2008.08.002
Address: http://www.ncbi.nlm.nih.gov/pubmed/18842277
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
pmed_18842277.pdf826.91 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.