Testicular, spermatogenesis and sperm morphology in Martarega bentoi (Heteroptera: Notonectidae)
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | LOCUS Repositório Institucional da UFV |
Texto Completo: | https://doi.org/10.1016/j.asd.2017.04.002 http://www.locus.ufv.br/handle/123456789/19602 |
Resumo: | The testicular, spermatogenesis and sperm morphology of the backswimmer Martarega bentoi was described using light and transmission electron microscopy. In this species, a pair of testes, two deferent ducts, two different pairs of accessory glands, and an ejaculatory duct form the male reproductive system. Each testis consists of two testicular follicles, which are arranged side by side in snail shape. The follicles are filled with cysts at different stages of spermatogenesis, but in the same cyst the germ cells (up to 64) are in the same stage. At the end of spermatogenesis, the sperm cells are very long, with the flagellum measuring approximately 2500 μm in length, the nucleus only 19 μm, and the acrosome, with two distinct regions, 300 μm. The flagellum is composed of an axoneme, with a 9 + 9 + 2 microtubular pattern, and 2 asymmetric mitochondrial derivatives (MDs). These have the anterior ends inserted into two cavities at the nucleus base, exhibit two paracrystalline inclusions, and have bridges linking them to the axoneme. Few spermatozoa per cyst, asymmetry in size and shape of the MDs, as well as their insertion at the nuclear base are characteristics considered derived, and that differentiate the sperm of M. bentoi from those of the Nepomorpha, Belostomatidae and Nepidae. |
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Testicular, spermatogenesis and sperm morphology in Martarega bentoi (Heteroptera: Notonectidae)HemipteraNepomorphaBackswimmerSperm ultrastructureThe testicular, spermatogenesis and sperm morphology of the backswimmer Martarega bentoi was described using light and transmission electron microscopy. In this species, a pair of testes, two deferent ducts, two different pairs of accessory glands, and an ejaculatory duct form the male reproductive system. Each testis consists of two testicular follicles, which are arranged side by side in snail shape. The follicles are filled with cysts at different stages of spermatogenesis, but in the same cyst the germ cells (up to 64) are in the same stage. At the end of spermatogenesis, the sperm cells are very long, with the flagellum measuring approximately 2500 μm in length, the nucleus only 19 μm, and the acrosome, with two distinct regions, 300 μm. The flagellum is composed of an axoneme, with a 9 + 9 + 2 microtubular pattern, and 2 asymmetric mitochondrial derivatives (MDs). These have the anterior ends inserted into two cavities at the nucleus base, exhibit two paracrystalline inclusions, and have bridges linking them to the axoneme. Few spermatozoa per cyst, asymmetry in size and shape of the MDs, as well as their insertion at the nuclear base are characteristics considered derived, and that differentiate the sperm of M. bentoi from those of the Nepomorpha, Belostomatidae and Nepidae.Arthropod Structure & Development2018-05-16T11:49:44Z2018-05-16T11:49:44Z2017-05-18info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf1467-8039https://doi.org/10.1016/j.asd.2017.04.002http://www.locus.ufv.br/handle/123456789/19602engVolume 46, Issue 4, Pages 635-643, July 2017Elsevier Ltd.info:eu-repo/semantics/openAccessNovais, Ademária M.Dias, GlendaLino-Neto, Joséreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2024-07-12T07:22:47Zoai:locus.ufv.br:123456789/19602Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T07:22:47LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.none.fl_str_mv |
Testicular, spermatogenesis and sperm morphology in Martarega bentoi (Heteroptera: Notonectidae) |
title |
Testicular, spermatogenesis and sperm morphology in Martarega bentoi (Heteroptera: Notonectidae) |
spellingShingle |
Testicular, spermatogenesis and sperm morphology in Martarega bentoi (Heteroptera: Notonectidae) Novais, Ademária M. Hemiptera Nepomorpha Backswimmer Sperm ultrastructure |
title_short |
Testicular, spermatogenesis and sperm morphology in Martarega bentoi (Heteroptera: Notonectidae) |
title_full |
Testicular, spermatogenesis and sperm morphology in Martarega bentoi (Heteroptera: Notonectidae) |
title_fullStr |
Testicular, spermatogenesis and sperm morphology in Martarega bentoi (Heteroptera: Notonectidae) |
title_full_unstemmed |
Testicular, spermatogenesis and sperm morphology in Martarega bentoi (Heteroptera: Notonectidae) |
title_sort |
Testicular, spermatogenesis and sperm morphology in Martarega bentoi (Heteroptera: Notonectidae) |
author |
Novais, Ademária M. |
author_facet |
Novais, Ademária M. Dias, Glenda Lino-Neto, José |
author_role |
author |
author2 |
Dias, Glenda Lino-Neto, José |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Novais, Ademária M. Dias, Glenda Lino-Neto, José |
dc.subject.por.fl_str_mv |
Hemiptera Nepomorpha Backswimmer Sperm ultrastructure |
topic |
Hemiptera Nepomorpha Backswimmer Sperm ultrastructure |
description |
The testicular, spermatogenesis and sperm morphology of the backswimmer Martarega bentoi was described using light and transmission electron microscopy. In this species, a pair of testes, two deferent ducts, two different pairs of accessory glands, and an ejaculatory duct form the male reproductive system. Each testis consists of two testicular follicles, which are arranged side by side in snail shape. The follicles are filled with cysts at different stages of spermatogenesis, but in the same cyst the germ cells (up to 64) are in the same stage. At the end of spermatogenesis, the sperm cells are very long, with the flagellum measuring approximately 2500 μm in length, the nucleus only 19 μm, and the acrosome, with two distinct regions, 300 μm. The flagellum is composed of an axoneme, with a 9 + 9 + 2 microtubular pattern, and 2 asymmetric mitochondrial derivatives (MDs). These have the anterior ends inserted into two cavities at the nucleus base, exhibit two paracrystalline inclusions, and have bridges linking them to the axoneme. Few spermatozoa per cyst, asymmetry in size and shape of the MDs, as well as their insertion at the nuclear base are characteristics considered derived, and that differentiate the sperm of M. bentoi from those of the Nepomorpha, Belostomatidae and Nepidae. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-05-18 2018-05-16T11:49:44Z 2018-05-16T11:49:44Z |
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 |
1467-8039 https://doi.org/10.1016/j.asd.2017.04.002 http://www.locus.ufv.br/handle/123456789/19602 |
identifier_str_mv |
1467-8039 |
url |
https://doi.org/10.1016/j.asd.2017.04.002 http://www.locus.ufv.br/handle/123456789/19602 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Volume 46, Issue 4, Pages 635-643, July 2017 |
dc.rights.driver.fl_str_mv |
Elsevier Ltd. info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Elsevier Ltd. |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
pdf application/pdf |
dc.publisher.none.fl_str_mv |
Arthropod Structure & Development |
publisher.none.fl_str_mv |
Arthropod Structure & Development |
dc.source.none.fl_str_mv |
reponame:LOCUS Repositório Institucional da UFV instname:Universidade Federal de Viçosa (UFV) instacron:UFV |
instname_str |
Universidade Federal de Viçosa (UFV) |
instacron_str |
UFV |
institution |
UFV |
reponame_str |
LOCUS Repositório Institucional da UFV |
collection |
LOCUS Repositório Institucional da UFV |
repository.name.fl_str_mv |
LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV) |
repository.mail.fl_str_mv |
fabiojreis@ufv.br |
_version_ |
1822610626248179712 |