Host plant specificity of a native variety of Stylosanthes gracilis
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/17404 |
Resumo: | In three greenhouse experiments nodulation difficulties of the variety IRI-1022 of Stylosanthes gracilis (H.B.K.) were studied. This variety is one of the most promising in the winter-dry regions of Central Brazil. In the first experiment six Rhizobium strains were compared on three varieties of S. gracilis. The varieties FAO 13381 and Deodoro II showed effective symbiosis with two local strains and with the Australian CB-756, but variety IRI-1022 showed poor N-fixation with the two local strains and did not form one nodule with strain CB-756. In a second experiment 24 strains of the "cowpea" group isolated from 8 different species were tested on the variety IRI-1022. Only the three homologous strains and one strain from Centrosema pubescens and one from Calopogonium mucunoides were able to produce nodules on this variety but none was highly effective. In the third experiment six homologous local strains were compared with soil inoculant obtained in five soil series. Two soils did not produce nodules but the three other soils produced more effective symbiosis than the pure strains. Nodule efficiency was evaluated by the regression of total plant nitrogen on nodule weight. In S. gracilis it varied with variety and with the inoculant. With pure strains nodule efficiency was four times higher with the variety Deodoro II than with the variety IRI-1022. Nodule efficiency in variety IRI-1022 was three times greater with soil inoculants. |
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Host plant specificity of a native variety of Stylosanthes gracilisEspecificidade de uma variedade nativa de "Alfafa do Nordeste” (Stylosanthes gracilis) na simbiose com Rhizobium sp.In three greenhouse experiments nodulation difficulties of the variety IRI-1022 of Stylosanthes gracilis (H.B.K.) were studied. This variety is one of the most promising in the winter-dry regions of Central Brazil. In the first experiment six Rhizobium strains were compared on three varieties of S. gracilis. The varieties FAO 13381 and Deodoro II showed effective symbiosis with two local strains and with the Australian CB-756, but variety IRI-1022 showed poor N-fixation with the two local strains and did not form one nodule with strain CB-756. In a second experiment 24 strains of the "cowpea" group isolated from 8 different species were tested on the variety IRI-1022. Only the three homologous strains and one strain from Centrosema pubescens and one from Calopogonium mucunoides were able to produce nodules on this variety but none was highly effective. In the third experiment six homologous local strains were compared with soil inoculant obtained in five soil series. Two soils did not produce nodules but the three other soils produced more effective symbiosis than the pure strains. Nodule efficiency was evaluated by the regression of total plant nitrogen on nodule weight. In S. gracilis it varied with variety and with the inoculant. With pure strains nodule efficiency was four times higher with the variety Deodoro II than with the variety IRI-1022. Nodule efficiency in variety IRI-1022 was three times greater with soil inoculants.Foram feitos três experimentos de casa de vegetação com a finalidade de esclarecer dificuldades surgidas na inoculação da variedade de Alfafa do Nordeste (Stylosanthes gracilis H.B.K.) mais recomendada para as regiões do Brasil Central, a variedade IRI 1022. No primeiro experimento, foram comparadas três variedades inoculadas com seis estirpes de Rhizobium. Enquanto as variedades FAO 13381 e Deodoro II apresentaram simbiose eficaz com duas das estirpes locais e principalmente com a estirpe CB-756, estirpe esta recomendada na Austrália para inoculação de Stylosanthes gracilis, a variedade IRI 1022 apresentou simbiose menos eficaz com as estirpes locais o não produziu um só nódulo com a estirpe CB-756. No segundo experimento, foram testadas 24 estirpes de Rhizobium do grupo "Cowpea", provenientes de oito espécies forrageiras, na variedade IRI 1022. Apenas as três estirpes homólogas e uma de cada de Centrosema pubescens e Calopogonium muconoides produziram nódulos nesta variedade, não sendo nenhuma estirpe altamente eficaz. No terceiro experimento, foram comparadas seis estirpes homólogas locais com inoculantes de solo proveniente de cinco séries de solos. Enquanto dois solos não produziram nódulos, o Rhizobium proveniente dos três outros foi mais eficaz que as estirpes puras. A eficiência nodular avaliada pela regressão do N total nas plantas sôbre o peso dos nódulos variou com as variedades de Stylosanthes e com os inoculantes. Com as estirpes puras, foi quatro vêzes maior nas variedades FAO 13381 e Deodoro II do que na variedade IRI 1022. Na variedade IRI 1022, a eficiência nodular foi triplicada pelos inoculantes de solo.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraSouto, Sebastião ManhãesCóser, Antonio CarlosDöbereiner, Johanna2014-04-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/17404Pesquisa Agropecuaria Brasileira; v.7, n.1, 1972: Série Zootecnia; 1-5Pesquisa Agropecuária Brasileira; v.7, n.1, 1972: Série Zootecnia; 1-51678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/17404/11668info:eu-repo/semantics/openAccess2014-04-15T18:39:20Zoai:ojs.seer.sct.embrapa.br:article/17404Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-15T18:39:20Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Host plant specificity of a native variety of Stylosanthes gracilis Especificidade de uma variedade nativa de "Alfafa do Nordeste” (Stylosanthes gracilis) na simbiose com Rhizobium sp. |
title |
Host plant specificity of a native variety of Stylosanthes gracilis |
spellingShingle |
Host plant specificity of a native variety of Stylosanthes gracilis Souto, Sebastião Manhães |
title_short |
Host plant specificity of a native variety of Stylosanthes gracilis |
title_full |
Host plant specificity of a native variety of Stylosanthes gracilis |
title_fullStr |
Host plant specificity of a native variety of Stylosanthes gracilis |
title_full_unstemmed |
Host plant specificity of a native variety of Stylosanthes gracilis |
title_sort |
Host plant specificity of a native variety of Stylosanthes gracilis |
author |
Souto, Sebastião Manhães |
author_facet |
Souto, Sebastião Manhães Cóser, Antonio Carlos Döbereiner, Johanna |
author_role |
author |
author2 |
Cóser, Antonio Carlos Döbereiner, Johanna |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Souto, Sebastião Manhães Cóser, Antonio Carlos Döbereiner, Johanna |
dc.subject.none.fl_str_mv |
|
description |
In three greenhouse experiments nodulation difficulties of the variety IRI-1022 of Stylosanthes gracilis (H.B.K.) were studied. This variety is one of the most promising in the winter-dry regions of Central Brazil. In the first experiment six Rhizobium strains were compared on three varieties of S. gracilis. The varieties FAO 13381 and Deodoro II showed effective symbiosis with two local strains and with the Australian CB-756, but variety IRI-1022 showed poor N-fixation with the two local strains and did not form one nodule with strain CB-756. In a second experiment 24 strains of the "cowpea" group isolated from 8 different species were tested on the variety IRI-1022. Only the three homologous strains and one strain from Centrosema pubescens and one from Calopogonium mucunoides were able to produce nodules on this variety but none was highly effective. In the third experiment six homologous local strains were compared with soil inoculant obtained in five soil series. Two soils did not produce nodules but the three other soils produced more effective symbiosis than the pure strains. Nodule efficiency was evaluated by the regression of total plant nitrogen on nodule weight. In S. gracilis it varied with variety and with the inoculant. With pure strains nodule efficiency was four times higher with the variety Deodoro II than with the variety IRI-1022. Nodule efficiency in variety IRI-1022 was three times greater with soil inoculants. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-15 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/17404 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/17404 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/17404/11668 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.7, n.1, 1972: Série Zootecnia; 1-5 Pesquisa Agropecuária Brasileira; v.7, n.1, 1972: Série Zootecnia; 1-5 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416715623727104 |