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Registros recuperados : 2 | |
1. | | BRITO, K. R.; GOMES, F. R.; SANTOS, J. J. S.; LOPES, N. S.; FREITAS, L. J. M. de. Incremento diamétrico e volumétrico de uma floresta manejada na Amazônia Oriental após colheita da madeira. In: CONGRESSO NACIONAL DE BOTÂNICA, 68.; JORNADA FLUMINENSE DE BOTÂNICA, 36., 2017, Rio de Janeiro. Anais... [Brasília, DF]: Sociedade Botânica do Brasil, 2017. Biblioteca(s): Embrapa Amazônia Oriental. |
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2. | | GOMES, F. R.; BRITO, K. R.; SANTOS, J. J. S.; LOPES, N. S.; FREITAS, L. J. M. de. Recrutamento e mortalidade em uma floresta tropical doze anos após colheita na Amazônia Oriental. In: CONGRESSO NACIONAL DE BOTÂNICA, 68.; JORNADA FLUMINENSE DE BOTÂNICA, 36., 2017, Rio de Janeiro. Anais... [Brasília, DF]: Sociedade Botânica do Brasil, 2017. Biblioteca(s): Embrapa Amazônia Oriental. |
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Registros recuperados : 2 | |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Gado de Corte. |
Data corrente: |
10/07/2009 |
Data da última atualização: |
25/07/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
BOLDRINI, K. R.; PAGLIARINI, M. S.; VALLE, C. B. do. |
Afiliação: |
KELLEN REGINA BOLDRINI, UNIVERSIDADE ESTADUAL DE MARINGÁ; MARIA SUELY PAGLIARINI, UNIVERSIDADE ESTADUAL DE MARINGÁ; CACILDA BORGES DO VALLE, CNPGC. |
Título: |
Abnormal timing of cytokinesis in microsporogenesis in Brachiaria humidicola (Poaceae: Paniceae). |
Ano de publicação: |
2006 |
Fonte/Imprenta: |
Journal of Genetics, Bangalore, v. 85, n. 3, p. 225-228, Dec. 2006 |
Idioma: |
Inglês |
Notas: |
Research note. |
Conteúdo: |
Meiosis is controlled by a large number of genes, generally dominant, whose expression is stage-specific, site-specific and time-specific (Gottschalk and Kaul 1974, 1980a,b; Baker et al. 1976; Golubovskaya 1979, 1989). Among genes acting in the meiotic process, those responsible for the partitioning of the cytoplasm after nuclear division play a very important role in the formation of viable gametes. After two rounds of chromosome segregation (karyokinesis) and one simultaneous or two successive cytoplasmic divisions (cytokinesis), the final product of male meiosis in flowering plants emerges as a tetrad of haploid microspores enclosed in a callose wall. The timing of cytokinesis varies among angiosperms. In most monocot plants, cytokinesis is successive, i.e. one partitioning of the cytoplasm occurs after telophase I and another after telophase II, so that there is a distinct dyad stage. However, in most dicots, it is simultaneous and occurs after telophase II (Peirson et al. 1996). Many meiosis mutations affecting the pattern of cytokinesis have been reported in higher plants (Peirson et al. 1996). In Brachiaria, a promising African genus of forage grass for the Brazilian savannas, absence of cytokinesis leading to 2n microspores and binucleated or tetranucleated microspores have been reported in B. brizantha (Risso-Pascotto et al. 2003) and B. nigropedata (Utsunomiya et al. 2005). The present study details meiotic and postmeiotic abnormalities related to cytokinesis observed in one accession of B. humidicola. MenosMeiosis is controlled by a large number of genes, generally dominant, whose expression is stage-specific, site-specific and time-specific (Gottschalk and Kaul 1974, 1980a,b; Baker et al. 1976; Golubovskaya 1979, 1989). Among genes acting in the meiotic process, those responsible for the partitioning of the cytoplasm after nuclear division play a very important role in the formation of viable gametes. After two rounds of chromosome segregation (karyokinesis) and one simultaneous or two successive cytoplasmic divisions (cytokinesis), the final product of male meiosis in flowering plants emerges as a tetrad of haploid microspores enclosed in a callose wall. The timing of cytokinesis varies among angiosperms. In most monocot plants, cytokinesis is successive, i.e. one partitioning of the cytoplasm occurs after telophase I and another after telophase II, so that there is a distinct dyad stage. However, in most dicots, it is simultaneous and occurs after telophase II (Peirson et al. 1996). Many meiosis mutations affecting the pattern of cytokinesis have been reported in higher plants (Peirson et al. 1996). In Brachiaria, a promising African genus of forage grass for the Brazilian savannas, absence of cytokinesis leading to 2n microspores and binucleated or tetranucleated microspores have been reported in B. brizantha (Risso-Pascotto et al. 2003) and B. nigropedata (Utsunomiya et al. 2005). The present study details meiotic and postmeiotic abnormalities related to cytokinesis obser... Mostrar Tudo |
Palavras-Chave: |
Braquiária; Microsporogênese. |
Thesagro: |
Brachiaria Humidicola; Gramínea Forrageira; Melhoramento Genético Vegetal; Pastagem; Poliploidia. |
Thesaurus NAL: |
Cytokinesis; Forage grasses; Meiosis; Microsporogenesis; Polyploidy. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02404naa a2200301 a 4500 001 1327021 005 2023-07-25 008 2006 bl uuuu u00u1 u #d 100 1 $aBOLDRINI, K. R. 245 $aAbnormal timing of cytokinesis in microsporogenesis in Brachiaria humidicola (Poaceae$bPaniceae). 260 $c2006 500 $aResearch note. 520 $aMeiosis is controlled by a large number of genes, generally dominant, whose expression is stage-specific, site-specific and time-specific (Gottschalk and Kaul 1974, 1980a,b; Baker et al. 1976; Golubovskaya 1979, 1989). Among genes acting in the meiotic process, those responsible for the partitioning of the cytoplasm after nuclear division play a very important role in the formation of viable gametes. After two rounds of chromosome segregation (karyokinesis) and one simultaneous or two successive cytoplasmic divisions (cytokinesis), the final product of male meiosis in flowering plants emerges as a tetrad of haploid microspores enclosed in a callose wall. The timing of cytokinesis varies among angiosperms. In most monocot plants, cytokinesis is successive, i.e. one partitioning of the cytoplasm occurs after telophase I and another after telophase II, so that there is a distinct dyad stage. However, in most dicots, it is simultaneous and occurs after telophase II (Peirson et al. 1996). Many meiosis mutations affecting the pattern of cytokinesis have been reported in higher plants (Peirson et al. 1996). In Brachiaria, a promising African genus of forage grass for the Brazilian savannas, absence of cytokinesis leading to 2n microspores and binucleated or tetranucleated microspores have been reported in B. brizantha (Risso-Pascotto et al. 2003) and B. nigropedata (Utsunomiya et al. 2005). The present study details meiotic and postmeiotic abnormalities related to cytokinesis observed in one accession of B. humidicola. 650 $aCytokinesis 650 $aForage grasses 650 $aMeiosis 650 $aMicrosporogenesis 650 $aPolyploidy 650 $aBrachiaria Humidicola 650 $aGramínea Forrageira 650 $aMelhoramento Genético Vegetal 650 $aPastagem 650 $aPoliploidia 653 $aBraquiária 653 $aMicrosporogênese 700 1 $aPAGLIARINI, M. S. 700 1 $aVALLE, C. B. do 773 $tJournal of Genetics, Bangalore$gv. 85, n. 3, p. 225-228, Dec. 2006
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