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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
20/06/2011 |
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Data da última atualização: |
12/12/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FILIPPI, M. C. C.; SILVA, G. B. da; SILVA-LOBO, V. L.; CORTES, M. V. C. B.; MORAES, A. J. G.; PRABHU, A. S. |
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Afiliação: |
MARTA CRISTINA CORSI DE FILIPPI, CNPAF; GISELE BARATA DA SILVA, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; VALACIA LEMES DA SILVA LOBO, CNPAF; MARCIO VINICIUS DE C BARROS CORTES, CNPAF; ALESSANDRA JACKELINE G. MORAES, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; ANNE SITARAMA PRABHU. |
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Título: |
Leaf blast (Magnaporthe oryzae) suppression and growth promotion by rhizobacteria on aerobic rice in Brazil. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Biological Control, San Diego, v. 58, n. 2, p. 160-166, Aug. 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
Rice blast caused by Magnaporthe oryzae has the potential to cause 100% grain yield loss. The objective of this investigation was to identify rhizobacteria showing potential for plant growth stimulation and resistance induction under greenhouse conditions. Bacterial isolates were collected from the rhizosphere of rice plants from soils of Amazon, PA. Soil application with rhizobacteria was done by drenching with bacterial cell suspension before inoculating with virulent isolate of M. oryzae. Mass screening of 148 isolates for growth promotion showed that 12.7% stimulated plant height, whereas 52.0% increased root length, total biomass and root biomass. Based on these growth promotion results, 18 isolates were further tested for in vitro inhibition of the pathogen and reduction of leaf blast severity (LBS) in greenhouse test. All isolates inhibited pathogen growth and reduced disease severity from 16% to 95%. The two isolates showing the greatest suppression of leaf blast (Rizo-46 and Rizo-55) were further tested in a subsequent greenhouse trial using three replications and three application methods (drenching the soil, 15 and 2 days before inoculation with rice pathogen, and spraying 2 days before inoculating with virulent isolate). The soil drenching with isolate Rizo-55, 15 days prior to challenging with virulent isolate of M. oryzae reduced LBS by 90%, whereas Rizo-46 applied 2 days before reduced LBS by 95%. The capacity to suppress leaf blast by isolates Rizo-46 and Rizo-55 varied according to the mode of application. Also, the enzymatic tests were conducted to quantitate the presence of proteins related to pathogenesis (PRPs) during induction process of resistance by rhizobacteria. The enzyme activity of peroxidase, b-1,3-glucanase and chitinase greatly increased, and the results are in accord with greenhouse tests in relation to leaf blast disease suppression. MenosRice blast caused by Magnaporthe oryzae has the potential to cause 100% grain yield loss. The objective of this investigation was to identify rhizobacteria showing potential for plant growth stimulation and resistance induction under greenhouse conditions. Bacterial isolates were collected from the rhizosphere of rice plants from soils of Amazon, PA. Soil application with rhizobacteria was done by drenching with bacterial cell suspension before inoculating with virulent isolate of M. oryzae. Mass screening of 148 isolates for growth promotion showed that 12.7% stimulated plant height, whereas 52.0% increased root length, total biomass and root biomass. Based on these growth promotion results, 18 isolates were further tested for in vitro inhibition of the pathogen and reduction of leaf blast severity (LBS) in greenhouse test. All isolates inhibited pathogen growth and reduced disease severity from 16% to 95%. The two isolates showing the greatest suppression of leaf blast (Rizo-46 and Rizo-55) were further tested in a subsequent greenhouse trial using three replications and three application methods (drenching the soil, 15 and 2 days before inoculation with rice pathogen, and spraying 2 days before inoculating with virulent isolate). The soil drenching with isolate Rizo-55, 15 days prior to challenging with virulent isolate of M. oryzae reduced LBS by 90%, whereas Rizo-46 applied 2 days before reduced LBS by 95%. The capacity to suppress leaf blast by isolates Rizo-46 and Riz... Mostrar Tudo |
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Thesagro: |
Arroz; Brusone; Doença de planta; Oryza sativa. |
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Thesaurus Nal: |
Magnaporthe oryzae. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02610naa a2200241 a 4500
001 1894505
005 2014-12-12
008 2011 bl uuuu u00u1 u #d
100 1 $aFILIPPI, M. C. C.
245 $aLeaf blast (Magnaporthe oryzae) suppression and growth promotion by rhizobacteria on aerobic rice in Brazil.
260 $c2011
520 $aRice blast caused by Magnaporthe oryzae has the potential to cause 100% grain yield loss. The objective of this investigation was to identify rhizobacteria showing potential for plant growth stimulation and resistance induction under greenhouse conditions. Bacterial isolates were collected from the rhizosphere of rice plants from soils of Amazon, PA. Soil application with rhizobacteria was done by drenching with bacterial cell suspension before inoculating with virulent isolate of M. oryzae. Mass screening of 148 isolates for growth promotion showed that 12.7% stimulated plant height, whereas 52.0% increased root length, total biomass and root biomass. Based on these growth promotion results, 18 isolates were further tested for in vitro inhibition of the pathogen and reduction of leaf blast severity (LBS) in greenhouse test. All isolates inhibited pathogen growth and reduced disease severity from 16% to 95%. The two isolates showing the greatest suppression of leaf blast (Rizo-46 and Rizo-55) were further tested in a subsequent greenhouse trial using three replications and three application methods (drenching the soil, 15 and 2 days before inoculation with rice pathogen, and spraying 2 days before inoculating with virulent isolate). The soil drenching with isolate Rizo-55, 15 days prior to challenging with virulent isolate of M. oryzae reduced LBS by 90%, whereas Rizo-46 applied 2 days before reduced LBS by 95%. The capacity to suppress leaf blast by isolates Rizo-46 and Rizo-55 varied according to the mode of application. Also, the enzymatic tests were conducted to quantitate the presence of proteins related to pathogenesis (PRPs) during induction process of resistance by rhizobacteria. The enzyme activity of peroxidase, b-1,3-glucanase and chitinase greatly increased, and the results are in accord with greenhouse tests in relation to leaf blast disease suppression.
