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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
05/11/2013 |
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Data da última atualização: |
05/11/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SENA, A. P. A.; CHAIBUB, A. A.; CORTÊS, M. V. C. B.; SILVA, G. B.; SILVA-LOBO, V. L.; PRABHU, A. S.; FILIPPI, M. C. C.; ARAÚJO, L. G. |
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Afiliação: |
ANA P. A. SENA, UFG; AMANDA A. CHAIBUB, UFG; MARCIO VINICIUS DE C BARROS CORTES, CNPAF; GISELE B. SILVA, UFRA; VALACIA LEMES DA SILVA LOBO, CNPAF; ANNE SITARAMA PRABHU, CNPAF; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; LEILA G. ARAÚJO, UFG. |
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Título: |
Increased enzymatic activity in rice leaf blast suppression by crude extract of Epicoccum sp. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Tropical Plant Pathology, Brasília, DF, v. 38, n. 5, p. 387-397, set./out. 2013. |
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ISSN: |
1982-5676 |
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Idioma: |
Inglês |
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Conteúdo: |
Epicoccum sp. showed in vitro antagonism to the rice pathogens Magnaporthe oryzae, Rhizoctonia solani, Sarocladium oryzae, Monographella albescens and Cochliobolus miyabeanus in dual culture. The colony growth of the rice blast fungus, M. oryzae, was reduced by 42.50%. The lethal doses (LD50) determined based on probit-log dosage response curves at 3 and 6 hours after germination were 393.0 and 326.6 ppm, respectively. The crude extract (600 ppm) reduced appressorial formation by 95.68%. A greenhouse experiment comparing the relative efficiency of conidial suspension and crude extract of Epicoccum sp. in the suppression of leaf blast showed no statistical difference between both application methods. However, the crude extract of Epicoccum sp. (4000 ppm) 48 hours before the application of M. oryzae induced resistance and suppressed leaf blast by 97.6%. Scanning electron microscopy of rice leaves inoculated with crude extract of Epicoccum sp. and challenged with M. oryzae showed appressorial deformation on penetration phase. Peroxidase and β-1,3-glucanase activities increased in plants sprayed with crude extract of Epicoccum sp., 24 hours after the application of the challenger. PAL as well as chitinase activities increased 72 hours after challenge inoculation. Epicoccum sp. was shown to be a potential antagonist and inducer of resistance against M. oryzae. |
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Palavras-Chave: |
Epicoccum sp. |
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Thesagro: |
Antagonismo; 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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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/91934/1/mcf.pdf
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Marc: |
LEADER 02257naa a2200301 a 4500
001 1970331
005 2013-11-05
008 2013 bl uuuu u00u1 u #d
022 $a1982-5676
100 1 $aSENA, A. P. A.
245 $aIncreased enzymatic activity in rice leaf blast suppression by crude extract of Epicoccum sp.$h[electronic resource]
260 $c2013
520 $aEpicoccum sp. showed in vitro antagonism to the rice pathogens Magnaporthe oryzae, Rhizoctonia solani, Sarocladium oryzae, Monographella albescens and Cochliobolus miyabeanus in dual culture. The colony growth of the rice blast fungus, M. oryzae, was reduced by 42.50%. The lethal doses (LD50) determined based on probit-log dosage response curves at 3 and 6 hours after germination were 393.0 and 326.6 ppm, respectively. The crude extract (600 ppm) reduced appressorial formation by 95.68%. A greenhouse experiment comparing the relative efficiency of conidial suspension and crude extract of Epicoccum sp. in the suppression of leaf blast showed no statistical difference between both application methods. However, the crude extract of Epicoccum sp. (4000 ppm) 48 hours before the application of M. oryzae induced resistance and suppressed leaf blast by 97.6%. Scanning electron microscopy of rice leaves inoculated with crude extract of Epicoccum sp. and challenged with M. oryzae showed appressorial deformation on penetration phase. Peroxidase and β-1,3-glucanase activities increased in plants sprayed with crude extract of Epicoccum sp., 24 hours after the application of the challenger. PAL as well as chitinase activities increased 72 hours after challenge inoculation. Epicoccum sp. was shown to be a potential antagonist and inducer of resistance against M. oryzae.
650 $aMagnaporthe oryzae
650 $aAntagonismo
650 $aArroz
650 $aBrusone
650 $aDoença de planta
650 $aOryza sativa
653 $aEpicoccum sp
700 1 $aCHAIBUB, A. A.
700 1 $aCORTÊS, M. V. C. B.
700 1 $aSILVA, G. B.
700 1 $aSILVA-LOBO, V. L.
700 1 $aPRABHU, A. S.
700 1 $aFILIPPI, M. C. C.
700 1 $aARAÚJO, L. G.
773 $tTropical Plant Pathology, Brasília, DF$gv. 38, n. 5, p. 387-397, set./out. 2013.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
30/08/2005 |
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Data da última atualização: |
30/08/2005 |
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Autoria: |
PILLON, C. N.; MIELNICZUK, J.; MARTIN-NETO, L. |
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Título: |
Alterações no conteúdo e qualidade da matéria orgânica do solo induzidas por sistemas de cultura sob plantio direto. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 28., 2001, Londrina. Resumos... Sociedade Brasileira de Ciência do Solo, 2001. p. 258, ref. 0913. |
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Idioma: |
Português |
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Conteúdo: |
Há consenso que sistemas conservacionais de manejo aumentam o conteúdo de carbono organico total (COT) e nitrogênio total (NT) do solo... |
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Palavras-Chave: |
Sistemas de manejo. |
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Thesagro: |
Carbono; Hidrogênio. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00779naa a2200181 a 4500
001 1029056
005 2005-08-30
008 2001 bl --- 0-- u #d
100 1 $aPILLON, C. N.
245 $aAlterações no conteúdo e qualidade da matéria orgânica do solo induzidas por sistemas de cultura sob plantio direto.
260 $c2001
520 $aHá consenso que sistemas conservacionais de manejo aumentam o conteúdo de carbono organico total (COT) e nitrogênio total (NT) do solo...
650 $aCarbono
650 $aHidrogênio
653 $aSistemas de manejo
700 1 $aMIELNICZUK, J.
700 1 $aMARTIN-NETO, L.
773 $tIn: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 28., 2001, Londrina. Resumos... Sociedade Brasileira de Ciência do Solo, 2001. p. 258, ref. 0913.
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Embrapa Instrumentação (CNPDIA) |
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