| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Milho e Sorgo. |
|
Data corrente: |
02/09/1998 |
|
Data da última atualização: |
13/07/2018 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
PURCINO, A. A. C.; ARELLANO, C.; ATHWAL, G. S.; HUBER, S. C. |
|
Afiliação: |
ANTONIO ALVARO CORSETTI PURCINO, CNPMS. |
|
Título: |
Nitrate effect on carbon and nitrogen assimilating enzymes of maize hybrids representing seven eras of breeding. |
|
Ano de publicação: |
1998 |
|
Fonte/Imprenta: |
Maydica, Bergamo, v. 43, n. 2, p. 83-94, 1998. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The objective of this study was to determine possible differences in the carbon and nitrogen metabolism of 14 maize era hybrids released since 1930. Plants fed 1.6 mM N03- had nitrate reductase activity (NRA) comparable to plants fed 16 mM N03- but did not sustain maximum NRA, and had reduced growth. Nitrate reductase (NR) and sucrose phosphate synthase (SPS) activities were not related to year of hybrid release. However, the activation states of NR under low nitrate, and of SPS under high nitrate increased up to 1970 and then leveled off. This suggests a trend towards increased efficiency for both No3- reduction in low nitrate plants, and sucrose synthesis in high nitrate plants. Chloroplastic glutamine synthetase (GS2) protein did not respond to NO3- supply and was not related to year of hybrid release. However, cytosolic glutamine synthetase (GS1) protein was higher in low nitrate plants compared to high nitrate plants. Furthermore, in low nitrate plants, GS1 protein correlated negatively to NRA indicating that its role was to remobilize N compounds Phosphoenophyruvate carboxylase (PEPC) activity responded to increased No3- supply and increased up to 1970's declining thereafter. In most hybrids, PEPC specific activity (activity mg-1 protein .s-1) was higher in the high nitrate plants. The specific activities of NR, SPS and glutamate dehydrogenase (GDH) tended to be lower in high nitrate plants, although SPS and GDH activities, expressed on a g fresh weight basis, responded to increased nitrate supply. These observations support the hypothesis that PEPC protein is preferentially increased during the estabhishment of the C4 syndrome GDH activity declined over the last 70 years in the low nitrate plants. A negative correlation was found between GDH specific activity and GS2 protein in the high nitrate plants. When trends in enzyme activity were examined over time, it was observed that from the 1930's to the 1970's breeding for increased grain yield indirectly selected plants with increased PEPC activity and more activated NR and SPS. This trend was not observed in hybrids released during the 1930's and 1990's, indicating thar increments in grain yield observed during these last two decades were not due to additional enhancements in nitrate reduction, primary carbon fixation and sucrose metabolism. MenosThe objective of this study was to determine possible differences in the carbon and nitrogen metabolism of 14 maize era hybrids released since 1930. Plants fed 1.6 mM N03- had nitrate reductase activity (NRA) comparable to plants fed 16 mM N03- but did not sustain maximum NRA, and had reduced growth. Nitrate reductase (NR) and sucrose phosphate synthase (SPS) activities were not related to year of hybrid release. However, the activation states of NR under low nitrate, and of SPS under high nitrate increased up to 1970 and then leveled off. This suggests a trend towards increased efficiency for both No3- reduction in low nitrate plants, and sucrose synthesis in high nitrate plants. Chloroplastic glutamine synthetase (GS2) protein did not respond to NO3- supply and was not related to year of hybrid release. However, cytosolic glutamine synthetase (GS1) protein was higher in low nitrate plants compared to high nitrate plants. Furthermore, in low nitrate plants, GS1 protein correlated negatively to NRA indicating that its role was to remobilize N compounds Phosphoenophyruvate carboxylase (PEPC) activity responded to increased No3- supply and increased up to 1970's declining thereafter. In most hybrids, PEPC specific activity (activity mg-1 protein .s-1) was higher in the high nitrate plants. The specific activities of NR, SPS and glutamate dehydrogenase (GDH) tended to be lower in high nitrate plants, although SPS and GDH activities, expressed on a g fresh weight basis, responde... Mostrar Tudo |
|
Palavras-Chave: |
Maize; Nitrate. |
|
Thesagro: |
Carbono; Melhoramento; Milho; Nitrato; Nitrogênio; Zea Mays. |
|
Thesaurus Nal: |
breeding; carbon; metabolism; nitrogen. |
|
Categoria do assunto: |
S Ciências Biológicas |
|
Marc: |
LEADER 03133naa a2200301 a 4500
001 1480503
005 2018-07-13
008 1998 bl uuuu u00u1 u #d
100 1 $aPURCINO, A. A. C.
