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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
28/04/1993 |
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Data da última atualização: |
28/04/1993 |
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Autoria: |
MINAMISAWA, K.; FUKAI, K. |
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Afiliação: |
Faculty of Agriculture, Ibaraki University, Ami, Ibarakim 300-03 Japan. |
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Título: |
Production of indole-3-acetic acid by Bradyrhizobium japonicum: a correlation with genotype grouping and rhizobitoxine production. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Plant and Cell Physiology, v.32, n.1, p.1-9, 1991. |
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Idioma: |
Inglês |
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Conteúdo: |
Bioassays show that rhizobitoxine-producing strains of Bradyrhizobium japonicum excreted another phytotoxic compound into their culture fluid. This compound was purified and identified by HPLC and mass spectrometry as indole-3-acetic acid (IAA). The levels of IAA produced by the different strains of B. japonicum, for which the genotype groups have been determined with respect to the degree of base substitution in and around nifDKE, were quantified using gas chromatography/mass spectometry and a deuterated internal standard. Genotype II strains, which produce rhizobitoxine, excreted more than 20um of IAA into their culture fluid. However, no IAA was detected in the culture supernatants of genotype I strains, which do not produce rhizobitoxine. This was true even when tryptophan was added to the medium. Moreover, cells of genotypes I and II strains, which were grown under our culture conditions, did not show IAA degradation activity. These results suggest that, in wild-type B. japonicum strains, complete IAA biosynthesis is confined exclusively to genotype II strains that produce rhizobitoxine. |
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Palavras-Chave: |
Acido indol acetico; Genetic; Rhizobitoxine; Rizobiotoxina; Soybean. |
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Thesagro: |
Bactéria; Bradyrhizobium Japonicum; Filogenia; Genética; Glycine Max; Soja; Taxonomia. |
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Thesaurus Nal: |
indole acetic acid; phylogeny; taxonomy. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01964naa a2200313 a 4500
001 1457967
005 1993-04-28
008 1991 bl --- 0-- u #d
100 1 $aMINAMISAWA, K.
245 $aProduction of indole-3-acetic acid by Bradyrhizobium japonicum$ba correlation with genotype grouping and rhizobitoxine production.
260 $c1991
520 $aBioassays show that rhizobitoxine-producing strains of Bradyrhizobium japonicum excreted another phytotoxic compound into their culture fluid. This compound was purified and identified by HPLC and mass spectrometry as indole-3-acetic acid (IAA). The levels of IAA produced by the different strains of B. japonicum, for which the genotype groups have been determined with respect to the degree of base substitution in and around nifDKE, were quantified using gas chromatography/mass spectometry and a deuterated internal standard. Genotype II strains, which produce rhizobitoxine, excreted more than 20um of IAA into their culture fluid. However, no IAA was detected in the culture supernatants of genotype I strains, which do not produce rhizobitoxine. This was true even when tryptophan was added to the medium. Moreover, cells of genotypes I and II strains, which were grown under our culture conditions, did not show IAA degradation activity. These results suggest that, in wild-type B. japonicum strains, complete IAA biosynthesis is confined exclusively to genotype II strains that produce rhizobitoxine.
650 $aindole acetic acid
650 $aphylogeny
650 $ataxonomy
650 $aBactéria
650 $aBradyrhizobium Japonicum
650 $aFilogenia
650 $aGenética
650 $aGlycine Max
650 $aSoja
650 $aTaxonomia
653 $aAcido indol acetico
653 $aGenetic
653 $aRhizobitoxine
653 $aRizobiotoxina
653 $aSoybean
700 1 $aFUKAI, K.
773 $tPlant and Cell Physiology$gv.32, n.1, p.1-9, 1991.
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Registro original: |
Embrapa Soja (CNPSO) |
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