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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Trigo. |
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Data corrente: |
27/06/1995 |
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Data da última atualização: |
27/06/1995 |
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Autoria: |
BLEVINS, D. G.; BARNETT, N. M.; BOTTINO, P. J. |
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Título: |
The effects of calcium and the ionophore A23187 on nodulation, nitrogen fixation and growth of soybeans. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
Physiol. Plant., v.41, n.4, p.235-238, 1977. |
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Idioma: |
Inglês |
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Conteúdo: |
The calcium ionophore A23187 was used to separate the processes of infection and nodule development from nitrogen fixation in soybeans. Seedlings of Glycine max (L.) Merr. cv. Williams were grown in solution cultures containing three concentrations of Ca2+ (0.1, 0.5 or 1.0 mM) with or without 0.5 ?M ionophore A23187. Three weeks after inoculation with Rhizobium japonicum, strain B1. plants were harvested. Low Ca2+ (0.1 mM) significantly reduced nodule number and weight, acetylene reduction, fresh weight of roots and shoots and increased lengths of 2nd and 3rd internodes. There were no significant differences between 0.5 and 1.0 mM Ca2 in their influence on any parameters measured, except for Ca2+ concentration in the tissue. The ionophore A23187 significantly reduced nodule number and weight, and increased internode lengths, but it had no effect on acetylene reduction or fresh weight of roots and tops. The ionophore did not affect the Ca2+ concentration of roots, tops or nodules. Therefore, nitrogen fixation rate is partially independent of number and weight of nodules. The single most important result of this study is that the ionophore A23187 affected critical steps in the infection process or nodule development without influencing subsequent nitrogen fixation. |
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Palavras-Chave: |
Fisiologia da nodulação. |
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Thesagro: |
Cálcio; Rhizobium; Soja. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01831naa a2200193 a 4500
001 1599981
005 1995-06-27
008 1977 bl --- 0-- u #d
100 1 $aBLEVINS, D. G.
245 $aThe effects of calcium and the ionophore A23187 on nodulation, nitrogen fixation and growth of soybeans.
260 $c1977
520 $aThe calcium ionophore A23187 was used to separate the processes of infection and nodule development from nitrogen fixation in soybeans. Seedlings of Glycine max (L.) Merr. cv. Williams were grown in solution cultures containing three concentrations of Ca2+ (0.1, 0.5 or 1.0 mM) with or without 0.5 ?M ionophore A23187. Three weeks after inoculation with Rhizobium japonicum, strain B1. plants were harvested. Low Ca2+ (0.1 mM) significantly reduced nodule number and weight, acetylene reduction, fresh weight of roots and shoots and increased lengths of 2nd and 3rd internodes. There were no significant differences between 0.5 and 1.0 mM Ca2 in their influence on any parameters measured, except for Ca2+ concentration in the tissue. The ionophore A23187 significantly reduced nodule number and weight, and increased internode lengths, but it had no effect on acetylene reduction or fresh weight of roots and tops. The ionophore did not affect the Ca2+ concentration of roots, tops or nodules. Therefore, nitrogen fixation rate is partially independent of number and weight of nodules. The single most important result of this study is that the ionophore A23187 affected critical steps in the infection process or nodule development without influencing subsequent nitrogen fixation.
650 $aCálcio
650 $aRhizobium
650 $aSoja
653 $aFisiologia da nodulação
700 1 $aBARNETT, N. M.
700 1 $aBOTTINO, P. J.
773 $tPhysiol. Plant.$gv.41, n.4, p.235-238, 1977.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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| 1. |  | NÉO, T. A.; GIGLIOTI, R.; BRILHASSI, T. B.; GONÇALVES, T. C.; RABELO, M. D.; BRITO, L. G.; BARBIERI, F. da S.; OLIVEIRA, M. C. de S. Estudo da infecção de Babesia bovis em búfalos criados no estado de São Paulo. In: JORNADA CIENTÍFICA - EMBRAPA SÃO CARLOS, 5., 2013, São Carlos, SP. Anais... São Carlos, SP: Embrapa Pecuária Sudeste: Embrapa Instrumentação , 2013.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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