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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
28/09/2007 |
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Data da última atualização: |
26/07/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LOUREIRO, M. de F.; KASCHUK, G.; ALBERTON, O.; HUNGRIA, M. |
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Afiliação: |
MARIA DE FÁTIMA LOUREIRO, Faculdade de Agronomia e Medicina Veterinária/Universidade Federal do Mato Grosso; GLACIELA KASCHUK, Plant Production Systems Group; ODAIR ALBERTON, Department of Soil Quality; MARIANGELA HUNGRIA DA CUNHA, CNPSO. |
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Título: |
Soybean [Glycine max (L.) Merrill] rhizobial diversity in Brazilian oxisols under various soil, cropping, and inoculation managements. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Biology and Fertility of Soils, Berlin, v. 43, n. 6. p. 665-674, Aug. 2007. |
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ISSN: |
0178-2762 |
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DOI: |
10.1007/s00374-006-0146-x |
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Idioma: |
Inglês |
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Conteúdo: |
In this study, soybean nodules were collected from 12 sites in the State of Mato Grosso, in the Brazilian Cerrados, where both exotic soybean [Glycine max (L.) Merrill] and bradyrhizobial strains have been introduced from 1 to 18 years before. All soils were originally devoid of rhizobia capable of effectively nodulating soybean and varied in terms of chemical and physical properties, inoculation procedures, and cropping systems. Rhizobial genetic diversity was assessed on 240 isolates by rep-PCR fingerprinting with BOX primer, and indices of diversity (abundance-based coverage estimator and traditional and modified Shannon indices) were applied to the profiles obtained. The genetic diversity was much greater than expected, as after the introduction of a maximum of four strains, up to 13 profiles were identified, some sharing many similar bands with the inoculant strains, but others quite distinct from the putative parental genotypes. The increase in the number of rep-PCR profiles could be attributed to genetic variability due to the stressful tropical environmental conditions, but also might indicate that indigenous rhizobia become capable of nodulating the host legume. After the third year of cropping with the host legume, inoculation did not affect rhizobial diversity. A high content of clay decreased diversity in comparison with that seen in a sandy soil, probably due to reduced aeration. Diversity was higher under the no-tillage system when compared to the conventional tillage management, highlighting the importance of maintaining crop residues in tropical soils. Understanding the ecology of exotic rhizobia after being introduced into new cropping areas represents a first step towards the establishment of better strategies of inoculation, which in turn may result in sustainability and higher plant yields. MenosIn this study, soybean nodules were collected from 12 sites in the State of Mato Grosso, in the Brazilian Cerrados, where both exotic soybean [Glycine max (L.) Merrill] and bradyrhizobial strains have been introduced from 1 to 18 years before. All soils were originally devoid of rhizobia capable of effectively nodulating soybean and varied in terms of chemical and physical properties, inoculation procedures, and cropping systems. Rhizobial genetic diversity was assessed on 240 isolates by rep-PCR fingerprinting with BOX primer, and indices of diversity (abundance-based coverage estimator and traditional and modified Shannon indices) were applied to the profiles obtained. The genetic diversity was much greater than expected, as after the introduction of a maximum of four strains, up to 13 profiles were identified, some sharing many similar bands with the inoculant strains, but others quite distinct from the putative parental genotypes. The increase in the number of rep-PCR profiles could be attributed to genetic variability due to the stressful tropical environmental conditions, but also might indicate that indigenous rhizobia become capable of nodulating the host legume. After the third year of cropping with the host legume, inoculation did not affect rhizobial diversity. A high content of clay decreased diversity in comparison with that seen in a sandy soil, probably due to reduced aeration. Diversity was higher under the no-tillage system when compared to the conventional ... Mostrar Tudo |
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Thesagro: |
Soja. |
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Categoria do assunto: |
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Marc: |
LEADER 02458naa a2200193 a 4500
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008 2007 bl uuuu u00u1 u #d
022 $a0178-2762
024 7 $a10.1007/s00374-006-0146-x$2DOI
100 1 $aLOUREIRO, M. de F.
