Testicular, spermatogenesis and sperm morphology in Martarega bentoi (Heteroptera: Notonectidae)

Detalhes bibliográficos
Autor(a) principal: Novais, Ademária M.
Data de Publicação: 2017
Outros Autores: Dias, Glenda, Lino-Neto, José
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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spelling 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
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