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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
11/09/1995 |
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Data da última atualização: |
11/09/1995 |
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Autoria: |
ALLEN, S.; SMITH, J. A. C. |
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Afiliação: |
Departament of Biological Sciences, University of Dundee, Dundee DDI 4HN, U.K. |
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Título: |
Ammonium Nutrition in Ricinus Communis: Its Effect on Plant Growth andthe Chemical Composition of the Whole Plant, Xylem and Phloem Saps |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
Jornal of Experimental Botany, v.37, n.184, p.1599-1610, November 1986 |
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Idioma: |
Inglês |
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Conteúdo: |
The growth and chemical composition of Ricinus communis cultivated hydroponically on 12 mol m -3 NO-3 N were compared with plants raised ona range of NH+4 N concentrations between 0.5 and 0.4 mol m-3, fresh and dry-weight yelds of 62-d-old plants were not significantly differentfrom those of the NO-3 -N and was associated with increased root: shoot and C: organic N ratios, suggesting that the plants were N-limited. At 8.0 mol m-3 NH+4 -N, growth was greatly restricted and the plants exhibited symptoms of severe NH+4 toxicity. Plants growing on NH+4 -N showed marked acidification of the rooting medium, this effect being greatest on media supporting the highest growth rates. Shoot carboxylatecontent per unit dry weight was lower at most NH+4 -N concentrations than in the NO-3 -N controls, although it increased at the lowest NH+4-N levels. Root carboxilat content was comparable on the two N sourcesbut also increased substantially at the lowest NH+4 -N levels. N source had tittle effec on inorganic-cation content at the whole-plant level, while NO-3 and carboxylat were replaced by CI- as the dominant anion in the NH+4 -N plants. |
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Palavras-Chave: |
Aminoacids; Ammonium nutrition; carboxylate; Nitate; Recinus; Whole-plant composition. |
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Thesaurus Nal: |
phloem; xylem. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01825naa a2200229 a 4500
001 1647031
005 1995-09-11
008 1986 bl --- 0-- u #d
100 1 $aALLEN, S.
245 $aAmmonium Nutrition in Ricinus Communis$bIts Effect on Plant Growth andthe Chemical Composition of the Whole Plant, Xylem and Phloem Saps
260 $c1986
520 $aThe growth and chemical composition of Ricinus communis cultivated hydroponically on 12 mol m -3 NO-3 N were compared with plants raised ona range of NH+4 N concentrations between 0.5 and 0.4 mol m-3, fresh and dry-weight yelds of 62-d-old plants were not significantly differentfrom those of the NO-3 -N and was associated with increased root: shoot and C: organic N ratios, suggesting that the plants were N-limited. At 8.0 mol m-3 NH+4 -N, growth was greatly restricted and the plants exhibited symptoms of severe NH+4 toxicity. Plants growing on NH+4 -N showed marked acidification of the rooting medium, this effect being greatest on media supporting the highest growth rates. Shoot carboxylatecontent per unit dry weight was lower at most NH+4 -N concentrations than in the NO-3 -N controls, although it increased at the lowest NH+4-N levels. Root carboxilat content was comparable on the two N sourcesbut also increased substantially at the lowest NH+4 -N levels. N source had tittle effec on inorganic-cation content at the whole-plant level, while NO-3 and carboxylat were replaced by CI- as the dominant anion in the NH+4 -N plants.
650 $aphloem
650 $axylem
653 $aAminoacids
653 $aAmmonium nutrition
653 $acarboxylate
653 $aNitate
653 $aRecinus
653 $aWhole-plant composition
700 1 $aSMITH, J. A. C.
773 $tJornal of Experimental Botany$gv.37, n.184, p.1599-1610, November 1986
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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| Registros recuperados : 6 | |
| 2. |  | MANETA, M.; TORRES, M.; VOSTI, S. A.; WALLENDER, W. W.; ALLEN, S.; BASSOI, L. H.; BENNETT, L.; HOWITT, R.; RODRIGUES, L.; YOUNG, J. Assessing agriculture-water links at basin scale: a hydro-economic model of the São Francisco River basin, Brazil. In: WORLD WATER CONGRESS, 13., 2008, Montpellier. Global changes and water resources: confronting the expanding and diversifying pressures. Halfway House: IWRA, 2008. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Cerrados. |
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| 3. | | MANETA, M.; TORRES, M.; VOSTI, S. A.; WALLENDER, W. W.; ALLEN, S.; BASSOI, L. H.; BENNETT, L.; HOWITT, R.; RODRIGUES, L.; YOUNG, J. Assessing agriculture-water links at basin scale: a hydro-economic model of the São Francisco River basin, Brazil. In: WORLD WATER CONGRESS, 13., 2008, Montpellier. Global changes and water resources: confronting the expanding and diversifying pressures. Halfway House: IWRA, 2008. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Semiárido. |
|  |
| 4. | | MANETA, M.; TORRES, M.; VOSTI, S. A.; WALLENDER, W. W.; ALLEN, S.; BASSOI, L. H.; BENNETT, L.; HOWITT, R.; RODRIGUES, L. N.; YOUNG, J. Assessing agriculture-water links at the basin scale: hydrologic and economic models of the São Francisco River Basin, Brazil. Water International, London, v. 34, n. 1, p. 88-103, 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Semiárido. |
|  |
| 5. | | MANETA, M.; TORRES, M.; VOSTI, S. A.; WALLENDER, W. W.; ALLEN, S.; BASSOI, L. H.; BENNETT, L.; HOWITT, R.; RODRIGUES, L.; YOUNG, J. Assessing agriculture-water links at the basin scale: hydrologic and economic models of the São Francisco River Basin, Brazil. Water International, v. 34, n. 1, p. 88-103, 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Cerrados. |
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| 6. | | MANETA, M.; TORRES, M.; WALLENDER, W.; HOWITT, R.; VOSTI, S.; RODRIGUES, L. N.; BASSOI, L. H.; ALLEN, S.; BENNETT, L.; YOUNG, J. Water management across scales in the São Francisco river basin, Brazil: policy options and poverty consequences. In: CGIAR CHALLENGE PROGRAM ON WATER AND FOOD INTERNATIONAL FORUM ON WATER AND FOOD, 2., 2008, Addis Ababa, Ethiopia. Proceedings... [S.l.:s.n.], 2008. v. 1, p. 150-154.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 6 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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