An electron microscopic study of spermatogenesis in the drone of scaptotrigona postica (hymenoptera, apidae)
Autor(a) principal: | |
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Data de Publicação: | 1980 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1080/01651269.1980.10553362 http://hdl.handle.net/11449/224385 |
Resumo: | Gonocyst growth in the drone of S. postica is characterized by a series of 5 synchronous mitoses in which cytokinesis is incomplete, and the original cells remain interconnected until spermatozoa formation.During meiosis the division of spermatocytes I was terminated with an anomalous metaphase plate formation at the end of prophase (I). A concentric endoplasmic reticulum encircled the metaphase chromosomes; though microtubuleswere present, spindles were not formed. This abortive division also affected the particular behavior of the centrioles. Although the centrioles proliferated during prophase I, they did not give rise to a spindle, but became associated with the formation of centriolar blebs at cell surface, and seemed eventually to be eliminated.In S. postica, the chromosome number is maintained due to the abortiveness of the first meiotic division; therefore, chromosome distribution is normal during the subsequent division. The second meiotic division resulted in the formation of two spermatids, one of which has a greatly reduced amount of cytoplasm. Nevertheless, bothspermatids formed what look like normal sperm cells. Thus, the Scaptotrigona drone produces 2 rather than 4 sperm cells from each spermatocyte. © 1980 Taylor & Francis Group, LLC. |
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Repositório Institucional da UNESP |
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An electron microscopic study of spermatogenesis in the drone of scaptotrigona postica (hymenoptera, apidae)Drone stingless beeHaploid spermatogenesisMeliponinaeUltrastructureGonocyst growth in the drone of S. postica is characterized by a series of 5 synchronous mitoses in which cytokinesis is incomplete, and the original cells remain interconnected until spermatozoa formation.During meiosis the division of spermatocytes I was terminated with an anomalous metaphase plate formation at the end of prophase (I). A concentric endoplasmic reticulum encircled the metaphase chromosomes; though microtubuleswere present, spindles were not formed. This abortive division also affected the particular behavior of the centrioles. Although the centrioles proliferated during prophase I, they did not give rise to a spindle, but became associated with the formation of centriolar blebs at cell surface, and seemed eventually to be eliminated.In S. postica, the chromosome number is maintained due to the abortiveness of the first meiotic division; therefore, chromosome distribution is normal during the subsequent division. The second meiotic division resulted in the formation of two spermatids, one of which has a greatly reduced amount of cytoplasm. Nevertheless, bothspermatids formed what look like normal sperm cells. Thus, the Scaptotrigona drone produces 2 rather than 4 sperm cells from each spermatocyte. © 1980 Taylor & Francis Group, LLC.Departamento de Biologia Instituto de Biociências UNESP Campus Universitário de Rio Claro, 13.500 Rio Claro, Sño PauloDepartamento de Biologia Instituto de Biociências UNESP Campus Universitário de Rio Claro, 13.500 Rio Claro, Sño PauloUniversidade Estadual Paulista (UNESP)Da cruzlandim, C. [UNESP]Beig, D. [UNESP]2022-04-28T19:56:11Z2022-04-28T19:56:11Z1980-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article271-283http://dx.doi.org/10.1080/01651269.1980.10553362International Journal of Invertebrate Reproduction, v. 2, n. 5, p. 271-283, 1980.0165-1269http://hdl.handle.net/11449/22438510.1080/01651269.1980.105533622-s2.0-0343376416Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengInternational Journal of Invertebrate Reproductioninfo:eu-repo/semantics/openAccess2022-04-28T19:56:11Zoai:repositorio.unesp.br:11449/224385Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T19:56:11Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
An electron microscopic study of spermatogenesis in the drone of scaptotrigona postica (hymenoptera, apidae) |
title |
An electron microscopic study of spermatogenesis in the drone of scaptotrigona postica (hymenoptera, apidae) |
spellingShingle |
An electron microscopic study of spermatogenesis in the drone of scaptotrigona postica (hymenoptera, apidae) Da cruzlandim, C. [UNESP] Drone stingless bee Haploid spermatogenesis Meliponinae Ultrastructure |
title_short |
An electron microscopic study of spermatogenesis in the drone of scaptotrigona postica (hymenoptera, apidae) |
title_full |
An electron microscopic study of spermatogenesis in the drone of scaptotrigona postica (hymenoptera, apidae) |
title_fullStr |
An electron microscopic study of spermatogenesis in the drone of scaptotrigona postica (hymenoptera, apidae) |
title_full_unstemmed |
An electron microscopic study of spermatogenesis in the drone of scaptotrigona postica (hymenoptera, apidae) |
title_sort |
An electron microscopic study of spermatogenesis in the drone of scaptotrigona postica (hymenoptera, apidae) |
author |
Da cruzlandim, C. [UNESP] |
author_facet |
Da cruzlandim, C. [UNESP] Beig, D. [UNESP] |
author_role |
author |
author2 |
Beig, D. [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Da cruzlandim, C. [UNESP] Beig, D. [UNESP] |
dc.subject.por.fl_str_mv |
Drone stingless bee Haploid spermatogenesis Meliponinae Ultrastructure |
topic |
Drone stingless bee Haploid spermatogenesis Meliponinae Ultrastructure |
description |
Gonocyst growth in the drone of S. postica is characterized by a series of 5 synchronous mitoses in which cytokinesis is incomplete, and the original cells remain interconnected until spermatozoa formation.During meiosis the division of spermatocytes I was terminated with an anomalous metaphase plate formation at the end of prophase (I). A concentric endoplasmic reticulum encircled the metaphase chromosomes; though microtubuleswere present, spindles were not formed. This abortive division also affected the particular behavior of the centrioles. Although the centrioles proliferated during prophase I, they did not give rise to a spindle, but became associated with the formation of centriolar blebs at cell surface, and seemed eventually to be eliminated.In S. postica, the chromosome number is maintained due to the abortiveness of the first meiotic division; therefore, chromosome distribution is normal during the subsequent division. The second meiotic division resulted in the formation of two spermatids, one of which has a greatly reduced amount of cytoplasm. Nevertheless, bothspermatids formed what look like normal sperm cells. Thus, the Scaptotrigona drone produces 2 rather than 4 sperm cells from each spermatocyte. © 1980 Taylor & Francis Group, LLC. |
publishDate |
1980 |
dc.date.none.fl_str_mv |
1980-01-01 2022-04-28T19:56:11Z 2022-04-28T19:56:11Z |
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/10.1080/01651269.1980.10553362 International Journal of Invertebrate Reproduction, v. 2, n. 5, p. 271-283, 1980. 0165-1269 http://hdl.handle.net/11449/224385 10.1080/01651269.1980.10553362 2-s2.0-0343376416 |
url |
http://dx.doi.org/10.1080/01651269.1980.10553362 http://hdl.handle.net/11449/224385 |
identifier_str_mv |
International Journal of Invertebrate Reproduction, v. 2, n. 5, p. 271-283, 1980. 0165-1269 10.1080/01651269.1980.10553362 2-s2.0-0343376416 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
International Journal of Invertebrate Reproduction |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
271-283 |
dc.source.none.fl_str_mv |
Scopus 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 |
|
_version_ |
1799965149365272576 |