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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
05/07/2013 |
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Data da última atualização: |
19/05/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
COELHO FILHO, M. A.; COLEBROOK, E. H.; LLOYD, D. P. A.; WEBSTER, C. P.; MOONEY, S. J.; PHILLIPS, A. L.; HEDDEN, P.; WHALLEY, W. R. |
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Afiliação: |
MAURICIO ANTONIO COELHO FILHO, CNPMF; ELLEN H. COLEBROOK, ROTHAMSTED RESEARCH; DAVID P. A. LLOYD, ROTHAMSTED RESEARCH; UNIVERSITY OF NOTTINGHAM; COLIN P. WEBSTER, ROTHAMSTED RESEARCH; SACHA J. MOONEY, UNIVERSITY OF NOTTINGHAM; ANDREW L. PHILLIPS, ROTHAMSTED RESEARCH; PETER HEDDEN, ROTHAMSTED RESEARCH; WILLIAM R. WHALLEY, ROTHAMSTED RESEARCH. |
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Título: |
The involvement of gibberellin signalling in the effect of soil resistance to root penetration on leaf elongation and tiller number in wheat. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Plant ad Soil, March 2013. |
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DOI: |
10.1007/s11104-013-1662-8 |
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Idioma: |
Inglês |
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Conteúdo: |
Background and aims The concept of root-sourced chemical signals that affect shoot growth in response to drought is widely reported; in particular the role of ABA in regulating stomatal conductance has received much attention. ABA, alone, does not fully explain all the effects of abiotic stresses in the root zone on shoot architecture. An increase in mechanical impedance, which can occur on even relatively modest soil drying, results in reduced root and shoot growth, processes that are potentially regulated by gibberellins (GAs). Methods In this study we explored the role of mechanical impedance and exogenous gibberellin (GA3) on root and shoot architecture in wheat seedlings containing the Rht-B1a (tall), Rht-B1b (semi-dwarf) or Rht-B1c (dwarf) alleles in the April-Bearded or Mercia backgrounds. Our experiments were based on the use of the sand culture system which allows the mechanical impedance of the root growth environment to remain constant and independent of water and nutrient availability. We investigated the effects of the application of exogenous GA3 to the root system. Results We found that impeding soil reduced leaf elongation in the tall and semi-dwarf lines, confirming the stunting effect of mechanical impedance which is widely reported. However, leaf elongation in the dwarf lines was not affected by root impedance. Application of GA3 to the roots restored leaf elongation in the tall and semi-dwarf lines growing in impeding soil, with some growth response even in the dwarf line, the longest leaves being obtained when GA was applied to impeded roots of a tall line. Both exogenous GA and root impedance reduced the number of tillers, but there was no interaction with the Rht genotype. The genetic background did not affect the results. Conclusion We suggest that the GA signaling pathway has an unidentified role in the leaf elongation response to mechanical impedance to root growth. MenosBackground and aims The concept of root-sourced chemical signals that affect shoot growth in response to drought is widely reported; in particular the role of ABA in regulating stomatal conductance has received much attention. ABA, alone, does not fully explain all the effects of abiotic stresses in the root zone on shoot architecture. An increase in mechanical impedance, which can occur on even relatively modest soil drying, results in reduced root and shoot growth, processes that are potentially regulated by gibberellins (GAs). Methods In this study we explored the role of mechanical impedance and exogenous gibberellin (GA3) on root and shoot architecture in wheat seedlings containing the Rht-B1a (tall), Rht-B1b (semi-dwarf) or Rht-B1c (dwarf) alleles in the April-Bearded or Mercia backgrounds. Our experiments were based on the use of the sand culture system which allows the mechanical impedance of the root growth environment to remain constant and independent of water and nutrient availability. We investigated the effects of the application of exogenous GA3 to the root system. Results We found that impeding soil reduced leaf elongation in the tall and semi-dwarf lines, confirming the stunting effect of mechanical impedance which is widely reported. However, leaf elongation in the dwarf lines was not affected by root impedance. Application of GA3 to the roots restored leaf elongation in the tall and semi-dwarf lines growing in impeding soil, with some growth response even ... Mostrar Tudo |
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Palavras-Chave: |
Alongamento foliar. |
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Thesagro: |
Solo; Trigo. |
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Thesaurus Nal: |
Soil; Wheat. |
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Categoria do assunto: |
-- |
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Marc: |
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001 1961541
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008 2013 bl uuuu u00u1 u #d
024 7 $a10.1007/s11104-013-1662-8$2DOI
100 1 $aCOELHO FILHO, M. A.
