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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
14/05/2001 |
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Data da última atualização: |
21/11/2018 |
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Autoria: |
MACHADO, A. T.; SODEK, L.; FERNANDES, M. S. |
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Afiliação: |
ALTAIR TOLEDO MACHADO, CPAC; Ladaslav Sodek, Universidade Estadual de Campinas - Unicamp/Departamento de Fisiologia Vegetal; Mânlio Silvestre Fernandes, Universidade Federal Rural do Rio de Janeiro - UFRRJ/Departamento de Solos. |
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Título: |
N-partitioning, nitrate reductase and glutamine synthetase activities in two contrasting varieties of maize. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 36, n. 2, p. 249-256, fev. 2001 |
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Idioma: |
Inglês |
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Notas: |
Título em português: Partição de nitrogênio e atividade das enzimas nitrato redutase e glutamina sintetase em duas cultivares contrastantes de milho. |
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Conteúdo: |
In order to identify useful parameters for maize genetic breeding programs aiming at a more efficient use of N, two maize varieties of contrasting N efficiency, Sol da Manhã NF (efficient) and Catetão (inefficient) were compared. Experiments were carried out under field and greenhouse conditions, at low and high N levels. The parameters analysed included total and relative plant and grain N content, biomass and the activities of nitrate reductase and glutamine synthetase in different parts of the plant. It was found that the translocation efficiency of N and photoassimilates to the developing seeds and the source-sink relations were significantly different for the two varieties. N content of the whole plant and grain, cob weight and the relative ear dry weight were useful parameters for characterizing the variety Sol da Manhã NF as to its efficient use of N. Enzymes activity of glutamine synthetase (transferase reaction) and nitrate reductase did not differ among the varieties. |
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Palavras-Chave: |
Melhoramento de planta; Relação fonte-dreno. |
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Thesagro: |
Grão; Melhoramento Genético Vegetal; Milho; Nitrogênio; Transporte de Nutriente. |
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Thesaurus NAL: |
Corn; Nitrogen; Nutrient transport; Plant breeding. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/18933/1/pab99_230.pdf
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Marc: |
LEADER 01990naa a2200289 a 4500
001 1103665
005 2018-11-21
008 2001 bl uuuu u00u1 u #d
100 1 $aMACHADO, A. T.
245 $aN-partitioning, nitrate reductase and glutamine synthetase activities in two contrasting varieties of maize.
260 $c2001
500 $aTítulo em português: Partição de nitrogênio e atividade das enzimas nitrato redutase e glutamina sintetase em duas cultivares contrastantes de milho.
520 $aIn order to identify useful parameters for maize genetic breeding programs aiming at a more efficient use of N, two maize varieties of contrasting N efficiency, Sol da Manhã NF (efficient) and Catetão (inefficient) were compared. Experiments were carried out under field and greenhouse conditions, at low and high N levels. The parameters analysed included total and relative plant and grain N content, biomass and the activities of nitrate reductase and glutamine synthetase in different parts of the plant. It was found that the translocation efficiency of N and photoassimilates to the developing seeds and the source-sink relations were significantly different for the two varieties. N content of the whole plant and grain, cob weight and the relative ear dry weight were useful parameters for characterizing the variety Sol da Manhã NF as to its efficient use of N. Enzymes activity of glutamine synthetase (transferase reaction) and nitrate reductase did not differ among the varieties.
650 $aCorn
650 $aNitrogen
650 $aNutrient transport
650 $aPlant breeding
650 $aGrão
650 $aMelhoramento Genético Vegetal
650 $aMilho
650 $aNitrogênio
650 $aTransporte de Nutriente
653 $aMelhoramento de planta
653 $aRelação fonte-dreno
700 1 $aSODEK, L.
700 1 $aFERNANDES, M. S.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 36, n. 2, p. 249-256, fev. 2001
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