245 $aSoybean [Glycine max (L.) Merrill] rhizobial diversity in Brazilian oxisols under various soil, cropping, and inoculation managements.
260 $c2007
520 $aIn this study, soybean nodules were collected from 12 sites in the State of Mato Grosso, in the Brazilian Cerrados, where both exotic soybean [Glycine max (L.) Merrill] and bradyrhizobial strains have been introduced from 1 to 18 years before. All soils were originally devoid of rhizobia capable of effectively nodulating soybean and varied in terms of chemical and physical properties, inoculation procedures, and cropping systems. Rhizobial genetic diversity was assessed on 240 isolates by rep-PCR fingerprinting with BOX primer, and indices of diversity (abundance-based coverage estimator and traditional and modified Shannon indices) were applied to the profiles obtained. The genetic diversity was much greater than expected, as after the introduction of a maximum of four strains, up to 13 profiles were identified, some sharing many similar bands with the inoculant strains, but others quite distinct from the putative parental genotypes. The increase in the number of rep-PCR profiles could be attributed to genetic variability due to the stressful tropical environmental conditions, but also might indicate that indigenous rhizobia become capable of nodulating the host legume. After the third year of cropping with the host legume, inoculation did not affect rhizobial diversity. A high content of clay decreased diversity in comparison with that seen in a sandy soil, probably due to reduced aeration. Diversity was higher under the no-tillage system when compared to the conventional tillage management, highlighting the importance of maintaining crop residues in tropical soils. Understanding the ecology of exotic rhizobia after being introduced into new cropping areas represents a first step towards the establishment of better strategies of inoculation, which in turn may result in sustainability and higher plant yields.
650 $aSoja
700 1 $aKASCHUK, G.
700 1 $aALBERTON, O.
700 1 $aHUNGRIA, M.
773 $tBiology and Fertility of Soils, Berlin$gv. 43, n. 6. p. 665-674, Aug. 2007.
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Registro original: |
Embrapa Soja (CNPSO) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Recursos Genéticos e Biotecnologia. Para informações adicionais entre em contato com cenargen.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
21/04/2010 |
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Data da última atualização: |
06/05/2024 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SILVA JUNIOR, O. B. da; TOGAWA, R. C.; NOVAES, E.; FARIA, D. A. de; PAPPAS JUNIOR, G. J.; MATIAS, K.; GRATTAPAGLIA, D. |
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Afiliação: |
ORZENIL BONFIM DA SILVA JUNIOR, CENARGEN; ROBERTO COITI TOGAWA, CENARGEN; UNIVERSITY OF FLORIDA; DANIELLE DE A. FARIA; GEORGIOS JOANNIS PAPPAS JUNIOR, CENARGEN; KIRST MATIAS, UNIVERSITY OF FLORIDA; DARIO GRATTAPAGLIA, CENARGEN. |
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Título: |
Assessment of predicted assay functionality of Eucalyptus SNP derived from large interspecific collections of ESTs. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
In: IUFRO TREE BIOTECHNOLOGY CONFERENCE, 2009, Whislter. Abstracts. [S.l.]: IUFRO, 2009. p-52 |
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Idioma: |
Inglês |
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Palavras-Chave: |
Melhoramento genético. |
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Thesaurus NAL: |
Eucalyptus. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00684nam a2200193 a 4500
001 1697182
005 2024-05-06
008 2009 bl uuuu u00u1 u #d
100 1 $aSILVA JUNIOR, O. B. da
245 $aAssessment of predicted assay functionality of Eucalyptus SNP derived from large interspecific collections of ESTs.$h[electronic resource]
260 $aIn: IUFRO TREE BIOTECHNOLOGY CONFERENCE, 2009, Whislter. Abstracts. [S.l.]: IUFRO, 2009. p-52$c2009
650 $aEucalyptus
653 $aMelhoramento genético
700 1 $aTOGAWA, R. C.
700 1 $aNOVAES, E.
700 1 $aFARIA, D. A. de
700 1 $aPAPPAS JUNIOR, G. J.
700 1 $aMATIAS, K.
700 1 $aGRATTAPAGLIA, D.
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