Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/57607
Full metadata record
DC FieldValueLanguage
dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleCytological steps during spermiogenesis in the house sparrow (Passes domesticus, Linnaeus)pt_BR
dc.contributor.authorGoes, RMpt_BR
dc.contributor.authorDolder, Hpt_BR
unicamp.authorUniv Estadual Paulista, Inst Biociencias Letras & Ciencias Exatas, Dept Biol, BR-15054000 Sao Jose Do Rio Preto, SP, Brazil UNICAMP, IB, Dept Biol Celular, Campinas, SP, Brazilpt_BR
dc.subjectspermiogenesispt_BR
dc.subjectpasserine birdpt_BR
dc.subjectultrastructurept_BR
dc.subject.wosCoturnix-coturnix-japonicapt_BR
dc.subject.wosOstrich Struthio-cameluspt_BR
dc.subject.wosJapanese-quailpt_BR
dc.subject.wosSeminiferous Epitheliumpt_BR
dc.subject.wosSpermatozoapt_BR
dc.subject.wosUltrastructurept_BR
dc.subject.wosSpermiationpt_BR
dc.subject.wosBirdspt_BR
dc.subject.wosCyclept_BR
dc.subject.wosHeadpt_BR
dc.description.abstractSpermiogenesis of the domestic sparrow was investigated with the light and electron microscopes and a step by step classification is proposed. Three cell populations corresponding to early, mid and late spermatids were easily divided according to their positions in the seminiferous epithelium. In addition to this initial separation, six steps were recognized, based on nuclear morphology and the degree of chromatin condensation, in association to their acrosomal and flagellar development. Early spermiogenesis is the period previous to chromatin condensation. The first step can be recognized by the extending flagellum and the second by the pro-acrosome development in contact with the nucleus. During the third or intermediate step, chromatin condenses and the cell becomes polarized with the pro-acrosomic vesicle and the tail occupying opposite sides of the nucleus. Late spermiogenesis, including steps IV-VI, is marked by complete chromatin condensation. The final cellular modifications lead to the formation of a spiraled spermatozoon. This shape is due to the twisting of the acrosome and nucleus, as well as the helical arrangement of mitochondria around the axoneme along most of the flagellum, making an exceptionally long middle piece. (C) 2002 Elsevier Science Ltd. All rights reserved.pt
dc.relation.ispartofTissue & Cellpt_BR
dc.relation.ispartofabbreviationTissue Cellpt_BR
dc.publisher.cityEdinburghpt_BR
dc.publisher.countryEscóciapt_BR
dc.publisherChurchill Livingstonept_BR
dc.date.issued2002pt_BR
dc.date.monthofcirculationAUGpt_BR
dc.identifier.citationTissue & Cell. Churchill Livingstone, v. 34, n. 4, n. 273, n. 282, 2002.pt_BR
dc.language.isoenpt_BR
dc.description.volume34pt_BR
dc.description.issuenumber4pt_BR
dc.description.firstpage273pt_BR
dc.description.lastpage282pt_BR
dc.rightsfechadopt_BR
dc.sourceWeb of Sciencept_BR
unicamp.cruespUNESPpt_BR
dc.identifier.issn0040-8166pt_BR
dc.identifier.wosidWOS:000178638700005pt_BR
dc.identifier.doi10.1016/S0040-8166(02)00017-4pt_BR
dc.date.available2014-11-18T18:33:23Z
dc.date.available2015-11-26T16:57:53Z-
dc.date.accessioned2014-11-18T18:33:23Z
dc.date.accessioned2015-11-26T16:57:53Z-
dc.description.provenanceMade available in DSpace on 2014-11-18T18:33:23Z (GMT). No. of bitstreams: 1 WOS000178638700005.pdf: 1257289 bytes, checksum: a10cd33426f47ecad1edfa8df9e199c0 (MD5) Previous issue date: 2002en
dc.description.provenanceMade available in DSpace on 2015-11-26T16:57:53Z (GMT). No. of bitstreams: 2 WOS000178638700005.pdf: 1257289 bytes, checksum: a10cd33426f47ecad1edfa8df9e199c0 (MD5) WOS000178638700005.pdf.txt: 33257 bytes, checksum: bf31021b9a11e0ea53d9a706722adc11 (MD5) Previous issue date: 2002en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/57607pt_BR
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/57607
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/57607-
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOS000178638700005.pdf1.23 MBAdobe PDFView/Open


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