|
|
Registro Completo |
Biblioteca(s): |
Embrapa Agrobiologia. |
Data corrente: |
26/04/1999 |
Data da última atualização: |
26/04/1999 |
Autoria: |
JAMES, E. K.; OLIVARES, F. L.; BALDANI, J. I.; DOBEREINER, Johanna. |
Título: |
Herbaspirillum, an endophytic diazotroph colonizing vascular tissue in leaves of Sorghum bicolor L. Moench. |
Ano de publicação: |
1997 |
Fonte/Imprenta: |
Journal of Experimental Botany, Oxford, v. 48, n. 308, p. 785-797, 1997. |
Idioma: |
Inglês |
Conteúdo: |
Leaves of Sorghum bicolor wre examined at 5 d and 14 d after inoculation with the N2-fixing endophytic bacteria Herbaspirillum seropedicae and Herbaspirillum rubrisubalbicans. Plants inoculated with H. rubrisubalbicans expressed symptoms of 'red stripe disease i.e. red stripes along the secondary veins of the leaf blade close to the inoculation point and spreading up the leaves. Infected leaves showed dense colonization by H. rubrisubalbicans in regions showing red stripe symptoms at 5 d after inoculation. The infection was confined within the vascular system, in particular, the protoxylem and associated lacunae, which were often completely filled with bacteria, with some of the latter expressing nitrogenase. The bacteria were recognized using H. rubrisubalb icans-specific antibodies and immunogold labelling, which also showed that the antibody reacted with material on the surface of the bacteria, and that this mucus was released into the lumen of the xylem. At 14 d after inoculation, disease symptoms were slightly more severe, with both meta- and protoxylem being even more heavily colonized in parts of the leaf showing red stripes. However, a strong host defence response was also apparent at this stage, with gums lining the walls of the vessels and enclosing the bacteria, although the latter were still actively dividing. At the edges of visible disease symptoms, plant gums filled the xylem; bacteria had formed distinct colonies within these gums, with some of the colonies associated with the xylem walls. Plants inoculated with H. seropedicae either did not express the disease or showed very mild symptoms close to the inoculation point. In the latter case, H. seropedicae were localized within protoxylem vessels and the metaxylem was partly occluded with plant-derived gums. By contrast with H. rubrisubalbicans, H. seropedicae was also localized in leaves at 14 d without disease symptoms and did not always appear to elicit a host response, i.e. they colonized the walls of metaxylem, with the xylem vessels themselves remaining unoccluded and largely free of gums. The fine line separating plant pathogens, endophytes and symbioses is discussed in light of these results. MenosLeaves of Sorghum bicolor wre examined at 5 d and 14 d after inoculation with the N2-fixing endophytic bacteria Herbaspirillum seropedicae and Herbaspirillum rubrisubalbicans. Plants inoculated with H. rubrisubalbicans expressed symptoms of 'red stripe disease i.e. red stripes along the secondary veins of the leaf blade close to the inoculation point and spreading up the leaves. Infected leaves showed dense colonization by H. rubrisubalbicans in regions showing red stripe symptoms at 5 d after inoculation. The infection was confined within the vascular system, in particular, the protoxylem and associated lacunae, which were often completely filled with bacteria, with some of the latter expressing nitrogenase. The bacteria were recognized using H. rubrisubalb icans-specific antibodies and immunogold labelling, which also showed that the antibody reacted with material on the surface of the bacteria, and that this mucus was released into the lumen of the xylem. At 14 d after inoculation, disease symptoms were slightly more severe, with both meta- and protoxylem being even more heavily colonized in parts of the leaf showing red stripes. However, a strong host defence response was also apparent at this stage, with gums lining the walls of the vessels and enclosing the bacteria, although the latter were still actively dividing. At the edges of visible disease symptoms, plant gums filled the xylem; bacteria had formed distinct colonies within these gums, with some of the colonies ... Mostrar Tudo |
Palavras-Chave: |
Bacterias; BNF; Diazotrofica; Diazotrophs; Endofito; FBN; Fixação biologica de nitrogênio; Nitrogen fixing bacteria. |
Thesagro: |
Bactéria; Folha; Xilema. |
Thesaurus Nal: |
endophytes; Herbaspirillum rubrisubalbicans; Herbaspirillum seropedicae; leaves; xylem. |
Categoria do assunto: |
-- |
Marc: |
