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| Registros recuperados : 337 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Unidades Centrais. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
27/06/1995 |
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Data da última atualização: |
18/02/2002 |
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Autoria: |
VARGAS, M. A. T. |
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Título: |
Competitiveness and Rhizosphere Colonization of Bradyrhizobium sp Strains of Chickpea. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, V. 25, n.4, p. 599-607, abr.1990 |
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Idioma: |
Inglês
Português |
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Conteúdo: |
Factors affecting competition among strains of Bradyrhizobium sp for nodulation of chickpea (Cicer arietinum L.) were investigated in the greenhouse. Nodule occupancy by two strains varied when the strains were co-inoculated either in Leonard jars on in soil pots, or when inoculum ratios of the strains were changed. In another experiment, early rizosphere dominance in root tips or total rizosphere did not reflect nodule occupancy, as all the nodules were formed by the soil-born strain, which represented less than 1%& of the early rizosphere population. In a time-course inoculation experiment with 2-day-old chickpea seedlings, a delay in adding the secondary inoculum by 4 h increased the nodule occupancy of the primary strain from 16 to 94%. The results indicate that actual rates of strains are impoortant only when the strains are inoculated together under the same conditions, but when different inoculation methods were used, rhizosphere numbers did not define nodule occupancy by the strains. |
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Palavras-Chave: |
COMPETITIVIDADE; inoculation; Leonard jars; nodules; soil pots. |
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Thesagro: |
Cicer Arietinum. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01570naa a2200193 a 4500
001 1106346
005 2002-02-18
008 1990 bl uuuu u00u1 u #d
100 1 $aVARGAS, M. A. T.
245 $aCompetitiveness and Rhizosphere Colonization of Bradyrhizobium sp Strains of Chickpea.
260 $c1990
520 $aFactors affecting competition among strains of Bradyrhizobium sp for nodulation of chickpea (Cicer arietinum L.) were investigated in the greenhouse. Nodule occupancy by two strains varied when the strains were co-inoculated either in Leonard jars on in soil pots, or when inoculum ratios of the strains were changed. In another experiment, early rizosphere dominance in root tips or total rizosphere did not reflect nodule occupancy, as all the nodules were formed by the soil-born strain, which represented less than 1%& of the early rizosphere population. In a time-course inoculation experiment with 2-day-old chickpea seedlings, a delay in adding the secondary inoculum by 4 h increased the nodule occupancy of the primary strain from 16 to 94%. The results indicate that actual rates of strains are impoortant only when the strains are inoculated together under the same conditions, but when different inoculation methods were used, rhizosphere numbers did not define nodule occupancy by the strains.
650 $aCicer Arietinum
653 $aCOMPETITIVIDADE
653 $ainoculation
653 $aLeonard jars
653 $anodules
653 $asoil pots
773 $tPesquisa Agropecuária Brasileira, Brasília, V. 25$gn.4, p. 599-607, abr.1990
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