Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2001 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0101-81752001000400003 http://hdl.handle.net/11449/28347 |
Resumo: | Oogenesis involves a set of transformations which are undergone by female germ cells These cells change into oogonias and then into mature oocytes. Sexually mature female fish were collected monthly, during one year, from the Sapucaí River, a tributary of the Rio Grande, which is part of the Furnas Reservoir in the state of Minas Gerais. During the several stages of maturation, we observed small round oogonias with a large nucleus, a single nucleolus, and weakly stained cytoplasm with eosinophilic granules. The primary oocytes showed a large basophilic nucleus, with a developed peripheral nucleolus and a reduced cytoplasm. The previtellogenic oocytes presented voluminous cytoplasm and nucleus with several small peripheral nucleoli. The oocytes underwent vitellogenesis with the development of the zona radiata and the follicle cells. Their cytochemical reactions indicated that the two layers of the zona radiata of A. fasciatus contained proteins and polysaccharides. The initially squamous follicle cells, became cuboidal. In mature oocytes, the nucleus moved toward the periphery, next to the micropyle, and the yolk granules formed by proteins, fulfilled the cytoplasm. The clear unstained vesicles are likely to be the cortical alveoli in the perivitelline region. |
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Repositório Institucional da UNESP |
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Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, BrazilTeleosteiCharacidaeAstyanax fasciatusoogenesiscytochemicalOogenesis involves a set of transformations which are undergone by female germ cells These cells change into oogonias and then into mature oocytes. Sexually mature female fish were collected monthly, during one year, from the Sapucaí River, a tributary of the Rio Grande, which is part of the Furnas Reservoir in the state of Minas Gerais. During the several stages of maturation, we observed small round oogonias with a large nucleus, a single nucleolus, and weakly stained cytoplasm with eosinophilic granules. The primary oocytes showed a large basophilic nucleus, with a developed peripheral nucleolus and a reduced cytoplasm. The previtellogenic oocytes presented voluminous cytoplasm and nucleus with several small peripheral nucleoli. The oocytes underwent vitellogenesis with the development of the zona radiata and the follicle cells. Their cytochemical reactions indicated that the two layers of the zona radiata of A. fasciatus contained proteins and polysaccharides. The initially squamous follicle cells, became cuboidal. In mature oocytes, the nucleus moved toward the periphery, next to the micropyle, and the yolk granules formed by proteins, fulfilled the cytoplasm. The clear unstained vesicles are likely to be the cortical alveoli in the perivitelline region.UNIFENAS Faculdade de Medicina Veterinária Departamento de Medicina Veterinária PreventivaUNIFENAS Instituto de Odontologia e Ciências da SaúdeUNIFENAS Instituto de Farmácia e NutriçãoUniversidade Estadual Paulista Instituto de Biociências Departamento de MorfologiaUniversidade Estadual Paulista Instituto de Biociências Departamento de MorfologiaSociedade Brasileira de ZoologiaUNIFENAS Faculdade de Medicina Veterinária Departamento de Medicina Veterinária PreventivaUNIFENAS Instituto de Odontologia e Ciências da SaúdeUNIFENAS Instituto de Farmácia e NutriçãoUniversidade Estadual Paulista (Unesp)Garcia, José Antônio DiasChini, Helena A.S.Maistro, Edson Luis [UNESP]Quagio-Grassiotto, Irani [UNESP]2014-05-20T15:12:21Z2014-05-20T15:12:21Z2001-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1057-1064application/pdfhttp://dx.doi.org/10.1590/S0101-81752001000400003Revista Brasileira de Zoologia. Sociedade Brasileira de Zoologia, v. 18, n. 4, p. 1057-1064, 2001.0101-8175http://hdl.handle.net/11449/2834710.1590/S0101-81752001000400003S0101-81752001000400003S0101-81752001000400003.pdf47875216130383150000-0003-0757-7876SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira de Zoologiainfo:eu-repo/semantics/openAccess2023-12-19T06:22:55Zoai:repositorio.unesp.br:11449/28347Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-19T06:22:55Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil |
title |
Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil |
spellingShingle |
Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil Garcia, José Antônio Dias Teleostei Characidae Astyanax fasciatus oogenesis cytochemical |
title_short |
Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil |
title_full |
Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil |
title_fullStr |
Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil |
title_full_unstemmed |
Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil |
title_sort |
Dynamics and cytochemistry of oogenesis in Astyanax fasciatus (Cuvier) (Teleostei, Characiformes, Characidae) from Rio Sapucaí, Minas Gerais State, Brazil |
author |
Garcia, José Antônio Dias |
author_facet |
Garcia, José Antônio Dias Chini, Helena A.S. Maistro, Edson Luis [UNESP] Quagio-Grassiotto, Irani [UNESP] |
author_role |
author |
author2 |
Chini, Helena A.S. Maistro, Edson Luis [UNESP] Quagio-Grassiotto, Irani [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
UNIFENAS Faculdade de Medicina Veterinária Departamento de Medicina Veterinária Preventiva UNIFENAS Instituto de Odontologia e Ciências da Saúde UNIFENAS Instituto de Farmácia e Nutrição Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Garcia, José Antônio Dias Chini, Helena A.S. Maistro, Edson Luis [UNESP] Quagio-Grassiotto, Irani [UNESP] |
dc.subject.por.fl_str_mv |
Teleostei Characidae Astyanax fasciatus oogenesis cytochemical |
topic |
Teleostei Characidae Astyanax fasciatus oogenesis cytochemical |
description |
Oogenesis involves a set of transformations which are undergone by female germ cells These cells change into oogonias and then into mature oocytes. Sexually mature female fish were collected monthly, during one year, from the Sapucaí River, a tributary of the Rio Grande, which is part of the Furnas Reservoir in the state of Minas Gerais. During the several stages of maturation, we observed small round oogonias with a large nucleus, a single nucleolus, and weakly stained cytoplasm with eosinophilic granules. The primary oocytes showed a large basophilic nucleus, with a developed peripheral nucleolus and a reduced cytoplasm. The previtellogenic oocytes presented voluminous cytoplasm and nucleus with several small peripheral nucleoli. The oocytes underwent vitellogenesis with the development of the zona radiata and the follicle cells. Their cytochemical reactions indicated that the two layers of the zona radiata of A. fasciatus contained proteins and polysaccharides. The initially squamous follicle cells, became cuboidal. In mature oocytes, the nucleus moved toward the periphery, next to the micropyle, and the yolk granules formed by proteins, fulfilled the cytoplasm. The clear unstained vesicles are likely to be the cortical alveoli in the perivitelline region. |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001-12-01 2014-05-20T15:12:21Z 2014-05-20T15:12:21Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S0101-81752001000400003 Revista Brasileira de Zoologia. Sociedade Brasileira de Zoologia, v. 18, n. 4, p. 1057-1064, 2001. 0101-8175 http://hdl.handle.net/11449/28347 10.1590/S0101-81752001000400003 S0101-81752001000400003 S0101-81752001000400003.pdf 4787521613038315 0000-0003-0757-7876 |
url |
http://dx.doi.org/10.1590/S0101-81752001000400003 http://hdl.handle.net/11449/28347 |
identifier_str_mv |
Revista Brasileira de Zoologia. Sociedade Brasileira de Zoologia, v. 18, n. 4, p. 1057-1064, 2001. 0101-8175 10.1590/S0101-81752001000400003 S0101-81752001000400003 S0101-81752001000400003.pdf 4787521613038315 0000-0003-0757-7876 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Revista Brasileira de Zoologia |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1057-1064 application/pdf |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Zoologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Zoologia |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1803650029725941760 |