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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Solos. |
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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: |
FRANCO, A. A.; MUNNS, D. N. |
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Título: |
Acidity and aluminum restraints on nodulation, nitrogen fixation, and growth of Phaseolus vulgaris in solution culture. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Soil Science Society of America Journal, Madison, v. 46, p. 296-301, 1982. |
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Idioma: |
Inglês |
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Conteúdo: |
The effects of acidity and aluminum (Al) on nodulation, nitrogen (N) fixation, and bean shoot and root growth were studied in solution and sand culture in greenhouse experiments to help explain the frequent failure of N2-dependent bean in acid soils. Aluminum concentrations were maintained in solution by keeping low levels of phosphorus (P) at pH 4.5. Concentrations of Al up to 83 µM did not affect root dry weight, nodule growth, and nitrogenase activity of either bean cultivar tested. Low levels of Al (19 µM) increased taproot elongation but decreased total root length; at higher Al concentrations, the taproot also became stunted. Increasing CaCl2 from 0.2 to 2 mM in solution suppressed Al toxicity. Shoot growth was significantly decreased by 19 µM Al in P. vulgaris cv. Carioca but not in cv. Venezuela 350. Root colonization and/or infection by Rhizobium was reduced by Al concentrations >33 µM but was less sensitive than total root elongation or shoot growth. Solution culture pH in the range 4.5 to 5.5 did not affect nodule growth and nitrogenase activity, but a decrease in pH from 5.5 to 5.0 decreased number of nodules formed per plant from 60 to 10, indicating that pH can be a major limiting factor of early nodulation with the cultivars and Rhizobium strains tested. |
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Palavras-Chave: |
Aluminium; FBN; Feijo; Fixação biológica de nitrogênio; Growth; NBF; Nitrogen fixing bacteria. |
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Thesagro: |
Acidez do Solo; Alumínio; Crescimento; Nodulação; Phaseolus Vulgaris; Rhizobium. |
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Thesaurus Nal: |
Aluminum; Beans; Nitrogen-fixing bacteria; Soil pH. |
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Categoria do assunto: |
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P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02254naa a2200337 a 4500
001 1607366
005 1995-06-27
008 1982 bl uuuu u00u1 u #d
100 1 $aFRANCO, A. A.
245 $aAcidity and aluminum restraints on nodulation, nitrogen fixation, and growth of Phaseolus vulgaris in solution culture.$h[electronic resource]
260 $c1982
520 $aThe effects of acidity and aluminum (Al) on nodulation, nitrogen (N) fixation, and bean shoot and root growth were studied in solution and sand culture in greenhouse experiments to help explain the frequent failure of N2-dependent bean in acid soils. Aluminum concentrations were maintained in solution by keeping low levels of phosphorus (P) at pH 4.5. Concentrations of Al up to 83 µM did not affect root dry weight, nodule growth, and nitrogenase activity of either bean cultivar tested. Low levels of Al (19 µM) increased taproot elongation but decreased total root length; at higher Al concentrations, the taproot also became stunted. Increasing CaCl2 from 0.2 to 2 mM in solution suppressed Al toxicity. Shoot growth was significantly decreased by 19 µM Al in P. vulgaris cv. Carioca but not in cv. Venezuela 350. Root colonization and/or infection by Rhizobium was reduced by Al concentrations >33 µM but was less sensitive than total root elongation or shoot growth. Solution culture pH in the range 4.5 to 5.5 did not affect nodule growth and nitrogenase activity, but a decrease in pH from 5.5 to 5.0 decreased number of nodules formed per plant from 60 to 10, indicating that pH can be a major limiting factor of early nodulation with the cultivars and Rhizobium strains tested.
650 $aAluminum
650 $aBeans
650 $aNitrogen-fixing bacteria
650 $aSoil pH
650 $aAcidez do Solo
650 $aAlumínio
650 $aCrescimento
650 $aNodulação
650 $aPhaseolus Vulgaris
650 $aRhizobium
653 $aAluminium
653 $aFBN
653 $aFeijo
653 $aFixação biológica de nitrogênio
653 $aGrowth
653 $aNBF
653 $aNitrogen fixing bacteria
700 1 $aMUNNS, D. N.
773 $tSoil Science Society of America Journal, Madison$gv. 46, p. 296-301, 1982.
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Embrapa Agrobiologia (CNPAB) |
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