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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: |
06/03/2003 |
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Data da última atualização: |
07/06/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PURCINO, A. A. C.; ALVES, V. M. C.; PARENTONI, S. N.; BELELE, C. L.; LOGUERCIO, L. L. |
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Afiliação: |
ANTONIO ALVARO CORSETTI PURCINO, CNPMS; VERA MARIA CARVALHO ALVES, CNPMS; SIDNEY NETTO PARENTONI, CNPMS. |
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Título: |
Aluminum effects of nitrogen uptake and nitrogen assimilating enzymes in maize genotypes with contra tolerance to aluminum toxicity. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Journal of Plant Nutriton, New York, v. 26, n. 1, p. 31-61, 2003. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to investigate the effect of aluminum (Al) on NO3- and NH4+ uptake and on activity/expression of the N- assimilating enzymes glutamine synthetase (GS1, GS2, and GSr isoforms, EC 6.3.1.2), glutamate synthase (NADH- GOGAT, EC 1.4.7.14; ferredoxin- GOGAT, EC 1.4.7.1), and glutamate dehydrogenase (GDH, EC 1.4.1.2) of maize (Zea mays L.) genotypes contrasting in tolerance to Al toxicity. Seeds were germinated on paper towels, screened for uniformity and allowed to grow for 5-6 d in a modified Steinberg nutrient solution, pH 5.5, in a glasshouse, under natural light. Immediately after transference to a growth chamber (12 h photoperiod, 26°C ± 0.5/18°C ± 0.9 day/night temperature, 72% RH and 540 µ Em-2 s-1 quantum flux density) Al stress was imposed by lowering pH to 4.5 and addition of 166 µmoles L-1 AlCl3. Control plants were grown in the same nutrient solution without Al, pH 4.5. Aluminum inhibited NO3- and NH4+ uptake and decreased shoot dry matter yield in all genotypes used in this investigation. Irrespective of their tolerance to Al toxicity, Al- treated plants had less nitrogen (N), phosphorus (P), calcium (Ca), magnesium (Mg), and sulfur (S) in their leaves. In roots, Al treatment did not affect dry matter weight but decreased accumulation of N, Ca, and Mg. Phosphorus and potassium (K) tended to accumulate in roots of Al- treated plants, suggesting that Al inhibited P translocation to the leaves. In roots, Al induced anaplerotic GDH and phosphoenolpyruvate carboxylase (PEPC, EC 4.1.1.31) activities, but inhibited GS activity. Moreover, in the apex (0-5 mm) and in the 6-15 mm segment of the elongation zone of most genotypes, Al tended to inhibit expression of GSr and favor expression of GS1. This increase in GS1 expression concomitantly with decreased N uptake and elevated deaminating GDH activity are indicative of metabolic changes usually associated with plant senescence. In leaves, Al did not influence GOGAT and GS activities and expression of GS isoforms suggesting it does not disturb assimilation of nitrogenous compounds translocated from roots to leaves. Nonetheless, lower leaf PEPC activity suggests that Al intoxicated plants had lower CO2- fixation rates. The inverse effect of Al treatment on the activities of GDH and PEPC in roots and leaves, indicates that whereas increased activities in roots were induced by stress related stimuli, decreased activities in leaves were caused by a reduced nitrogen supply to the leaves. Because the earliest effects observed in this investigation appeared only after 24 h of exposure to Al and were similar in both tolerant and sensitive genotypes, it is concluded that the changes observed in N uptake and assimilation into plant amino acids were downstream of the initial, primary Al toxicity event. MenosThe objective of this study was to investigate the effect of aluminum (Al) on NO3- and NH4+ uptake and on activity/expression of the N- assimilating enzymes glutamine synthetase (GS1, GS2, and GSr isoforms, EC 6.3.1.2), glutamate synthase (NADH- GOGAT, EC 1.4.7.14; ferredoxin- GOGAT, EC 1.4.7.1), and glutamate dehydrogenase (GDH, EC 1.4.1.2) of maize (Zea mays L.) genotypes contrasting in tolerance to Al toxicity. Seeds were germinated on paper towels, screened for uniformity and allowed to grow for 5-6 d in a modified Steinberg nutrient solution, pH 5.5, in a glasshouse, under natural