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 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
24/02/2016 |
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Data da última atualização: |
16/10/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
EPRON, D.; CABRAL, O. M. R.; LACLAU, J.-P.; DANNOURA, M.; PACKER, A. P.; PLAIN, C.; BATTIE-LACLAU, P.; MOREIRA, M. Z.; TRIVELIN, P. C. O.; BOUILLET, J-P.; GÉRANT, D.; NOUVELLON, Y. |
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Afiliação: |
DANIEL EPRON, Université de Lorraine; OSVALDO MACHADO RODRIGUES CABRAL, CNPMA; JEAN-PAUL LACLAU, CIRAD; MASAKO DANNOURA, Kyoto University; ANA PAULA CONTADOR PACKER, CNPMA; CAROLINE PLAIN, INRA; PATRICIA BATTIE-LACLAU, CENA-USP; MARCELO ZACHARIAS MOREIRA, CENA-USP; PAULO CESAR OCHEUZE TRIVELIN, CENA-USP; JEAN-PIERRE BOUILLET, ESALQ-USP; DOMINIQUE GERANT, Université de Lorraine; YANN NOUVELLON, IAG-USP. |
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Título: |
In situ 13CO2 pulse labelling of field-grown eucalypt trees revealed the effects of potassium nutrition and throughfall exclusion on phloem transport of photosynthetic carbon. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Tree Physiology, Oxford, v. 36, n. 1, p. 6-21, 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Potassium (K) is an important limiting factor of tree growth, but little is known of the effects of K supply on the long-distance transport of photosynthetic carbon (C) in the phloem and of the interaction between K fertilization and drought. We pulselabelled 2-year-old Eucalyptus grandis L. trees grown in a field trial combining K fertilization (+K and -K) and throughfall exclusion (+W and -W), and we estimated the velocity of C transfer by comparing time lags between the uptake of 13CO2 and its recovery in trunk CO2 efflux recorded at different heights. We also analysed the dynamics of the labelled photosynthates recovered in the foliage and in the phloem sap (inner bark extract). The mean residence time of labelled C in the foliage was short (21?31 h). The time series of 13C in excess in the foliage was affected by the level of fertilization, whereas the effect of throughfall exclusion was not significant. The velocity of C transfer in the trunk (0.20?0.82 m h-1) was twice as high in +K trees than in -K trees, with no significant effect of throughfall exclusion except for one +K -W tree labelled in the middle of the drought season that was exposed to a more pronounced water stress (midday leaf water potential of -2.2 MPa). Our results suggest that besides reductions in photosynthetic C supply and in C demand by sink organs, the lower velocity under K deficiency is due to a lower cross-sectional area of the sieve tubes, whereas an increase in phloem sap viscosity is more likely limiting phloem transport under drought. In all treatments, 10 times less 13C was recovered in inner bark extracts at the bottom of the trunk when compared with the base of the crown, suggesting that a large part of the labelled assimilates has been exported out of the phloem and replaced by unlabelled C. This supports the ?leakage-retrieval mechanism? that may play a role in maintaining the pressure gradient between source and sink organs required to sustain high velocity of phloem transport in tall trees. MenosAbstract: Potassium (K) is an important limiting factor of tree growth, but little is known of the effects of K supply on the long-distance transport of photosynthetic carbon (C) in the phloem and of the interaction between K fertilization and drought. We pulselabelled 2-year-old Eucalyptus grandis L. trees grown in a field trial combining K fertilization (+K and -K) and throughfall exclusion (+W and -W), and we estimated the velocity of C transfer by comparing time lags between the uptake of 13CO2 and its recovery in trunk CO2 efflux recorded at different heights. We also analysed the dynamics of the labelled photosynthates recovered in the foliage and in the phloem sap (inner bark extract). The mean residence time of labelled C in the foliage was short (21?31 h). The time series of 13C in excess in the foliage was affected by the level of fertilization, whereas the effect of throughfall exclusion was not significant. The velocity of C transfer in the trunk (0.20?0.82 m h-1) was twice as high in +K trees than in -K trees, with no significant effect of throughfall exclusion except for one +K -W tree labelled in the middle of the drought season that was exposed to a more pronounced water stress (midday leaf water potential of -2.2 MPa). Our results suggest that besides reductions in photosynthetic C supply and in C demand by sink organs, the lower velocity under K deficiency is due to a lower cross-sectional area of the sieve tubes, whereas an increase in phloem sap viscosity... Mostrar Tudo |
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Palavras-Chave: |
Carbon isotope; Carbon transfer; v. |
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Thesagro: |
Carbono; Eucalipto; Eucalyptus Grandis; Fertilizante potássico; Seca. |
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Thesaurus Nal: |
Eucalyptus; Potassium fertilizers. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03126naa a2200373 a 4500
001 2038387
005 2020-10-16
008 2016 bl uuuu u00u1 u #d
100 1 $aEPRON, D.