650 $aMagnaporthe oryzae
650 $aArroz
650 $aBrusone
650 $aDoença de planta
650 $aOryza sativa
700 1 $aSILVA, G. B. da
700 1 $aSILVA-LOBO, V. L.
700 1 $aCORTES, M. V. C. B.
700 1 $aMORAES, A. J. G.
700 1 $aPRABHU, A. S.
773 $tBiological Control, San Diego$gv. 58, n. 2, p. 160-166, Aug. 2011.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
25/05/1999 |
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Data da última atualização: |
11/05/2017 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SCHROTH, G.; BARROS, E.; RODRIGUES, M. R. L.; LEHMANN, J. |
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Afiliação: |
University of Hamburg; INPA; Embrapa Amazonia Ocidental; University of Bayreuth.; MARIA DO ROSARIO LOBATO RODRIGUES, CPAA. |
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Título: |
Plant-soil interactions in muti-strata agroforestry systems with perennial crops. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
In: INTERNATIONAL SYMPOSIUM MULTI-STRATA AGROFORESTRY SYSTEMS WITH PERENNIAL CROPS, 1999, Turrialba. Multy-strata agroforestry systems with perennial crops: proceedings. Turrialba: CATIE, 1999. p. 76-79. |
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Idioma: |
Inglês |
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Conteúdo: |
Study on organization of the available information on plant-soil interactions in multi-strata agroforestry with perennial crops with the objetive of developing strategies for the optimization of resource use and maximization of environmental benefits of such systems. Conclusions: plant-soil interactions in multi-strata agroforestry systems have received insufficient attention by researcher in the past, presumably because of methodological difficulties. Using the methodological principles outline above, more research efforts should be invested in these systems, taking into consideration the following issues: a) how much competition between associated plants is necessary for optimum use of soil resources? How can competition be monitored and fine-tuned within agroforestry systems with perennial crops?; b) fertilizer use eficiency of whole systems as influenced by different tree components and management practices; c) establishment methods for plantations which favour the development of the tree crops, taking into consideration the limited funds of many tropical samllholders; and d) possibilities to manage the biological agents of soil fertility, especially the quantification of the agronomic value of soil biodiversity and methods of conserving and increasing it in agroforestry systems. |
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Palavras-Chave: |
Agrofloresta; Amazonas; Brasil; Manaus; Plant soil relations. |
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Thesagro: |
Cultivo Perene; Fertilidade do Solo; Floresta Tropical Úmida; Relação Solo-Planta. |
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Thesaurus NAL: |
agroforestry; perennials; soil fertility; tropical rain forests. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/159704/1/Pag-76-79.pdf
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Marc: |
LEADER 02294nam a2200301 a 4500
001 1668207
005 2017-05-11
008 1999 bl uuuu u00u1 u #d
100 1 $aSCHROTH, G.
245 $aPlant-soil interactions in muti-strata agroforestry systems with perennial crops.
260 $aIn: INTERNATIONAL SYMPOSIUM MULTI-STRATA AGROFORESTRY SYSTEMS WITH PERENNIAL CROPS, 1999, Turrialba. Multy-strata agroforestry systems with perennial crops: proceedings. Turrialba: CATIE, 1999. p. 76-79.$c1999
520 $aStudy on organization of the available information on plant-soil interactions in multi-strata agroforestry with perennial crops with the objetive of developing strategies for the optimization of resource use and maximization of environmental benefits of such systems. Conclusions: plant-soil interactions in multi-strata agroforestry systems have received insufficient attention by researcher in the past, presumably because of methodological difficulties. Using the methodological principles outline above, more research efforts should be invested in these systems, taking into consideration the following issues: a) how much competition between associated plants is necessary for optimum use of soil resources? How can competition be monitored and fine-tuned within agroforestry systems with perennial crops?; b) fertilizer use eficiency of whole systems as influenced by different tree components and management practices; c) establishment methods for plantations which favour the development of the tree crops, taking into consideration the limited funds of many tropical samllholders; and d) possibilities to manage the biological agents of soil fertility, especially the quantification of the agronomic value of soil biodiversity and methods of conserving and increasing it in agroforestry systems.
650 $aagroforestry
650 $aperennials
650 $asoil fertility
650 $atropical rain forests
650 $aCultivo Perene
650 $aFertilidade do Solo
650 $aFloresta Tropical Úmida
650 $aRelação Solo-Planta
653 $aAgrofloresta
653 $aAmazonas
653 $aBrasil
653 $aManaus
653 $aPlant soil relations
700 1 $aBARROS, E.
700 1 $aRODRIGUES, M. R. L.
700 1 $aLEHMANN, J.
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Embrapa Amazônia Ocidental (CPAA) |
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