The basement membrane and the sex establishment in the juvenile hermaphroditism during gonadal differentiation of the Gymnocorymbus ternetzi (Teleostei: Characiformes: Characidae)

dc.contributorUniversidade Estadual de Campinas (UNICAMP)
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorFlorida Fish and Wildlife Research Institute
dc.creatorMazzoni, Talita Sarah [UNESP]
dc.creatorGrier, Harry J.
dc.creatorQuagio-Grassiotto, Irani [UNESP]
dc.date2015-12-07T15:38:15Z
dc.date2015-12-07T15:38:15Z
dc.date2015-09-19
dc.date.accessioned2023-09-12T07:37:49Z
dc.date.available2023-09-12T07:37:49Z
dc.identifierhttp://dx.doi.org/10.1002/ar.23270
dc.identifierAnatomical Record, v. 298, n. 12, p. 1984-2010, 2015.
dc.identifier1932-8494
dc.identifierhttp://hdl.handle.net/11449/131593
dc.identifier10.1002/ar.23270
dc.identifier26386207
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8780872
dc.descriptionAlthough there are several studies on morphogenesis in Teleostei, until now there is no research describing the role of the basement membrane in the establishment of the germinal epithelium during gonadal differentiation in Characiformes. In attempt to study these events that result in the formation of ovarian and testicular structures, gonads of Gymnocorymbus ternetzi were prepared for light microscopy. During gonadal development in G. ternetzi, all individuals first developed ovarian tissue. The undifferentiated gonad was formed by somatic cells (SC) and primordial germ cells (PGCs). After successive mitosis, the PGCs became oogonia, which entered into meiosis originating oocytes. An interstitial tissue developed. In half of the individuals, presumptive female, prefollicle cells synthesized a basement membrane around oocyte forming a follicle. Along the ventral region of the ovary, the tissue invaginated to form the ovigerous lamellae, bordered by the germinal epithelium. Stroma developed and the follicle complexes were formed. The gonadal aromatase was detected in interstitial cells in the early steps of the gonadal differentiation in both sexes. In another half of the individuals, presumptive male, there was no synthesis of basement membrane. The interstitium was invaded by numerous granulocytes. Pre-Leydig cells proliferated. Apoptotic oocytes were observed and afterward degenerated. Spermatogonia appeared near the degenerating oocytes and associated to SCs, forming testicular tubules. Germinal epithelium developed and the basement membrane was synthesized. Concomitantly, there was decrease of the gonadal aromatase and increase in the 3β-HSD enzyme expression. Thus, the testis was organized on an ovary previously developed, constituting an indirect gonochoristic differentiation.
dc.descriptionGraduate Program on the Cell and Structural, Biology Instituto De Biologia (Unicamp), Campinas, SP, Brasil.
dc.descriptionInstituto De Biociências De Botucatu (Unesp), Departamento De Morfologia, Botucatu, SP, Brasil.
dc.descriptionFlorida Fish and Wildlife Research Institute, St. Petersburg, FL.
dc.descriptionCaunesp, Centro De Aquicultura Da Unesp, Jaboticabal, SP, Brasil.
dc.descriptionUniversidade Estadual Paulista, Departamento de Morfologia, Instituto de Biociências de Botucatu
dc.descriptionUniversidade Estadual Paulista, Centro de Aquicultura da UNESP de Jaboticabal
dc.format1984-2010
dc.languageeng
dc.publisherWiley-Blackwell
dc.relationAnatomical Record (hoboken, N.j. : 2007)
dc.relation0,766
dc.rightsAcesso restrito
dc.sourcePubMed
dc.subjectCharacidae
dc.subjectBasement membrane
dc.subjectGerminal epithelium
dc.subjectGonadal differentiation
dc.subjectJuvenile hermaphroditism
dc.titleThe basement membrane and the sex establishment in the juvenile hermaphroditism during gonadal differentiation of the Gymnocorymbus ternetzi (Teleostei: Characiformes: Characidae)
dc.typeArtigo


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