245 $aThe involvement of gibberellin signalling in the effect of soil resistance to root penetration on leaf elongation and tiller number in wheat.$h[electronic resource]
260 $c2013
520 $aBackground and aims The concept of root-sourced chemical signals that affect shoot growth in response to drought is widely reported; in particular the role of ABA in regulating stomatal conductance has received much attention. ABA, alone, does not fully explain all the effects of abiotic stresses in the root zone on shoot architecture. An increase in mechanical impedance, which can occur on even relatively modest soil drying, results in reduced root and shoot growth, processes that are potentially regulated by gibberellins (GAs). Methods In this study we explored the role of mechanical impedance and exogenous gibberellin (GA3) on root and shoot architecture in wheat seedlings containing the Rht-B1a (tall), Rht-B1b (semi-dwarf) or Rht-B1c (dwarf) alleles in the April-Bearded or Mercia backgrounds. Our experiments were based on the use of the sand culture system which allows the mechanical impedance of the root growth environment to remain constant and independent of water and nutrient availability. We investigated the effects of the application of exogenous GA3 to the root system. Results We found that impeding soil reduced leaf elongation in the tall and semi-dwarf lines, confirming the stunting effect of mechanical impedance which is widely reported. However, leaf elongation in the dwarf lines was not affected by root impedance. Application of GA3 to the roots restored leaf elongation in the tall and semi-dwarf lines growing in impeding soil, with some growth response even in the dwarf line, the longest leaves being obtained when GA was applied to impeded roots of a tall line. Both exogenous GA and root impedance reduced the number of tillers, but there was no interaction with the Rht genotype. The genetic background did not affect the results. Conclusion We suggest that the GA signaling pathway has an unidentified role in the leaf elongation response to mechanical impedance to root growth.
650 $aSoil
650 $aWheat
650 $aSolo
650 $aTrigo
653 $aAlongamento foliar
700 1 $aCOLEBROOK, E. H.
700 1 $aLLOYD, D. P. A.
700 1 $aWEBSTER, C. P.
700 1 $aMOONEY, S. J.
700 1 $aPHILLIPS, A. L.
700 1 $aHEDDEN, P.
700 1 $aWHALLEY, W. R.
773 $tPlant ad Soil, March 2013.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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| 41. |  | PEREIRA, F. de M.; MEIRELLES, R. N.; SOBREIRA, R. dos S. Alimentação complementar. In: DRUMOND, P. M.; CARVALHO-ZILSE, G. A.; WITTER, S.; ALVES, R. M. de O.; DRUMMOND, M. S. (ed.). Meliponicultura: o produtor pergunta, a Embrapa responde. Brasília, DF: Embrapa, 2024. p. 141-155, Cap.13| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 42. | | SILVA, A. B. S.; SOUZA, B. de A.; PEREIRA, F. de M.; FERRY, G. R. A. Avaliação da viabilidade do peso em colônias de tiúba Melipona fasciculata como fator determinante de qualidade em avaliações de rotina. In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA MEIO-NORTE, 7., 2021, Teresina, PI. Anais... Teresina: Embrapa Meio-Norte, 2023. (Embrapa Meio-Norte. Documentos, 287). p. 16.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 45. | | SILVA, G. R. da; PEREIRA, F. de M.; SOUZA, B. de A.; LOPES, M. T. do R.; DINIZ, F. M. Pesquisas com abelhas-sem-ferrão (Hymenoptera: Meliponini) e aplicabilidade dos marcadores moleculares: uma revisão sistemática da literatura. PUBVET, v. 13, n. 1, a250, p. 1-19, Jan. 2019.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 3 |
| Biblioteca(s): Embrapa Caprinos e Ovinos; Embrapa Meio-Norte. |
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| 46. | | PEREIRA, L. A.; MORAES, J. I. da S.; MEIRELLES, R. N.; PEREIRA, F. de M.; LOPES, M. T. do R. Plantas poliníferas visitadas por Melipona fasciculata Smith, 1854, em região do cerrado piauiense em período de estiagem. In: JORNADA CIENTÍFICA DA EMBRAPA MEIO-NORTE, 2., 2016, Teresina. Anais da II Jornada Científica da Embrapa Meio-Norte. Teresina: Embrapa Meio-Norte, 2016. p. 112-115.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 50. | | COSTA, C. S. L. da; PEREIRA, F. de M.; LOPES, M. T. do R.; SOUZA, B. de A. Caracterização físico-química de geoprópolis de Melipona fasciculata Smith (tiúba). In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA MEIO-NORTE, 4., 2018, Teresina, PI. Anais da IV Jornada Científica da Embrapa Meio-Norte. Brasília, DF: Embrapa, 2018. p. 21.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 51. | | TORRES, M. B. L. A.; BARRETO, A. L. H.; COSTA, P. H. M.; ALVES, T. L.; PEREIRA, F. de M. Caracterização físico-química e palinológica de mel de Apis mellifera de municípios do Piauí e Timon, MA. In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA MEIO-NORTE, 8., 2022, Teresina, PI. Anais... Teresina: Embrapa Meio-Norte, 2023. p. 28. (Embrapa Meio-Norte. Documentos, 291).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 54. | | ALVES, T. L.; SOUZA, B. de A.; PEREIRA, F. de M.; LOPES, M. T. do R.; MOURA, V. G. de. Comportamento de rainhas de abelhas Apis mellifera do nascimento às primeiras posturas. In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA MEIO-NORTE, 9., 2023, Teresina, PI. Anais... Teresina: Embrapa Meio-Norte, 2024. p. 46. (Embrapa Meio-Norte. Eventos técnicos & científicos, 1).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
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| Registros recuperados : 174 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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