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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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| Registros recuperados : 96 | |
| 1. |  | MEYER, M.; GODOY, C.; VENANCIO, W.; TERAMOTO, A. Manejo equilibrado. Cultivar Grandes Culturas, Pelotas, v. 14, n. 165, Caderno Técnico Soja, p. 3-7, fev. 2013.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 4 |
| Biblioteca(s): Embrapa Soja. |
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| 3. | | MEYER, M. C.; CAMPOS, H. D.; NUNES JUNIOR, J.; VENANCIO, W. S.; GODOY, C. V. Chemical control of white mold (Sclerotinia sclerotiorum) on soybean in Brazil. Acta Phytopathologica Sinica, v. 43, Supp., p. 137, 2013. Edition of the Abstracts 10th International Congress of Plant Pathology, Beijing, Aug. 2013.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 4. | | VENÂNCIO, W. L.; PRABHU, A. S.; SILVA, G. B. da; FILIPPI, M. C. Avaliação de resistência de planta adulta nas cultivares de arroz irrigado à Pyricularia grisea. Fitopatologia Brasileira, v. 31, p. S218, ago. 2006. Suplemento, ref. 0386. Edição de resumos do XXXIX Congresso Brasileiro de Fitopatologia, Salvador, BA, ago. 2006.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 5. | | SILVA, G. B.; VENÂNCIO, W. L.; PRABHU, A. S.; FILIPPI, M. C. C.; MORAIS, O. P. Herança da resistência a brusone nas folhas nas cultivares diferenciadoras brasileiras. In: CONGRESSO BRASILEIRO DA CADEIA PRODUTIVA DE ARROZ, 2.; REUNIÃO NACIONAL DE PESQUISA DE ARROZ, 8., 2006, Brasília, DF. Anais... Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2006. (Embrapa Arroz e Feijão. Documentos, 196).| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 7. | | MENDES, C. A.; VENÂNCIO, W. L.; SILVA, G. B.; FILIPPI, M. C.; PRABHU, A. S. Eficiência do fungicida trifloxystrobin + propiconazole no controle da brusone nas panículas em arroz de terras altas. Fitopatologia Brasileira, v. 30, p. S115, ago. 2005. Suplemento, ref. 357. Edição de Resumos do XXXVIII Congresso Brasileiro de Fitopatologia, Brasília, DF, ago. 2005.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 9. | | VENÂNCIO, W. S.; BEGLIOMINI, E.; RODRIGUES, M. A. T.; MEYER, M. C.; BUFFARA, M. A. Desempenho do fungicida BAS 512 14F no controle químico da ferrugem asiática da soja (Phakopsora pachyrhizi). Tropical Plant Pathology, Brasília, DF, v. 34, p. S112, ago. 2009. Suplemento, ref. 411. Edição dos Resumos do XLII Congresso Brasileiro de Fitopatologia; Annual Meeting of the Brazilian Phytopathological Society, Rio de Janeiro, ago. 2009.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 10. | | FERREIRA, L. C.; MEYER, M. C.; TERAMOTO, A.; VENANCIO, W. S. Efeito de fungicidas na inibição do crescimento micelial de Sclerotinia sclerotiorum isolado de soja. In: CONGRESSO BRASILEIRO DE SOJA, 5.; MERCOSOJA 2009, Goiânia. Resumos... Londrina: Embrapa Soja, 2009. p. 161, trab. 284. Editado por Adilson de Oliveira Júnior, Odilon Ferreira Saraiva, Clara Beatriz Hoffmann Campo, César de Castro.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 11. | | VENÂNCIO, W. S.; BEGLIOMINI, E.; RODRIGUES, M. A. T.; MEYER, M. C.; BUFFARA, M. A. Manejo de cercosporiose (Cercospora zeae-maydis) em milho (Zea mayz): efeito da época de controle sobre a produtividade. Tropical Plant Pathology, Brasília, DF, v. 34, p. S112, ago. 2009. Suplemento, ref. 412. Edição dos Resumos do XLII Congresso Brasileiro de Fitopatologia; Annual Meeting of the Brazilian Phytopathological Society, Rio de Janeiro, ago. 2009.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 12. | | SILVA, G. B.; ARAÚJO, L. G.; PRABHU, A. S.; VENÂNCIO, W. L. Linhagens de IAC 201 resistentes à brusone. In: CONGRESSO BRASILEIRO DA CADEIA PRODUTIVA DE ARROZ, 2.; REUNIÃO NACIONAL DE PESQUISA DE ARROZ, 8., 2006, Brasília, DF. Anais... Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2006. (Embrapa Arroz e Feijão. Documentos, 196).| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 13. | | PRABHU, A. S.; FILIPPI, M. C.; SILVA-LOBO, V.; SILVA, G. B.; VENÂNCIO, W. L. Relação entre teor de clorofila nas folhas e a severidade de brusone nas panículas em arroz de terras altas. Fitopatologia Brasileira, Brasília, DF, v. 32, p. S 198, ago. 2007. Suplemento. ref. 0444. Edição dos Resumos do XL Congresso Brasileiro de Fitopatologia, Maringá, PR, ago. 2007.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 14. | | MARZAROTTO, F. O.; VENANCIO, W. S.; SCAPIN, C. R.; BEGLIOMINI, E.; MEYER, M. C.; VENANCIO, R. M. Avaliação do controle de oídio (Microsphaeria diffusa) em soja (Glycine max) com diferentes doses dos fungicidas piraclostrobina + epoxiconazol e piraclostrobina 130 g.L-1 + metaconazol 80 g.L-1. Tropical Plant Pathology, Brasília, DF, v. 35, p. S117, ago. 2010. Suplemento, Ref. 03.171. Edição das palestras e resumos de trabalhos apresentados no 43 Congresso Brasileiro de Fitopatologia; do 43 Annual Meeting Of The Brazilian Phytopathology Society, Cuiabá, ago. 2010.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 15. | | MEYER, M. C.; COSTA, N. B.; FERREIRA, L. C.; NUNES JÚNIOR, J.; VENANCIO, W. S.; BEGLIOMINI, E. Comparison of the efficiency of soybean rust control by preventive and curative fungicides sprays, combined with different adjuvants, in Brazil. Plant Management Network, St. Paul, 2010. Edição do Proceedings do National Soybean Rust Symposium, New Orleans, 2009.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 17. | | SILVA-LOBO, V. L.; FILIPPI, M. C. C.; SILVA, G. B.; VENANCIO, W. L.; PRABHU, A. S. Relação entre o teor de clorofila nas folhas e a severidade de brusone nas panículas em arroz de terras altas. Tropical Plant Pathology, Brasília, DF, v. 37, n. 1, p. 83-87, jan./fev. 2012.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 18. | | MEYER, M. C.; PIMENTA, C. B.; NUNES SOBRINHO, J. B.; FERREIRA, L. C.; COSTA, N. B.; ANDRADE, P. J. M.; NUNES JÚNIOR, J.; VENÂNCIO, W. S. Controle químico da ferrugem asiática da soja (Phakopsora pachyrhizi) em Goiás, com fungicidas indicados para o controle da doença. Tropical Plant Pathology, Brasília, DF, v. 34, p. S106, ago. 2009. Suplemento, ref. 389. Edição dos Resumos do XLII Congresso Brasileiro de Fitopatologia; Annual Meeting of the Brazilian Phytopathological Society, Rio de Janeiro, ago. 2009.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| 19. | | VENANCIO, W. L.; PRABHU, A. S.; LACERDA, M. da G. A.; FILIPPI, M. C.; LOBO, V. L. S.; SILVA, L. P. S. Avaliação de resistência de planta adulta nas cultivares de arroz irrigado à Magnaporthe grisea. In: CONGRESSO BRASILEIRO DE ARROZ IRRIGADO, 5.; REUNIÃO DA CULTURA DO ARROZ IRRIGADO, 27., 2007, Pelotas. Anais... Pelotas: Embrapa Clima Temperado, 2007. v.1. p. 694-695.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 20. | | MEYER, M. C.; NUNES JUNIOR, J.; PIMENTA, C. B.; COSTA, N. B.; GURNIERI, S.; SEII, A.; NUNES SOBRINHO, J.; VENANCIO, W. S.; GODOY, C. V. Fungicides performance on the control of asian soybean rust (Phakopsora pachyrhizi) in Goias State, Brazil. In: PLANT MANAGEMENT NETWORK; FIELD CROPS RUST SYMPOSIUM, San Antonio, 2011. Proceedings ... Saint Paul: APS: ASA: CSSA: 2011. Abstract, 21. Disponível em: < http://www.plantmanagementnetwork.org/proceedings/FCRS/2011/posters/>.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Soja. |
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| Registros recuperados : 96 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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