| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Café. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Café. |
|
Data corrente: |
14/03/2011 |
|
Data da última atualização: |
14/04/2011 |
|
Tipo da produção científica: |
Artigo em Anais de Congresso |
|
Autoria: |
RAMIRO, D. A.; ESCOUTE, J.; PETITOT, A.-S.; MALUF, M. P.; FERNANDEZ, D. |
|
Afiliação: |
IRD; CIRAD; IRD; MIRIAN PEREZ MALUF, SAPC; IRD/CIRAD. |
|
Título: |
Early haustoria development in coffee (Coffea arabica) - rust (hemileia vastatrix) interaction. |
|
Ano de publicação: |
2008 |
|
Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE ON COFFEE SCIENCE, 22. 2008, Campinas, São Paulo, Brazil. |
|
Idioma: |
Inglês |
|
Conteúdo: |
According to their lifestyle, plants parasitic fungi may be classified in necrotrophs which obtain nutrients from dead cells or biotrophs which obtain nutrients from living host tissue. A common feature of the biotrophs is the formation of specialized structures called haustoria, which are responsible for uptake of nutrients from the host cells they invaded. Avirulence (Avr) genes and their respective products that are recognized by the resistance proteins inside host cells may be specifically expressed in haustoria, leading to the rapid activation of defense responses against the fungus. The objective of this study was to assess the time-course of the orange rust fungus (Hemileia vastatrix) haustoria differentiation in coffee (Coffea arabica). Histological characterization of H. vastatrix (race II) development in Tupi (immune) and Catuai (sporulation level 4) was assessed by light microscopy examination of cross sections of infected leaf fragments stained with lactophenol blue. In both interactions, careful examination of infection sites made at 600x revealed that haustorial differentiation occurred as soon as the fungus enters stomata, much earlier than previously described in the literature. Haustorium mother cell (HMC) and haustoria (termed “pioneers haustoria”) were found in the guard and adjacent cells of the stomata, before the colonization of parenchyma had occurred. In all interactions, after pioneer haustoria differentiation, the fungus displayed the usual sequence of growth stages: anchor, new HMC and haustoria development in stomatal cells and in the parenchyma. Until 36 hours after inoculation, rust development in the two cultivars did not differ. Examination of host cell death, characteristic of the hypersensitive reaction in resistant varieties, and of defense genes regulation during rust infection are currently being examined to assess the coffee resistance responses linked to pioneers haustoria formation. MenosAccording to their lifestyle, plants parasitic fungi may be classified in necrotrophs which obtain nutrients from dead cells or biotrophs which obtain nutrients from living host tissue. A common feature of the biotrophs is the formation of specialized structures called haustoria, which are responsible for uptake of nutrients from the host cells they invaded. Avirulence (Avr) genes and their respective products that are recognized by the resistance proteins inside host cells may be specifically expressed in haustoria, leading to the rapid activation of defense responses against the fungus. The objective of this study was to assess the time-course of the orange rust fungus (Hemileia vastatrix) haustoria differentiation in coffee (Coffea arabica). Histological characterization of H. vastatrix (race II) development in Tupi (immune) and Catuai (sporulation level 4) was assessed by light microscopy examination of cross sections of infected leaf fragments stained with lactophenol blue. In both interactions, careful examination of infection sites made at 600x revealed that haustorial differentiation occurred as soon as the fungus enters stomata, much earlier than previously described in the literature. Haustorium mother cell (HMC) and haustoria (termed “pioneers haustoria”) were found in the guard and adjacent cells of the stomata, before the colonization of parenchyma had occurred. In all interactions, after pioneer haustoria differentiation, the fungus displayed the usual sequence... Mostrar Tudo |
|
Palavras-Chave: |
Coffee; Parasitic fungi. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02546nam a2200181 a 4500
001 1880633
005 2011-04-14
008 2008 bl uuuu u00u1 u #d
100 1 $aRAMIRO, D. A.
245 $aEarly haustoria development in coffee (Coffea arabica) - rust (hemileia vastatrix) interaction.$h[electronic resource]
260 $aIn: INTERNATIONAL CONFERENCE ON COFFEE SCIENCE, 22. 2008, Campinas, São Paulo, Brazil.$c2008
520 $aAccording to their lifestyle, plants parasitic fungi may be classified in necrotrophs which obtain nutrients from dead cells or biotrophs which obtain nutrients from living host tissue. A common feature of the biotrophs is the formation of specialized structures called haustoria, which are responsible for uptake of nutrients from the host cells they invaded. Avirulence (Avr) genes and their respective products that are recognized by the resistance proteins inside host cells may be specifically expressed in haustoria, leading to the rapid activation of defense responses against the fungus. The objective of this study was to assess the time-course of the orange rust fungus (Hemileia vastatrix) haustoria differentiation in coffee (Coffea arabica). Histological characterization of H. vastatrix (race II) development in Tupi (immune) and Catuai (sporulation level 4) was assessed by light microscopy examination of cross sections of infected leaf fragments stained with lactophenol blue. In both interactions, careful examination of infection sites made at 600x revealed that haustorial differentiation occurred as soon as the fungus enters stomata, much earlier than previously described in the literature. Haustorium mother cell (HMC) and haustoria (termed “pioneers haustoria”) were found in the guard and adjacent cells of the stomata, before the colonization of parenchyma had occurred. In all interactions, after pioneer haustoria differentiation, the fungus displayed the usual sequence of growth stages: anchor, new HMC and haustoria development in stomatal cells and in the parenchyma. Until 36 hours after inoculation, rust development in the two cultivars did not differ. Examination of host cell death, characteristic of the hypersensitive reaction in resistant varieties, and of defense genes regulation during rust infection are currently being examined to assess the coffee resistance responses linked to pioneers haustoria formation.
