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Registro Completo |
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
18/03/2014 |
Data da última atualização: |
18/03/2014 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
SPOSITO, E. C.; ABREU, L. S. de. |
Afiliação: |
LUCIMAR SANTIAGO DE ABREU, CNPMA. |
Título: |
Estudo da produção e de mercador dos sistemas agroalimentares de base ecológica de Vitória-ES. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Cadernos de Agroecologia, Cruz Alta, v. 8, n. 2, 2013. Resumo 15154. Edição dos resumos do VIII Congresso Brasileiro de Agroecologia, Porto Alegre, 2013. |
Idioma: |
Português |
Thesagro: |
Agricultura orgânica; Mercado. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00578naa a2200145 a 4500 001 1982757 005 2014-03-18 008 2013 bl --- 0-- u #d 100 1 $aSPOSITO, E. C. 245 $aEstudo da produção e de mercador dos sistemas agroalimentares de base ecológica de Vitória-ES.$h[electronic resource] 260 $c2013 650 $aAgricultura orgânica 650 $aMercado 700 1 $aABREU, L. S. de 773 $tCadernos de Agroecologia, Cruz Alta$gv. 8, n. 2, 2013. Resumo 15154. Edição dos resumos do VIII Congresso Brasileiro de Agroecologia, Porto Alegre, 2013.
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Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
Biblioteca(s): |
Embrapa Agricultura Digital; Embrapa Recursos Genéticos e Biotecnologia. |
Data corrente: |
16/11/2011 |
Data da última atualização: |
01/03/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
SILVEIRA, E. D.; GUIMARÃES, L. A.; DUSI, D. M. de A.; SILVA, F. R. da; MARTINS, N. F.; COSTA, M. M. do C.; ALVES-FERREIRA, M.; CARNEIRO, V. T. de C. |
Afiliação: |
ÉRICA DUARTE SILVEIRA, UFRJ; LARISSA ARRAIS GUIMARÃES, UNB; DIVA MARIA DE ALENCAR DUSI, CENARGEN; FELIPE RODRIGUES DA SILVA, CNPTIA; NATALIA FLORENCIO MARTINS, CENARGEN; MARCOS MOTA DO CARMO COSTA, CENARGEN; MÁRCIO ALVES-FERREIRA, UFRJ; VERA TAVARES DE CAMPOS CARNEIRO, CENARGEN. |
Título: |
Expressed sequence-tag analysis of ovaries of Brachiaria brizantha reveals genes associated with the early steps of embryo sac differentiation of apomictic plants. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
Plant Cell Reports, v. 31, p. 403-416, 2012. |
Idioma: |
Inglês |
Conteúdo: |
Abstract - In apomixis, asexual mode of plant reproduction through seeds, an unreduced megagametophyte is formed due to circumvented or altered meiosis. The embryo develops autonomously from the unreduced egg cell, independently of fertilization. Brachiaria is a genus of tropical forage grasses that reproduces sexually or by apomixis. A limited number of studies have reported the sequencing of apomixis-related genes and a few Brachiaria sequences have been deposited at genebank databases. This work shows sequencing and expression analyses of expressed sequence-tags (ESTs) of Brachiaria genus and points to transcripts from ovaries with preferential expression at megasporogenesis in apomictic plants. From the 11 differentially expressed sequences from immature ovaries of sexual and apomictic Brachiaria brizantha obtained from macroarray analysis, 9 were preferentially detected in ovaries of apomicts, as con?rmed by RT-qPCR. A putative involvement in early steps of Panicum-type embryo sac differentiation of four sequences from B. brizantha ovaries: BbrizHelic, BbrizRan, BbrizSec13 and BbrizSti1 is suggested. Two of these, BbrizSti1 and BbrizHelic, with similarity to a gene coding to stress induced protein and a helicase, respectively, are preferentially expressed in the early stages of apomictic ovaries development, especially in the nucellus, in a stage previous to the differentiation of aposporous initials, as veri?ed by in situ hybridization. |
Palavras-Chave: |
Forage grass; Gramíneas forrageiras; Reprodução de planta. |
Thesagro: |
Genética. |
Thesaurus NAL: |
Apomixis; Expressed sequence tags; Forage grasses; Genetics; Plant reproduction; Urochloa brizantha. |
Categoria do assunto: |
-- S Ciências Biológicas |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/156133/1/art3A10.10072Fs00299-011-1175-y.pdf
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Marc: |
LEADER 02485naa a2200325 a 4500 001 1938024 005 2023-03-01 008 2012 bl uuuu u00u1 u #d 100 1 $aSILVEIRA, E. D. 245 $aExpressed sequence-tag analysis of ovaries of Brachiaria brizantha reveals genes associated with the early steps of embryo sac differentiation of apomictic plants.$h[electronic resource] 260 $c2012 520 $aAbstract - In apomixis, asexual mode of plant reproduction through seeds, an unreduced megagametophyte is formed due to circumvented or altered meiosis. The embryo develops autonomously from the unreduced egg cell, independently of fertilization. Brachiaria is a genus of tropical forage grasses that reproduces sexually or by apomixis. A limited number of studies have reported the sequencing of apomixis-related genes and a few Brachiaria sequences have been deposited at genebank databases. This work shows sequencing and expression analyses of expressed sequence-tags (ESTs) of Brachiaria genus and points to transcripts from ovaries with preferential expression at megasporogenesis in apomictic plants. From the 11 differentially expressed sequences from immature ovaries of sexual and apomictic Brachiaria brizantha obtained from macroarray analysis, 9 were preferentially detected in ovaries of apomicts, as con?rmed by RT-qPCR. A putative involvement in early steps of Panicum-type embryo sac differentiation of four sequences from B. brizantha ovaries: BbrizHelic, BbrizRan, BbrizSec13 and BbrizSti1 is suggested. Two of these, BbrizSti1 and BbrizHelic, with similarity to a gene coding to stress induced protein and a helicase, respectively, are preferentially expressed in the early stages of apomictic ovaries development, especially in the nucellus, in a stage previous to the differentiation of aposporous initials, as veri?ed by in situ hybridization. 650 $aApomixis 650 $aExpressed sequence tags 650 $aForage grasses 650 $aGenetics 650 $aPlant reproduction 650 $aUrochloa brizantha 650 $aGenética 653 $aForage grass 653 $aGramíneas forrageiras 653 $aReprodução de planta 700 1 $aGUIMARÃES, L. A. 700 1 $aDUSI, D. M. de A. 700 1 $aSILVA, F. R. da 700 1 $aMARTINS, N. F. 700 1 $aCOSTA, M. M. do C. 700 1 $aALVES-FERREIRA, M. 700 1 $aCARNEIRO, V. T. de C. 773 $tPlant Cell Reports$gv. 31, p. 403-416, 2012.
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