light. Immediately after transference to a growth chamber (12 h photoperiod, 26°C ± 0.5/18°C ± 0.9 day/night temperature, 72% RH and 540 µ Em-2 s-1 quantum flux density) Al stress was imposed by lowering pH to 4.5 and addition of 166 µmoles L-1 AlCl3. Control plants were grown in the same nutrient solution without Al, pH 4.5. Aluminum inhibited NO3- and NH4+ uptake and decreased shoot dry matter yield in all genotypes used in this investigation. Irrespective of their tolerance to Al toxicity, Al- treated plants had less nitrogen (N), phosphorus (P), calcium (Ca), magnesium (Mg), and sulfur (S) in their leaves. In roots, Al treatment did not affect dry matter weight but decreased accumulation of N, Ca, and Mg. Phosphorus and potassium (K) tended to accumulate in roots of Al- treated plants, suggesting that Al inhibited P translocation to the leaves. In roots, Al induced anaplerotic GDH and phos... Mostrar Tudo |
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Thesagro: |
Alumínio; Milho. |
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Categoria do assunto: |
S Ciências Biológicas |
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Marc: |
LEADER 03449naa a2200193 a 4500
001 1486649
005 2018-06-07
008 2003 bl uuuu u00u1 u #d
100 1 $aPURCINO, A. A. C.
245 $aAluminum effects of nitrogen uptake and nitrogen assimilating enzymes in maize genotypes with contra tolerance to aluminum toxicity.$h[electronic resource]
260 $c2003
520 $aThe objective of this study was to investigate the effect of aluminum (Al) on NO3- and NH4+ uptake and on activity/expression of the N- assimilating enzymes glutamine synthetase (GS1, GS2, and GSr isoforms, EC 6.3.1.2), glutamate synthase (NADH- GOGAT, EC 1.4.7.14; ferredoxin- GOGAT, EC 1.4.7.1), and glutamate dehydrogenase (GDH, EC 1.4.1.2) of maize (Zea mays L.) genotypes contrasting in tolerance to Al toxicity. Seeds were germinated on paper towels, screened for uniformity and allowed to grow for 5-6 d in a modified Steinberg nutrient solution, pH 5.5, in a glasshouse, under natural light. Immediately after transference to a growth chamber (12 h photoperiod, 26°C ± 0.5/18°C ± 0.9 day/night temperature, 72% RH and 540 µ Em-2 s-1 quantum flux density) Al stress was imposed by lowering pH to 4.5 and addition of 166 µmoles L-1 AlCl3. Control plants were grown in the same nutrient solution without Al, pH 4.5. Aluminum inhibited NO3- and NH4+ uptake and decreased shoot dry matter yield in all genotypes used in this investigation. Irrespective of their tolerance to Al toxicity, Al- treated plants had less nitrogen (N), phosphorus (P), calcium (Ca), magnesium (Mg), and sulfur (S) in their leaves. In roots, Al treatment did not affect dry matter weight but decreased accumulation of N, Ca, and Mg. Phosphorus and potassium (K) tended to accumulate in roots of Al- treated plants, suggesting that Al inhibited P translocation to the leaves. In roots, Al induced anaplerotic GDH and phosphoenolpyruvate carboxylase (PEPC, EC 4.1.1.31) activities, but inhibited GS activity. Moreover, in the apex (0-5 mm) and in the 6-15 mm segment of the elongation zone of most genotypes, Al tended to inhibit expression of GSr and favor expression of GS1. This increase in GS1 expression concomitantly with decreased N uptake and elevated deaminating GDH activity are indicative of metabolic changes usually associated with plant senescence. In leaves, Al did not influence GOGAT and GS activities and expression of GS isoforms suggesting it does not disturb assimilation of nitrogenous compounds translocated from roots to leaves. Nonetheless, lower leaf PEPC activity suggests that Al intoxicated plants had lower CO2- fixation rates. The inverse effect of Al treatment on the activities of GDH and PEPC in roots and leaves, indicates that whereas increased activities in roots were induced by stress related stimuli, decreased activities in leaves were caused by a reduced nitrogen supply to the leaves. Because the earliest effects observed in this investigation appeared only after 24 h of exposure to Al and were similar in both tolerant and sensitive genotypes, it is concluded that the changes observed in N uptake and assimilation into plant amino acids were downstream of the initial, primary Al toxicity event.