245 $aNitrate effect on carbon and nitrogen assimilating enzymes of maize hybrids representing seven eras of breeding.$h[electronic resource]
260 $c1998
520 $aThe objective of this study was to determine possible differences in the carbon and nitrogen metabolism of 14 maize era hybrids released since 1930. Plants fed 1.6 mM N03- had nitrate reductase activity (NRA) comparable to plants fed 16 mM N03- but did not sustain maximum NRA, and had reduced growth. Nitrate reductase (NR) and sucrose phosphate synthase (SPS) activities were not related to year of hybrid release. However, the activation states of NR under low nitrate, and of SPS under high nitrate increased up to 1970 and then leveled off. This suggests a trend towards increased efficiency for both No3- reduction in low nitrate plants, and sucrose synthesis in high nitrate plants. Chloroplastic glutamine synthetase (GS2) protein did not respond to NO3- supply and was not related to year of hybrid release. However, cytosolic glutamine synthetase (GS1) protein was higher in low nitrate plants compared to high nitrate plants. Furthermore, in low nitrate plants, GS1 protein correlated negatively to NRA indicating that its role was to remobilize N compounds Phosphoenophyruvate carboxylase (PEPC) activity responded to increased No3- supply and increased up to 1970's declining thereafter. In most hybrids, PEPC specific activity (activity mg-1 protein .s-1) was higher in the high nitrate plants. The specific activities of NR, SPS and glutamate dehydrogenase (GDH) tended to be lower in high nitrate plants, although SPS and GDH activities, expressed on a g fresh weight basis, responded to increased nitrate supply. These observations support the hypothesis that PEPC protein is preferentially increased during the estabhishment of the C4 syndrome GDH activity declined over the last 70 years in the low nitrate plants. A negative correlation was found between GDH specific activity and GS2 protein in the high nitrate plants. When trends in enzyme activity were examined over time, it was observed that from the 1930's to the 1970's breeding for increased grain yield indirectly selected plants with increased PEPC activity and more activated NR and SPS. This trend was not observed in hybrids released during the 1930's and 1990's, indicating thar increments in grain yield observed during these last two decades were not due to additional enhancements in nitrate reduction, primary carbon fixation and sucrose metabolism.
650 $abreeding
650 $acarbon
650 $ametabolism
650 $anitrogen
650 $aCarbono
650 $aMelhoramento
650 $aMilho
650 $aNitrato
650 $aNitrogênio
650 $aZea Mays
653 $aMaize
653 $aNitrate
700 1 $aARELLANO, C.
700 1 $aATHWAL, G. S.
700 1 $aHUBER, S. C.
773 $tMaydica, Bergamo$gv. 43, n. 2, p. 83-94, 1998.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 13 | |
| 2. |  | MELO, JOÃO PAULO DOS SANTOS DE; SANTOS, T. R. dos; PINHEIRO, L. R. B.; SILVA, H. S. A. Crescimento de mudas, micropropagadas de abacaxizeiro e bananeira, em substrato suplementado com rizobactérias. In: JORNADA CIENTÍFICA EMBRAPA MANDIOCA E FRUTICULTURA, 8., 2014, Cruz das Almas, Ba. Pesquisa: despertando mentes para a inovação e transformando o futuro: [anais]. Cruz das Almas, BA, Embrapa Mandioca e Fruticultura, 2014.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
|    |
| 3. | | FREITAS, T. da G. R.; BORGHI, E.; KARAM, D.; SILVA, J. R. O.; SANTOS, T. R. dos. Produção de silagem no sistema Antecipe em Sete Lagoas, região central de Minas Gerais - safra 2023/2024. In: CONGRESSO NACIONAL DE MILHO E SORGO, 34., 2024, Palmas, TO. Sistemas de produção em fronteiras agrícolas: resumos. Sete Lagoas: Associação Brasileira de Milho e Sorgo, 2025. p. 170. p. 170.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Milho e Sorgo; Embrapa Pecuária Sudeste. |
