Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)

Detalhes bibliográficos
Autor(a) principal: Mendes-Bonato,Andréa Beatriz
Data de Publicação: 2003
Outros Autores: Risso-Pascotto,Claudicéia, Pagliarini,Maria Suely, Valle,Cacilda Borges do
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Genetics and Molecular Biology
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000400016
Resumo: Cytogenetic studies were carried out on 22 accessions of Brachiaria jubata from the Embrapa Beef Cattle Brachiaria collection. One accession was diploid (2n = 2x = 18) and the remaining 21 were tetraploid (2n = 4x = 36). Among five tetraploid accessions, a specific and constant pattern of cell fusion involving only two microsporocytes was recorded. Meiosis proceeded normally from prophase I to the end, giving rise to an octad with normal microspores that developed into fertile pollen grains. Regular octad formation was possible because each cellular chromosome set was maintained in its proper domain, spindles were correctly positioned, and cytokinesis planes were formed in the correct places. Such behavior of meiosis in syncytes has never been reported in any other plant species.
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spelling Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)Brachiaria jubatacell fusionmicrosporogenesispollen fertilityCytogenetic studies were carried out on 22 accessions of Brachiaria jubata from the Embrapa Beef Cattle Brachiaria collection. One accession was diploid (2n = 2x = 18) and the remaining 21 were tetraploid (2n = 4x = 36). Among five tetraploid accessions, a specific and constant pattern of cell fusion involving only two microsporocytes was recorded. Meiosis proceeded normally from prophase I to the end, giving rise to an octad with normal microspores that developed into fertile pollen grains. Regular octad formation was possible because each cellular chromosome set was maintained in its proper domain, spindles were correctly positioned, and cytokinesis planes were formed in the correct places. Such behavior of meiosis in syncytes has never been reported in any other plant species.Sociedade Brasileira de Genética2003-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000400016Genetics and Molecular Biology v.26 n.4 2003reponame:Genetics and Molecular Biologyinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/S1415-47572003000400016info:eu-repo/semantics/openAccessMendes-Bonato,Andréa BeatrizRisso-Pascotto,ClaudicéiaPagliarini,Maria SuelyValle,Cacilda Borges doeng2004-04-06T00:00:00Zoai:scielo:S1415-47572003000400016Revistahttp://www.gmb.org.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||editor@gmb.org.br1678-46851415-4757opendoar:2004-04-06T00:00Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)false
dc.title.none.fl_str_mv Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)
title Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)
spellingShingle Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)
Mendes-Bonato,Andréa Beatriz
Brachiaria jubata
cell fusion
microsporogenesis
pollen fertility
title_short Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)
title_full Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)
title_fullStr Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)
title_full_unstemmed Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)
title_sort Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)
author Mendes-Bonato,Andréa Beatriz
author_facet Mendes-Bonato,Andréa Beatriz
Risso-Pascotto,Claudicéia
Pagliarini,Maria Suely
Valle,Cacilda Borges do
author_role author
author2 Risso-Pascotto,Claudicéia
Pagliarini,Maria Suely
Valle,Cacilda Borges do
author2_role author
author
author
dc.contributor.author.fl_str_mv Mendes-Bonato,Andréa Beatriz
Risso-Pascotto,Claudicéia
Pagliarini,Maria Suely
Valle,Cacilda Borges do
dc.subject.por.fl_str_mv Brachiaria jubata
cell fusion
microsporogenesis
pollen fertility
topic Brachiaria jubata
cell fusion
microsporogenesis
pollen fertility
description Cytogenetic studies were carried out on 22 accessions of Brachiaria jubata from the Embrapa Beef Cattle Brachiaria collection. One accession was diploid (2n = 2x = 18) and the remaining 21 were tetraploid (2n = 4x = 36). Among five tetraploid accessions, a specific and constant pattern of cell fusion involving only two microsporocytes was recorded. Meiosis proceeded normally from prophase I to the end, giving rise to an octad with normal microspores that developed into fertile pollen grains. Regular octad formation was possible because each cellular chromosome set was maintained in its proper domain, spindles were correctly positioned, and cytokinesis planes were formed in the correct places. Such behavior of meiosis in syncytes has never been reported in any other plant species.
publishDate 2003
dc.date.none.fl_str_mv 2003-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000400016
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000400016
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1415-47572003000400016
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Genética
publisher.none.fl_str_mv Sociedade Brasileira de Genética
dc.source.none.fl_str_mv Genetics and Molecular Biology v.26 n.4 2003
reponame:Genetics and Molecular Biology
instname:Sociedade Brasileira de Genética (SBG)
instacron:SBG
instname_str Sociedade Brasileira de Genética (SBG)
instacron_str SBG
institution SBG
reponame_str Genetics and Molecular Biology
collection Genetics and Molecular Biology
repository.name.fl_str_mv Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)
repository.mail.fl_str_mv ||editor@gmb.org.br
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