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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com rosangela.lacerda@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
14/12/2005 |
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Data da última atualização: |
30/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PINEROS, M. A.; SHAFF, J. E.; MANSLANK, H. S.; ALVES, V. M. C.; KOCHIAN, L. V. |
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Afiliação: |
VERA MARIA CARVALHO ALVES, CNPMS. |
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Título: |
Aluminum resistance in maize cannot be solely explained by root organic acid exudation. A comparative physiological study. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Plant Physiology, Bethesda, v. 137, n. 1, p. 231-241, 2005. |
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Idioma: |
Inglês |
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Conteúdo: |
Root apical aluminum (Al) exclusion via Al-activated root citrate exudation is widely accepted as the main Al-resistance mechanism operating in maize (Zea mays) roots. Nonetheless, the correlation between Al resistance and this Al-exclusion mechanism has not been tested beyond a very small number of Al-resistant and Al-sensitive maize lines. In this study, we conducted a comparative study of the physiology of Al resistance using six different maize genotypes that capture the range of maize Al resistance and differ significantly in their genetic background (three Brazilian and three North American genotypes). In these maize lines, we were able to establish a clear correlation between root tip Al exclusion (based on root Al content) and Al resistance. Both Al-resistant genotypes and three of the four Al-sensitive lines exhibited a significant Al-activated citrate exudation, with no evidence for Al activation of root malate or phosphate release. There was a lack of correlation between differential Al resistance and root citrate exudation for the six maize genotypes; in fact, one of the Al-sensitive lines, Mo17, had the largest Al-activated citrate exudation of all of the maize lines. Our results indicate that although root organic acid release may play a role in maize Al resistance, it is clearly not the only or the main resistance mechanism operating in these maize roots. A number of other potential Al-resistance mechanisms were investigated, including release of other Al-chelating ligands, Al-induced alkalinization of rhizosphere pH, changes in internal levels of Al-chelating compounds in the root, and Al translocation to the shoot. However, we were unsuccessful in identifying additional Al-resistance mechanisms in maize. It is likely that a purely physiological approach may not be sufficient to identify these novel Al-resistance mechanisms in maize and this will require an interdisciplinary approach integrating genetic, molecular, and physiological investigations. MenosRoot apical aluminum (Al) exclusion via Al-activated root citrate exudation is widely accepted as the main Al-resistance mechanism operating in maize (Zea mays) roots. Nonetheless, the correlation between Al resistance and this Al-exclusion mechanism has not been tested beyond a very small number of Al-resistant and Al-sensitive maize lines. In this study, we conducted a comparative study of the physiology of Al resistance using six different maize genotypes that capture the range of maize Al resistance and differ significantly in their genetic background (three Brazilian and three North American genotypes). In these maize lines, we were able to establish a clear correlation between root tip Al exclusion (based on root Al content) and Al resistance. Both Al-resistant genotypes and three of the four Al-sensitive lines exhibited a significant Al-activated citrate exudation, with no evidence for Al activation of root malate or phosphate release. There was a lack of correlation between differential Al resistance and root citrate exudation for the six maize genotypes; in fact, one of the Al-sensitive lines, Mo17, had the largest Al-activated citrate exudation of all of the maize lines. Our results indicate that although root organic acid release may play a role in maize Al resistance, it is clearly not the only or the main resistance mechanism operating in these maize roots. A number of other potential Al-resistance mechanisms were investigated, including release of other Al-chel... Mostrar Tudo |
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Thesagro: |
Milho. |
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Categoria do assunto: |
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Marc: |
LEADER 02573naa a2200181 a 4500
001 1489062
005 2018-05-30
008 2005 bl uuuu u00u1 u #d
100 1 $aPINEROS, M. A.
245 $aAluminum resistance in maize cannot be solely explained by root organic acid exudation. A comparative physiological study.$h[electronic resource]
260 $c2005
520 $aRoot apical aluminum (Al) exclusion via Al-activated root citrate exudation is widely accepted as the main Al-resistance mechanism operating in maize (Zea mays) roots. Nonetheless, the correlation between Al resistance and this Al-exclusion mechanism has not been tested beyond a very small number of Al-resistant and Al-sensitive maize lines. In this study, we conducted a comparative study of the physiology of Al resistance using six different maize genotypes that capture the range of maize Al resistance and differ significantly in their genetic background (three Brazilian and three North American genotypes). In these maize lines, we were able to establish a clear correlation between root tip Al exclusion (based on root Al content) and Al resistance. Both Al-resistant genotypes and three of the four Al-sensitive lines exhibited a significant Al-activated citrate exudation, with no evidence for Al activation of root malate or phosphate release. There was a lack of correlation between differential Al resistance and root citrate exudation for the six maize genotypes; in fact, one of the Al-sensitive lines, Mo17, had the largest Al-activated citrate exudation of all of the maize lines. Our results indicate that although root organic acid release may play a role in maize Al resistance, it is clearly not the only or the main resistance mechanism operating in these maize roots. A number of other potential Al-resistance mechanisms were investigated, including release of other Al-chelating ligands, Al-induced alkalinization of rhizosphere pH, changes in internal levels of Al-chelating compounds in the root, and Al translocation to the shoot. However, we were unsuccessful in identifying additional Al-resistance mechanisms in maize. It is likely that a purely physiological approach may not be sufficient to identify these novel Al-resistance mechanisms in maize and this will require an interdisciplinary approach integrating genetic, molecular, and physiological investigations.