245 $aIn situ 13CO2 pulse labelling of field-grown eucalypt trees revealed the effects of potassium nutrition and throughfall exclusion on phloem transport of photosynthetic carbon.$h[electronic resource]
260 $c2016
520 $aAbstract: Potassium (K) is an important limiting factor of tree growth, but little is known of the effects of K supply on the long-distance transport of photosynthetic carbon (C) in the phloem and of the interaction between K fertilization and drought. We pulselabelled 2-year-old Eucalyptus grandis L. trees grown in a field trial combining K fertilization (+K and -K) and throughfall exclusion (+W and -W), and we estimated the velocity of C transfer by comparing time lags between the uptake of 13CO2 and its recovery in trunk CO2 efflux recorded at different heights. We also analysed the dynamics of the labelled photosynthates recovered in the foliage and in the phloem sap (inner bark extract). The mean residence time of labelled C in the foliage was short (21?31 h). The time series of 13C in excess in the foliage was affected by the level of fertilization, whereas the effect of throughfall exclusion was not significant. The velocity of C transfer in the trunk (0.20?0.82 m h-1) was twice as high in +K trees than in -K trees, with no significant effect of throughfall exclusion except for one +K -W tree labelled in the middle of the drought season that was exposed to a more pronounced water stress (midday leaf water potential of -2.2 MPa). Our results suggest that besides reductions in photosynthetic C supply and in C demand by sink organs, the lower velocity under K deficiency is due to a lower cross-sectional area of the sieve tubes, whereas an increase in phloem sap viscosity is more likely limiting phloem transport under drought. In all treatments, 10 times less 13C was recovered in inner bark extracts at the bottom of the trunk when compared with the base of the crown, suggesting that a large part of the labelled assimilates has been exported out of the phloem and replaced by unlabelled C. This supports the ?leakage-retrieval mechanism? that may play a role in maintaining the pressure gradient between source and sink organs required to sustain high velocity of phloem transport in tall trees.
650 $aEucalyptus
650 $aPotassium fertilizers
650 $aCarbono
650 $aEucalipto
650 $aEucalyptus Grandis
650 $aFertilizante potássico
650 $aSeca
653 $aCarbon isotope
653 $aCarbon transfer
653 $av
700 1 $aCABRAL, O. M. R.
700 1 $aLACLAU, J.-P.
700 1 $aDANNOURA, M.
700 1 $aPACKER, A. P.
700 1 $aPLAIN, C.
700 1 $aBATTIE-LACLAU, P.
700 1 $aMOREIRA, M. Z.
700 1 $aTRIVELIN, P. C. O.
700 1 $aBOUILLET, J-P.
700 1 $aGÉRANT, D.
700 1 $aNOUVELLON, Y.