| |
| 6. | | SANTOS, T. R. dos; MELO, J. P. dos S. de; PINHEIRO, L. R. B.; SILVA, H. S. A. Rizobactérias como agentes de biocontrole de Fusarium oxysporum f. sp. passiflora e comportamento em diferentes níveis de pH e umidade. In: JORNADA CIENTÍFICA EMBRAPA MANDIOCA E FRUTICULTURA, 8., 2014, Cruz das Almas, Ba. Pesquisa: despertando mentes para a inovação e transformando o futuro : [anais]. Cruz das Almas, BA, Embrapa Mandioca e Fruticultura, 2014.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
| |
| 7. | | BUZZULIN, C.; SOBRINHO, A. G. da S.; COSTA, A. J. da; SANTOS, T. R. dos; BORGES, F. A.; SOARES, V. E. Eficácia anti-helmíntica comparativa da associação albendazole, levamisole e ivermectina à moxidectina em ovinos Pesquisa Agropecuária Brasileira, Brasília, DF, v. 42, n. 6, p. 891-895, jun. 2007 Título em inglês: Comparative anthelmintic efficacy of the association albendazol, levamisol and ivermectin to moxidectin in sheep.| Biblioteca(s): Embrapa Unidades Centrais. |
| |
| 8. | | JESUS, D. O. S. de; SANTOS, T. R. dos; GONÇALVES, J. S.; TRÓCOLI, R. O.; PINHEIRO, L. R. B.; SILVA, H. S. A. Crescimento de mudas de talo de abacaxizeiro 'Imperial' em substrato suplementado com rizobactérias produtoras de ácido indolacético. In: JORNADA CIENTÍFICA EMBRAPA MANDIOCA E FRUTICULTURA, 9., 2015: Cruz das Almas, BA. Pesquisa: para quê? para quem? : resumos. Brasília, DF : Embrapa, 2015.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
| |
| 9. | | GUIMARÃES, N. N.; GONÇALVES, A. H.; KARAM, D.; GUIMARÃES, L. N.; SILVA, J. R. O.; ROCHA, T. da G.; SANTOS, T. R. dos; INOUE, T. Y. Levantamento fitossociológico de plantas daninhas em sistema de cultivo intercalar soja-plantas de cobertura e milho em sucessão. Contribuciones a Las Ciencias Sociales, v. 17, n. 4, e6450, 2024.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 4 |
| Biblioteca(s): Embrapa Milho e Sorgo. |
| |
| 10. | | CARDOSO, R. M.; SANTOS, T. R. dos; SOUSA, M. A. de; BRASIL, E. P. F.; LEANDRO, W. M.; FERREIRA, E. P. de B. Promoção de crescimento do arroz inoculado com Rhizobium e Azospirillum submetido à fonte de fosfato natural. In: REUNIÃO CENTRO-OESTE DE CIÊNCIA DO SOLO, 5.; SIMPÓSIO DE NUTRIÇÃO DE PLANTAS NO CERRADO, 2., 2018, Goiânia. Uso eficiente de nutrientes e adubação de sistemas agrícolas: resumos. Goiânia: UFG, 2018. p. 106-107.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
| |
| 11. | | SANTOS, T. R. dos; CUSTÓDIO, I. G.; BORGHI, E.; KARAM, D.; TRINDADE, R. dos S.; GUIMARAES, P. E. de O.; GUIMARAES, L. J. M. Variação fenotípica na resposta de cultivares de milho ao dano mecânico. In: CONGRESSO NACIONAL DE MILHO E SORGO, 34., 2024, Palmas, TO. Sistemas de produção em fronteiras agrícolas: resumos. Sete Lagoas: Associação Brasileira de Milho e Sorgo, 2025. p. 168. p. 168.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
| |
| 12. | | SANTOS, T. R. dos; CUSTÓDIO, I. G.; BORGHI, E.; KARAM, D.; TRINDADE, R. dos S.; GUIMARAES, P. E. de O.; GUIMARAES, L. J. M. Variação genotípica na resposta de cultivares de milho ao dano mecânico. In: CONGRESSO NACIONAL DE MILHO E SORGO, 34., 2024, Palmas, TO. Sistemas de produção em fronteiras agrícolas: resumos. Sete Lagoas: Associação Brasileira de Milho e Sorgo, 2025. p. 168.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Milho e Sorgo. |
| |
| 13. | | NORDER, L. A. C.; TEIXEIRA, C. A.; COSTA, R. M. G. F.; SANTOS, T. R. dos; TRINDADE, E. R. R.; NOVASKI, G. S.; POYARES, G. A.; CADORIN JUNIOR, M. C.; ALENCAR, M. de C. F. Agroecologia em terras indígenas no Brasil: uma revisão bibliográfica. Espaço Ameríndio, v. 13, n. 2, p. 291-329, jul./dez. 2019.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Meio Ambiente. |
| |
| Registros recuperados : 13 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
