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Registro Completo
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
29/06/2007 |
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Data da última atualização: |
03/01/2024 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
BARRETO, A. L. H.; ELOY, Y. R. G.; MATOS, T. E. de; MARTINS-MIRANDA, A. S.; FREIRE, F. C. O.; FREIRE FILHO, F. R.; VASCONCELOS, I. M.; OLIVEIRA, J. T. A. |
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Título: |
Host defense responses restricts the growth of the fungus Colletotrichum lindemuthianum in cowpea, TE 97 411-1E resistant genotype. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
In: CONGRESSO NACIONAL DE FEIJÃO-CAUPI, 1.; REUNIÃO NACIONAL DE FEIJÃO-CAUPI, 6., 2006, Teresina. Tecnologias para o agronegócio: anais. Teresina: Embrapa Meio-Norte, 2006. |
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Descrição Física: |
1 CD-ROM. |
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Série: |
(Embrapa Meio-Norte. Documentos, 121). |
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Idioma: |
Inglês |
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Conteúdo: |
Cowpea is the main subsistence crop in the semiarid North-east of Brazil. However, very few is known concerning to its defense mechanisms against fungi. The objective of this present work was to evaluate the infection strategies of the hemibiotrophic fungi Colletotrichum lindemuthianum and the associated cytological defense responses of two cowpea genotypes, TE 97-411-1E (resistant) and BR 3 Tracuateua (susceptible). The infection process of the fungi in both genotypes occurred preferentially through the leaf epidermal cells by penetration tubes emerged from appressoria. The resistant cowpea genotype, TE 97-411-1E, showed enhanced penetration resistance to C. lindemuthianum associated with higher epidermal H2O2 accumulation, papilla formation, and increase in phenylalanine ammonialyase activity, possibly related to accumulation of phenolic compounds and host cell wall lignification. Macroscopic examination of the primary leaves revealed the presence of shrunken necrotic lesions characteristic of anthracnose in infected BR 3 Tracuateua, whereas in TE 97-411-1E cell death was also observed but only in a reduced percentage of the infection sites. In summary the results obtained in the present study suggested that TE 97-411-1E genotype is more resistant to C. lindemuthianum compared to BR 3 Tracuateua, as it developed more effective defense responses against the establishment of the pathogen. |
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Palavras-Chave: |
Colletotricum lindemuthianum; Feijão-caupi; Infection process; Processo de infecção. |
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Thesagro: |
Colletotrichum Lindemuthianum; Vigna Unguiculata. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/94327/1/FS12.pdf
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Marc: |
LEADER 02497nam a2200289 a 4500
001 1068871
005 2024-01-03
008 2006 bl uuuu u00u1 u #d
100 1 $aBARRETO, A. L. H.
245 $aHost defense responses restricts the growth of the fungus Colletotrichum lindemuthianum in cowpea, TE 97 411-1E resistant genotype.$h[electronic resource]
260 $aIn: CONGRESSO NACIONAL DE FEIJÃO-CAUPI, 1.; REUNIÃO NACIONAL DE FEIJÃO-CAUPI, 6., 2006, Teresina. Tecnologias para o agronegócio: anais. Teresina: Embrapa Meio-Norte$c2006
300 $c1 CD-ROM.
490 $a(Embrapa Meio-Norte. Documentos, 121).
520 $aCowpea is the main subsistence crop in the semiarid North-east of Brazil. However, very few is known concerning to its defense mechanisms against fungi. The objective of this present work was to evaluate the infection strategies of the hemibiotrophic fungi Colletotrichum lindemuthianum and the associated cytological defense responses of two cowpea genotypes, TE 97-411-1E (resistant) and BR 3 Tracuateua (susceptible). The infection process of the fungi in both genotypes occurred preferentially through the leaf epidermal cells by penetration tubes emerged from appressoria. The resistant cowpea genotype, TE 97-411-1E, showed enhanced penetration resistance to C. lindemuthianum associated with higher epidermal H2O2 accumulation, papilla formation, and increase in phenylalanine ammonialyase activity, possibly related to accumulation of phenolic compounds and host cell wall lignification. Macroscopic examination of the primary leaves revealed the presence of shrunken necrotic lesions characteristic of anthracnose in infected BR 3 Tracuateua, whereas in TE 97-411-1E cell death was also observed but only in a reduced percentage of the infection sites. In summary the results obtained in the present study suggested that TE 97-411-1E genotype is more resistant to C. lindemuthianum compared to BR 3 Tracuateua, as it developed more effective defense responses against the establishment of the pathogen.
650 $aColletotrichum Lindemuthianum
650 $aVigna Unguiculata
653 $aColletotricum lindemuthianum
653 $aFeijão-caupi
653 $aInfection process
653 $aProcesso de infecção
700 1 $aELOY, Y. R. G.
700 1 $aMATOS, T. E. de
700 1 $aMARTINS-MIRANDA, A. S.
700 1 $aFREIRE, F. C. O.
700 1 $aFREIRE FILHO, F. R.
700 1 $aVASCONCELOS, I. M.
700 1 $aOLIVEIRA, J. T. A.
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Embrapa Meio-Norte (CPAMN) |
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