653 $aCoffee
653 $aParasitic fungi
700 1 $aESCOUTE, J.
700 1 $aPETITOT, A.-S.
700 1 $aMALUF, M. P.
700 1 $aFERNANDEZ, D.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Café (CNPCa) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 69 | |
| 26. |  | ORTEGA, H. M.; PADILHA, L.; GUERREIRO FILHO, O.; GONÇALVES, W.; MALUF, M. P.; BRAGINI, M. T. Microssatellite for fingerprinting Coffea arabica clones. In: INTERNATIONAL CONFERENCE ON COFFEE SCIENCE, 24., 2012, Costa Rica. Programme & abstracts. [S.l.]: Association for Science and Information on Coffee, 2012. p. 202| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Café. |
|    |
| 28. | | MALUF, M. P.; SILVESTRINI, M.; RUGGIERO, L. M. de C.; GUERREIRO FILHO, O.; COLOMBO, C. A. Genetic diversity of cultivated Coffea arabica inbred lines assessed by RAPD, AFLP and SSR marker systems. Scientia Agricola, v. 62, n. 4, p. 366-373, 2005. Título em português: Caracterização da diversidade genética de linhagens comerciais de Coffea arabica através de marcadores moleculares do tipo RAPD, AFLP e SSR.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Café. |
|  |
| 33. | | RAMIRO, D. A.; TOMA-BRAGHINI, M.; PETITOT, A. -S.; MALUF, M. P.; FERNANDEZ, D. Use of leaf-disk technique for gene expression analysis of the coffee responses to Hemileia vastatrix Infection. In:INTERNATIONAL CONFERENCE ON COFFEE SCIENCE, 21., 2006, Montpellier, France. Table of contents... Montpellier, France: Association for Science and Information on Coffee, 2007. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Café. |
| |
| 34. | | PEZZOPANE, C. de G.; FAVARIN, J. L.; MALUF, M. P.; PEZZOPANE, J. R. M.; GUERREIRO FILHO, O. Atributos fenológicos e agronômicos em cultivares de cafeeiro arábica. In.: CIÊNCIA RURAL, Santa Maria, v.39, n.3, p.711-717, mai-jun. 2009. Título em inglês: Phenological and agronimic attributes in arabica cultivars of coffee tree.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Café. |
| |
| 35. | | MARTINATI, J. C.; CARDOSO, D. C.; GUERREIRO-FILHO, O.; VIDAL, R. O.; CARAZZOLLE, M. F.; MALUF, M. P. Caracterização molecular da interação cafeeiro/bicho-mineiro. In: SIMPÓSIO DE PESQUISA DOS CAFÉS DO BRASIL, 7., 2011, Araxá. Anais... Brasília, DF: Embrapa Café, 2011.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Café. |
| |
| 36. | | SEVERINO, F. E.; BRANDALISE, M.; COSTA, C. S.; WILCKEN, S. R. S.; MALUF, M. P.; GONÇALVES, W.; MAIA, I. G. CaPrx, a Coffea arabica gene encoding a putative class III peroxidase induced by root-knot nematode infection. Plant Science, Limerick, v. 191-192, p. 35-42, 2012.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Café. |
| |
| 37. | | MARTINATI, J. de C.; MOLINA, J. V. D.; BONTURI, N.; MARTARELLO, F. H. H.; GUERREIRO FILHO, O.; MALUF, M. P. Expressão de genes relacionados ao metabolismo de nitrogênio, fósforo de potássio em cafeeiros submetidos ao estresse biótico. In: SIMPÓSIO DE PESQUISA DOS CAFÉS DO BRASIL, 6., 2009, Vitória. Inovação científica, competitividade e mudanças climáticas: anais... Vitória: Consórcio Pesquisa Café, 2009.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Café. |
| |
| 38. | | MAIA, F. M.; STRAZZA, B. A.; SCHENK, J. C. M.; PADILHA, L.; GUERREIRO-FILHO, O.; MALUF, M. P. Expressão gênica em resposta a deficiência nutricional em folhas resistentes e suscetíveis ao bicho-mineiro. In: SIMPÓSIO DE PESQUISA DOS CAFÉS DO BRASIL, 9., 2015, Curitiba. Anais... Brasília, DF: Embrapa Café, 2015.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Café. |
| |
| 40. | | GASPARI-PEZZOPANE, C. de; FAVARIN, J. L.; MALUF, M. P.; PEZZOPANE, J. R. M.; MISTRO, J. C.; SALGADO, P. R. Metodologia para avaliação do comportamento fenológico de cultivares de Coffea arabica. In: SIMPÓSIO DE PESQUISA DOS CAFÉS DO BRASIL, 5., 2007, Águas de Lindóia. Anais... Brasília, DF: Embrapa Café, 2007.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Café. |
| |
| Registros recuperados : 69 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
