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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
16/04/2004 |
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Data da última atualização: |
16/04/2004 |
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Autoria: |
GOMEZ-VASQUEZ, R.; DAY, R. C.; BEECHING, J. R.; COOPER, R. M. |
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Título: |
Biochemical components of disease resistance of cassava. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Revista Brasileira de Mandioca, Salvador, v. 17, p. 40, nov., 1998., Suplemento. |
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Idioma: |
Inglês |
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Conteúdo: |
Resistant genotypes offer the only durable, practicable means of controlling Xanthomonas bacterial bligth, but the nature of defences of cassava to this and to other diseases are virtually unknown. Suspension cultured cells in vitro show a series of resistance related responses to a range of microbial elicitors such as glucans from yeast and Colletotrichum, and to certain endogenous elicitors such as oligogalacturonides, jasmonic acid and glutathione. Surprisingly, pure LPS was ineffective but crude commercial EPS [xanthan] had effect. Auxin levels had a profound influence on intensity of cellular responses. This facile system has revealed a rapid [from 3 mins] and intensive, extracellular oxidative burst [as MO2] which can function as a first fine of defence by creating toxic Conditions, cross-linking cell wall components and as a diffusible signal. Subsequently, defence-related genes such as PAL are induced which may contribute to formation of flavonoids and antibacterial compounds. The oxidative burst may derive in part from the increased activity or production of peroxidase or from xanthine oxidase which is constitutive; gene[s] for the latter are under study. Similarly, in plants in response to incompatible bacterial pathogens, there is rapid generation of peroxide associated with plant cell walls, as revealed by cerium chloride and transmission EM; other localised increased were in peroxidase, PAL and its mRNA [revealed by in situ hybridisation], flavonoids and unknown antibacterial compounds. Catalase was down-regulated which may serve to maintain high levels of peroxide. Latex is readily released on cell damage and contains constitutuve Iysozyme but it has relatively little effect on X campestris pv. manihotis [syn. Xanonopodis]. Menos Resistant genotypes offer the only durable, practicable means of controlling Xanthomonas bacterial bligth, but the nature of defences of cassava to this and to other diseases are virtually unknown. Suspension cultured cells in vitro show a series of resistance related responses to a range of microbial elicitors such as glucans from yeast and Colletotrichum, and to certain endogenous elicitors such as oligogalacturonides, jasmonic acid and glutathione. Surprisingly, pure LPS was ineffective but crude commercial EPS [xanthan] had effect. Auxin levels had a profound influence on intensity of cellular responses. This facile system has revealed a rapid [from 3 mins] and intensive, extracellular oxidative burst [as MO2] which can function as a first fine of defence by creating toxic Conditions, cross-linking cell wall components and as a diffusible signal. Subsequently, defence-related genes such as PAL are induced which may contribute to formation of flavonoids and antibacterial compounds. The oxidative burst may derive in part from the increased activity or production of peroxidase or from xanthine oxidase which is constitutive; gene[s] for the latter are under study. Similarly, in plants in response to incompatible bacterial pathogens, there is rapid generation of peroxide associated with plant cell walls, as revealed by cerium chloride and transmission EM; other localised increased were in peroxidase, PAL and its mRNA [revealed by in situ hybridisation], flavonoids and unknow... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02220naa a2200157 a 4500
001 1651923
005 2004-04-16
008 1998 bl uuuu u00u1 u #d
100 1 $aGOMEZ-VASQUEZ, R.
245 $aBiochemical components of disease resistance of cassava.
260 $c1998
520 $aResistant genotypes offer the only durable, practicable means of controlling Xanthomonas bacterial bligth, but the nature of defences of cassava to this and to other diseases are virtually unknown. Suspension cultured cells in vitro show a series of resistance related responses to a range of microbial elicitors such as glucans from yeast and Colletotrichum, and to certain endogenous elicitors such as oligogalacturonides, jasmonic acid and glutathione. Surprisingly, pure LPS was ineffective but crude commercial EPS [xanthan] had effect. Auxin levels had a profound influence on intensity of cellular responses. This facile system has revealed a rapid [from 3 mins] and intensive, extracellular oxidative burst [as MO2] which can function as a first fine of defence by creating toxic Conditions, cross-linking cell wall components and as a diffusible signal. Subsequently, defence-related genes such as PAL are induced which may contribute to formation of flavonoids and antibacterial compounds. The oxidative burst may derive in part from the increased activity or production of peroxidase or from xanthine oxidase which is constitutive; gene[s] for the latter are under study. Similarly, in plants in response to incompatible bacterial pathogens, there is rapid generation of peroxide associated with plant cell walls, as revealed by cerium chloride and transmission EM; other localised increased were in peroxidase, PAL and its mRNA [revealed by in situ hybridisation], flavonoids and unknown antibacterial compounds. Catalase was down-regulated which may serve to maintain high levels of peroxide. Latex is readily released on cell damage and contains constitutuve Iysozyme but it has relatively little effect on X campestris pv. manihotis [syn. Xanonopodis].