650 $aAlumínio
650 $aMilho
700 1 $aALVES, V. M. C.
700 1 $aPARENTONI, S. N.
700 1 $aBELELE, C. L.
700 1 $aLOGUERCIO, L. L.
773 $tJournal of Plant Nutriton, New York$gv. 26, n. 1, p. 31-61, 2003.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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| Registros recuperados : 16 | |
| 2. |  | FERREIRA, V. M.; ANDRADE JÚNIOR, A. S. de; SILVA, C. R. da; MASCHIO, R. Consumo relativo de água pelo milho e pelo feijão-caupi, em sistema de cultivos solteiro e consorciado. Revista Brasileira de Agrometeorologia, Santa Maria, v. 16, n. 1, p. 96-106, abr. 2008.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - A |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 4. | | MASCHIO, R.; ANDRADE JÚNIOR, A. S.; MOTA, P. R. D.; MELO, F. B. Physical properties and soil degradation index in the "Plateau of Guadalupe irrigation district", Piauí state, Brazil. In: INTERNATIONAL CONFERENCE OF AGRICULTURAL ENGINEERING; BRAZILIAN CONGRESS OF AGRICULTURAL ENGINEERING, 37.; INTERNATIONAL LIVESTOCK ENVIRONMENT SYMPOSIUM, 8., 2008, Iguassu Falls. Technology for all: sharing the knowledge for development: proceedings. [Foz do Iguaçu]: CIGR, 2008. 4 p.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Meio-Norte. |
|  |
| 5. | | MASCHIO, R.; ANDRADE JÚNIOR, A. S.; DUARTE, J. A. L.; CARDOSO, M. J.; RIBEIRO, V. Q. Coeficientes de cultivo do sorgo em sistemas monocultivo e consorciado com feijão-caupi. In: CONGRESSO NACIONAL DE MILHO E SORGO, 27.; SIMPOSIO BRASILEIRO SOBRE A LAGARTA-DO-CARTUCHO , SPODOPTERA FRUGIPERDA, 3.; WORKSHOP SOBRE MANEJO E ETIOLOGIA DA MANCHA BRANCA DO MILHO, 2008, Londrina. Agroenergia, producao de alimentos e mudanças climáticas: desafios para milho e sorgo - trabalhos e palestras. [Londrina]: IAPAR; [Sete Lagoas]: Embrapa Milho e Sorgo, 2008. 5 p.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 6. | | MASCHIO, R.; ANDRADE JÚNIOR, A. S.; DUARTE, J. A. L.; CARDOSO, M. J.; RIBEIRO, V, Q. Coeficientes de cultivo do sorgo em sistemas monocultivo e consorciado com feijão-caupi. In: CONGRESSO NACIONAL DE MILHO E SORGO, 27.; SIMPOSIO BRASILEIRO SOBRE A LAGARTA-DO-CARTUCHO , SPODOPTERA FRUGIPERDA, 3.; WORKSHOP SOBRE MANEJO E ETIOLOGIA DA MANCHA BRANCA DO MILHO, 2008, Londrina. Agroenergia, producao de alimentos e mudanças climáticas: desafios para milho e sorgo: resumos. Londrina: IAPAR; [Sete Lagoas]: Embrapa Milho e Sorgo, 2008. p. 626| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 7. | | FERREIRA, V. M.; BASTOS, E. A.; ANDRADE JÚNIOR, A. S.; CARDOSO, M. J.; MASCHIO, R.; SILVA, E. M. Cowpea crop coefficient in Teresina, Piaui state, Brazil. In: INTERNATIONAL CONFERENCE OF AGRICULTURAL ENGINEERING; BRAZILIAN CONGRESS OF AGRICULTURAL ENGINEERING, 37.; INTERNATIONAL LIVESTOCK ENVIRONMENT SYMPOSIUM, 8., 2008, Iguassu Falls. Technology for all: sharing the knowledge for development: proceedings. [Foz do Iguaçu]: CIGR, 2008. 4 p.