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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Milho e Sorgo. |
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Data corrente: |
27/06/1995 |
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Data da última atualização: |
27/06/1995 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MAGALHAES, J. R.; HUBER, D. M. |
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Título: |
Response of ammonium assimilation enzymes to nitrogen form treatments in different plant species. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
J. Plant Nutr., v. 14, n. 2, p. 175-185, 1991. |
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Idioma: |
Inglês |
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Conteúdo: |
This series of experiments studied N metabolism in tomato, rice and corn. Ammonium (NH4+), as a sole source of N, reduced tomato and corn growth, but not rice growth. Tomato showed the most severe NH4+ toxicity. Ammonium assimilation enzyme activity differed greatly among the species. Rice had much higher glutamine synthetase (GS) activity than corn and tomato with NH4+ nutrition. GS activity was especially high in shoot tissue. Ammonium induced high activity of glutamate dehydrogenase (GDH) in roots of tomato but not in rice. GS activity in rice increased as the level of NH4+ increased; and it was higher in shoots than roots, indicating GS activity as a key factor in the detoxification and metabolism of NH4+ in green tissues of efficient plant species. |
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Palavras-Chave: |
Ammonium; Enzyme; Maize; Tomato. |
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Thesagro: |
Amônia; Arroz; Enzima; Metabolismo; Milho; Nitrogênio; Tomate. |
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Thesaurus Nal: |
metabolism; nitrogen; rice. |
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Categoria do assunto: |
--
W Química e Física |
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Marc: |
LEADER 01521naa a2200301 a 4500
001 1620029
005 1995-06-27
008 1991 bl uuuu u00u1 u #d
100 1 $aMAGALHAES, J. R.
245 $aResponse of ammonium assimilation enzymes to nitrogen form treatments in different plant species.$h[electronic resource]
260 $c1991
520 $aThis series of experiments studied N metabolism in tomato, rice and corn. Ammonium (NH4+), as a sole source of N, reduced tomato and corn growth, but not rice growth. Tomato showed the most severe NH4+ toxicity. Ammonium assimilation enzyme activity differed greatly among the species. Rice had much higher glutamine synthetase (GS) activity than corn and tomato with NH4+ nutrition. GS activity was especially high in shoot tissue. Ammonium induced high activity of glutamate dehydrogenase (GDH) in roots of tomato but not in rice. GS activity in rice increased as the level of NH4+ increased; and it was higher in shoots than roots, indicating GS activity as a key factor in the detoxification and metabolism of NH4+ in green tissues of efficient plant species.
650 $ametabolism
650 $anitrogen
650 $arice
650 $aAmônia
650 $aArroz
650 $aEnzima
650 $aMetabolismo
650 $aMilho
650 $aNitrogênio
650 $aTomate
653 $aAmmonium
653 $aEnzyme
653 $aMaize
653 $aTomato
700 1 $aHUBER, D. M.
773 $tJ. Plant Nutr.$gv. 14, n. 2, p. 175-185, 1991.
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Embrapa Agrobiologia (CNPAB) |
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