700 1 $aDAY, R. C.
700 1 $aBEECHING, J. R.
700 1 $aCOOPER, R. M.
773 $tRevista Brasileira de Mandioca, Salvador$gv. 17, p. 40, nov., 1998., Suplemento.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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| Registros recuperados : 46 | |
| 4. |  | LISI, C. S.; TOMAZELLO FILHO, M.; BOTOSSO, P. C. Carbon biomass in tree rings of Balfourodendron riedelianum and Esenbeckia leiocarpa, in the Southeast of Brazil. In: IUFRO World Congress, 22., 2005, Brisbane. Forests in the balance: linking tradition and technology: program & abstracts. [Vienna]: IUFRO, 2005. 1 CD-ROM. Também publicado no The International Forestry Review, Oxford, v. 7, n. 5, p. 330, Aug. 2005. Resumo.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| 16. | | MATTOS, P. P. de; BOTOSSO, P. C.; CARVALHO, P. E. R.; TOMAZELLO FILHO, M. Growth periodicity of Ocotea porosa and Araucaria angustifolia from plantation in the southern Brazil. In: IUFRO World Congress, 22., 2005, Brisbane. Forests in the balance: linking tradition and technology: program & abstracts. [Vienna]: IUFRO, 2005. 1 CD-ROM. Também publicado no The International Forestry Review, Oxford, v. 7, n. 5, p. 75, Aug. 2005. Resumo.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| 17. | | BOTOSSO, P. C.; TOMAZELLO FILHO, M.; BATISTA, M. V. R.; LISI, C. S. Growth rhythm of Copaifera langsdorffii Desf. (Kuntze) trees, Caesalpiniaceae, under different conditions in a semi-deciduous seasonal forest in southwest of São Paulo State, Brazil. In: INTERNATIONAL SYMPOSIUM ON WOOD SCIENCES, 2004, Montpellier. Proceedings. [S.l]: IAWA, 2004. p. 6-7 Resumo.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| 18. | | CORDELLI, R. L.; MATTOS, P. P.; BOTOSSO, P. C.; CARVALHO, P. E. R.; TOMAZELLO FILHO, M. Ritmo de crescimento de três espécies de Ocotea (Lauraceae), sob condições de plantio. In: CONGRESSO NACIONAL DE BOTÂNICA, 55.; REUNIÃO REGIONAL DE BOTÂNICOS DE MG, BA E ES, 26., 2004, Viçosa. Conservação, bioprospecção e biotecnologia:[resumos]. Viçosa: Sociedade Botânica do Brasil: Universidade Federal Viçosa, 2004. CD ROM. Resumo.| Biblioteca(s): Embrapa Florestas. |
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| 19. | | TOMAZELLO FILHO, M.; LISI, C. S.; BOTOSSO, P. C.; ROIG, F. A. Dendrocronologia aplicada no estudo de espécies de florestas estacionais semi-decíduas da Região Sudeste do Brasil. In: CONGRESSO NACIONAL DE BOTÂNICA, 61., 2010, Manaus. Diversidade vegetal brasileira: conhecimento, conservação e uso. Manaus: SBB, 2010. Conferências, simpósios e mesas-redondas. p. 222-226.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| 20. | | CARDOSO, N. S.; DÉTIENNE, P.; TOMAZELLO FILHO, M.; BOTOSSO, P. C. Diferenciação anatômica da madeira de alguns gêneros de Leguminosae Caesalpinioideae procedentes da América do Sul, Ásia e África. In: SIMPÓSIO BRASILEIRO DE ANATOMIA DE MADEIRA, 1., 2007, Mariporã. Livro de resumos do I SIMBRAMAD. São Paulo: Universidade de São Paulo, Instituto de Biociências, 2007. p. 33-34. SIMBRAMAD.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| Registros recuperados : 46 | |
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