650 $aMilho
700 1 $aSHAFF, J. E.
700 1 $aMANSLANK, H. S.
700 1 $aALVES, V. M. C.
700 1 $aKOCHIAN, L. V.
773 $tPlant Physiology, Bethesda$gv. 137, n. 1, p. 231-241, 2005.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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| Registros recuperados : 9 | |
| 2. |  | GLATZLE, S.; GIESE, M.; STURZ, S.; PEREIRA, M.; ALMEIDA, R. G. de; ASCH, F. Effects of shading and soil moisture on brachiaria brizantha biomass in an integrated crop-livestock-forestry system. In: TROPENTAG 2019: INTERNATIONAL CONFERENCE ON RESEARCH ON FOOD SECURITY, NATURAL RESOURCE MANAGEMENT AND RURAL DEVELOPMENT, Kassel, 2019. Filling gaps and removing traps for sustainable resources management: book of abstracts. Göttingen: Cuvilier, 2019 p. 297| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 3. | | GIESE, M.; GLATZLE, S.; ASCH, F.; ALMEIDA, R. G. de; MACEDO, M. C. M.; PEREIRA, M. Dinâmica da água em sistemas de integração lavoura-pecuária-floresta. In: BUNGENSTAB, D. J.; ALMEIDA, R. G. de; LAURA, V. A.; BALBINO, L. C.; FERREIRA, A. D. (Ed.). ILPF: inovação com integração de lavoura, pecuária e floresta. Brasília, DF: Embrapa, 2019. 835 p. p. 195-223| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 4. | | GLATZLE, S.; HUBNER, S.; PEREIRA, M.; GIESE, M.; ALMEIDA, R. G. de; ASCH, F. Soil moisture and microclimate in integrated soil moisture and microclimate in integrated Crop-Livestock-Forestry Systems of Central West Brazil. In: TROPENTAG 2017: INTERNATIONAL CONFERENCE ON RESEARCH ON FOOD SECURITY, NATURAL RESOURCE MANAGEMENT AND RURAL DEVELOPMENT, Bonn, 2017. Future agriculture: social-ecological transitions and bio-cultural shifts: book of abstracts. Bonn: Universität of Bonn, 2017.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 5. | | PEREIRA, M.; GLATZLE, S.; SANTOS, V. A. C.; ALVES, F. V.; ALMEIDA, R. G. de; MORAIS, M. da G. Beef Cattle Production in Brazilian Integrated Systems. In: TROPENTAG, 2018: INTERNATIONAL CONFERENCE ON RESEARCH ON FOOD SECURITY, NATURAL RESOURCE MANAGEMENT AND RURAL DEVELOPMENT, Ghent, 2018. Global food security and food safety: the role of universities: book of abstracts. Ghent: Ghent University, 2018. 594 p. Editor: Eric Tielkes.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 6. | | PEREIRA, M.; MORAIS, M. da G.; FERNANDES, P. B.; SANTOS, V. A. C. dos; GLATZLE, S.; ALMEIDA, R. G. de. Beef cattle production on Piatã grass pastures in silvopastoral systems. Tropical Grasslands-Forrajes Tropicales, v. 9, n. 1, p. 1-12, 2021.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 7. | | SANTOS, V. A. C.; SANTOS, P. M.; ALMEIDA, R. G. de; LAURA, V. A.; PEREIRA, M.; GLATZLE, S. Respostas fisiológicas e estruturais do capim-piatã sob níveis de sombreamento em sistemas de integração na época seca. In: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 13., 2017, Campo Grande, MS. [Anais...] Brasília, DF: Embrapa, 2017. p. 104. (Embrapa Gado de Corte, Documentos, 242)| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Gado de Corte; Embrapa Pecuária Sudeste. |
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| 8. | | PEREIRA, M.; GLATZLE, S.; DOS SANTOS, V. A. C.; MORAIS, M. da G.; SANTOS, J. M. de F.; ALMEIDA, R. G. de. Brachiaria brizantha cv. BRS Piatã forage yield under integrated crop-livestock-forestry systems in Brazil. In: TROPENTAG 2016: INTERNATIONAL CONFERENCE ON RESEARCH ON FOOD SECURITY, NATURAL RESOURCE MANAGEMENT AND RURAL DEVELOPMENT, Vienna, 2016. Solidarity in a competing world - fair use of resources: book of abstracts. Göttingen: Cuvillier, 2016.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 9. | | GLATZLE, S.; STUERZ, S.; GIESE, M.; PEREIRA, M.; ALMEIDA, R. G. de; BUNGENSTAB, D. J.; MACEDO, M. C. M.; ASCH, F. Seasonal Dynamics of Soil Moisture in an Integrated-Crop-Livestock-Forestry System in Central-West Brazil. Agriculture, v. 11,n. 245, 2021.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 9 | |
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