773 $tTree Physiology, Oxford$gv. 36, n. 1, p. 6-21, 2016.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
16/11/2018 |
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Data da última atualização: |
28/06/2019 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SOUSA, I. I.; SIQUEIRA, F.; SANTIAGO, G. G.; ROMERO, A. R.; TORRES JUNIOR, R. A. de A.; FEIJO, G. L. D.; SOUZA JÚNIOR, M. D.; FERRAZ, A. L. J.; GRISOLIA, A. B.; FARIA, F. J. C. |
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Afiliação: |
Isadora Inácio Sousa, Universidade Federal do Mato Grosso do Sul - UFMS; FABIANE SIQUEIRA, CNPGC; Universidade Federal do Mato Grosso do Sul - UFMS; Universidade Estadual Paulista Júlio de Mesquita Filho - Unesp; ROBERTO AUGUSTO DE A TORRES JUNIOR, CNPGC; GELSON LUIS DIAS FEIJO, CNPGC; Associação Brasileira de Criadores de Canchim - ABCCAN; Professor da Universidade Estadual de Mato Grosso do Sul - UEMS; Professora da Universidade Federal da Grande Dourados - UFGD; Professor da Universidade Federal de Mato Grosso do Sul - UFMS. |
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Título: |
Seleção de genes candidatos associados à características de produção em bovinos da raça Canchim. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
In: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 14., 2018, Campo Grande - MS. [Resumos dos trabalhos]. Brasília, DF, Embrapa, 2018 115 p. (Embrapa Gado de Corte. Documentos, 258). |
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Páginas: |
P. 54-55 |
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Idioma: |
Português |
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Conteúdo: |
Sabe-se que a qualidade de um produto é o fator fundamental para que o mesmo possa ser inserido no mercado e o setor brasileiro de carne bovina tem se preocupado não só com o aumento da produção, mas também com a qualidade da carne produzida. Desta forma, produtores buscam obter a melhoria de características como a quantidade de gordura subcutânea e entremeada, ganho de peso, além da pelagem e da circunferência escrotal. Logo, objetivou-se realizar a seleção de genes candidatos via análise funcional de genes obtidos em regiões genômicas identificadas por estudos de associação ampla do genoma (GWAS) em animais da raça Canchim. |
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Palavras-Chave: |
Aumento da produção; Circunferência escrotal; Qualidade da carne produzida. |
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Thesagro: |
Ganho de Peso. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/186208/1/Selecao-de-genes-candidatos-associados.pdf
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Marc: |
LEADER 01636nam a2200277 a 4500
001 2099530
005 2019-06-28
008 2018 bl uuuu u00u1 u #d
100 1 $aSOUSA, I. I.
245 $aSeleção de genes candidatos associados à características de produção em bovinos da raça Canchim.$h[electronic resource]
260 $aIn: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 14., 2018, Campo Grande - MS. [Resumos dos trabalhos]. Brasília, DF, Embrapa, 2018 115 p. (Embrapa Gado de Corte. Documentos$c2018
300 $aP. 54-55
520 $aSabe-se que a qualidade de um produto é o fator fundamental para que o mesmo possa ser inserido no mercado e o setor brasileiro de carne bovina tem se preocupado não só com o aumento da produção, mas também com a qualidade da carne produzida. Desta forma, produtores buscam obter a melhoria de características como a quantidade de gordura subcutânea e entremeada, ganho de peso, além da pelagem e da circunferência escrotal. Logo, objetivou-se realizar a seleção de genes candidatos via análise funcional de genes obtidos em regiões genômicas identificadas por estudos de associação ampla do genoma (GWAS) em animais da raça Canchim.
650 $aGanho de Peso
653 $aAumento da produção
653 $aCircunferência escrotal
653 $aQualidade da carne produzida
700 1 $aSIQUEIRA, F.
700 1 $aSANTIAGO, G. G.
700 1 $aROMERO, A. R.
700 1 $aTORRES JUNIOR, R. A. de A.
700 1 $aFEIJO, G. L. D.
700 1 $aSOUZA JÚNIOR, M. D.
700 1 $aFERRAZ, A. L. J.
700 1 $aGRISOLIA, A. B.
700 1 $aFARIA, F. J. C.
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