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 9. | | OLIVEIRA, S. R. M.; ANDRADE JUNIOR, A. S. de; RIBEIRO, J. L.; BARROS, M. A.; MASCHIO, R. Coeficientes de cultivo do algodoeiro herbáceo em sistemas monocultivo e consorciado com feijão-caupi. In: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 16., 2009, Belo Horizonte. Mudanças climáticas, recursos hídricos e energia para uma agricultura sustentável. Belo Horizonte: SBA; Viçosa: UFV; Sete Lagoas: Embrapa Milho e Sorgo, 2009. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 10. | | MASCHIO, R.; ANDRADE JUNIOR, A. S. de; FERREIRA, V. M.; BASTOS, E. A.; SILVA, C. R.; MORAIS, E. L. C. Coeficientes de cultivo do feijão-caupi em sistemas monocultivo e consorciado com milho. In: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 15., 2007, Aracaju. Efeito das mudanças climáticas na agricultura: anais. Campinas: Sociedade Brasileira de Agrometeorologia, 2007. 4 p. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 11. | | ANDRADE JUNIOR, A. S. de; MELO, F. de B.; MASCHIO, R.; RIBEIRO, V. Q.; BARROSO, M. A. Coeficientes de cultivo da mamoneira - BRS energia, em sistema monocultivo e consorciado com feijão-caupi. In: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 16., 2009, Belo Horizonte. Mudanças climáticas, recursos hídricos e energia para uma agricultura sustentável. Belo Horizonte: SBA; Viçosa: UFV; Sete Lagoas: Embrapa Milho e Sorgo, 2009. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 13. | | FERREIRA, V. M.; ANDRADE JUNIOR, A. S. de; MASCHIO, R.; CARDOSO, M. J.; SILVA, C. R.; MORAIS, E. L. C. Coeficientes de cultivo do milho em sistemas monocultivo e consorciado com feijão-caupi. In: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 15., 2007, Aracaju. Efeito das mudanças climáticas na agricultura: anais. Campinas: Sociedade Brasileira de Agrometeorologia, 2007. 4 p. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 14. | | ANDRADE JUNIOR, A. S. de; OLIVEIRA, S. R. M.; RIBEIRO, V. Q.; RIBEIRO, J. L.; MASCHIO, R. Índice de satisfação da necessidade de água do algodoeiro herbáceo em sistemas monocultivo e consorciado com feijão-caupi. In: CONGRESSO BRASILEIRO DE AGROMETEOROLOGIA, 16., 2009, Belo Horizonte. Mudanças climáticas, recursos hídricos e energia para uma agricultura sustentável. Belo Horizonte: SBA; Viçosa: UFV; Sete Lagoas: Embrapa Milho e Sorgo, 2009. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
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| 16. | | OLIVEIRA, D. B. de; LACERDA, J. J. de J.; CAVALCANTE, A. P.; BEZERRA, K. G.; SILVA, A. P. M. da; MIRANDA, A. C. G.; RAMBO, T. P.; MASCHIO, R.; ANDRADE, H. A. F. de; COSTA, P. M.; SOUSA, C. A. F. de; OLIVEIRA JUNIOR, J. O. L. de; SAGRILO, E.; SOUZA, H. A. de. Lime and gypsum rates effects in new soybean areas in the cerrado of Matopiba, Brazil. Agriculture, v. 14, n. 7, 1034, 2024.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 3 |
| Biblioteca(s): Embrapa Meio-Norte. |
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| Registros recuperados : 16 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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