LEADER 03180naa a2200349 a 4500 001 1621054 005 1999-04-26 008 1997 bl uuuu u00u1 u #d 100 1 $aJAMES, E. K. 245 $aHerbaspirillum, an endophytic diazotroph colonizing vascular tissue in leaves of Sorghum bicolor L. Moench. 260 $c1997 520 $aLeaves of Sorghum bicolor wre examined at 5 d and 14 d after inoculation with the N2-fixing endophytic bacteria Herbaspirillum seropedicae and Herbaspirillum rubrisubalbicans. Plants inoculated with H. rubrisubalbicans expressed symptoms of 'red stripe disease i.e. red stripes along the secondary veins of the leaf blade close to the inoculation point and spreading up the leaves. Infected leaves showed dense colonization by H. rubrisubalbicans in regions showing red stripe symptoms at 5 d after inoculation. The infection was confined within the vascular system, in particular, the protoxylem and associated lacunae, which were often completely filled with bacteria, with some of the latter expressing nitrogenase. The bacteria were recognized using H. rubrisubalb icans-specific antibodies and immunogold labelling, which also showed that the antibody reacted with material on the surface of the bacteria, and that this mucus was released into the lumen of the xylem. At 14 d after inoculation, disease symptoms were slightly more severe, with both meta- and protoxylem being even more heavily colonized in parts of the leaf showing red stripes. However, a strong host defence response was also apparent at this stage, with gums lining the walls of the vessels and enclosing the bacteria, although the latter were still actively dividing. At the edges of visible disease symptoms, plant gums filled the xylem; bacteria had formed distinct colonies within these gums, with some of the colonies associated with the xylem walls. Plants inoculated with H. seropedicae either did not express the disease or showed very mild symptoms close to the inoculation point. In the latter case, H. seropedicae were localized within protoxylem vessels and the metaxylem was partly occluded with plant-derived gums. By contrast with H. rubrisubalbicans, H. seropedicae was also localized in leaves at 14 d without disease symptoms and did not always appear to elicit a host response, i.e. they colonized the walls of metaxylem, with the xylem vessels themselves remaining unoccluded and largely free of gums. The fine line separating plant pathogens, endophytes and symbioses is discussed in light of these results. 650 $aendophytes 650 $aHerbaspirillum rubrisubalbicans 650 $aHerbaspirillum seropedicae 650 $aleaves 650 $axylem 650 $aBactéria 650 $aFolha 650 $aXilema 653 $aBacterias 653 $aBNF 653 $aDiazotrofica 653 $aDiazotrophs 653 $aEndofito 653 $aFBN 653 $aFixação biologica de nitrogênio 653 $aNitrogen fixing bacteria 700 1 $aOLIVARES, F. L. 700 1 $aBALDANI, J. I. 700 1 $aDOBEREINER, Johanna. 773 $tJournal of Experimental Botany, Oxford$gv. 48, n. 308, p. 785-797, 1997.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Agrobiologia (CNPAB) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Pantanal. Para informações adicionais entre em contato com cpap.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Pantanal. |
Data corrente: |
26/02/2009 |
Data da última atualização: |
18/01/2010 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - C |
Autoria: |
ADAMI, M.; FREITAS, R. M. de; PADOVANI, C. R.; SHIMAUKURO, Y. E.; MOREIRA, M. A. |
Afiliação: |
Marcos Adami, Instituto Nacional de Pesquisas Espaciais; Ramon Moraes de Freitas, Instituto Nacional de Pesquisas Espaciais; Carlos Roberto Padovani, Embrapa Pantanal; Yosio Edemir Shimabukuro, Instituto Nacional de Pesquisas Espaciais; Mauricio Alves Moreira, Instituto Nacional de Pesquisas Espaciais. |
Título: |
Estudo da dinâmica espaço-temporal do bioma Pantanal por meio de imagens MODIS. |
Ano de publicação: |
2008 |
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, v.43, n.10, p.1371-1378, 2008. |
Idioma: |
Português |
Conteúdo: |
O objetivo deste trabalho foi avaliar dados multitemporais, obtidos pelo sensor "moderate resolution imaging spectroradiometer" (MODIS), para o estudo da dinâmica espaço-temporal de duas sub-regiões do bioma Pantanal. The ojective of this work was to evaluate multitemporal data, obtained by moderate resolution imaging spectroradiometer (MODIS) sensor, for the study of spatial-temporal dynamics in two subregions of the Pantanal biome. |
Palavras-Chave: |
análise de agrupamento; série temporal; time series. |
Thesagro: |
Sensoriamento Remoto. |
Thesaurus NAL: |
cluster analysis; remote sensing. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01140naa a2200241 a 4500 001 1792230 005 2010-01-18 008 2008 bl --- 0-- u #d 100 1 $aADAMI, M. 245 $aEstudo da dinâmica espaço-temporal do bioma Pantanal por meio de imagens MODIS. 260 $c2008 520 $aO objetivo deste trabalho foi avaliar dados multitemporais, obtidos pelo sensor "moderate resolution imaging spectroradiometer" (MODIS), para o estudo da dinâmica espaço-temporal de duas sub-regiões do bioma Pantanal. The ojective of this work was to evaluate multitemporal data, obtained by moderate resolution imaging spectroradiometer (MODIS) sensor, for the study of spatial-temporal dynamics in two subregions of the Pantanal biome. 650 $acluster analysis 650 $aremote sensing 650 $aSensoriamento Remoto 653 $aanálise de agrupamento 653 $asérie temporal 653 $atime series 700 1 $aFREITAS, R. M. de 700 1 $aPADOVANI, C. R. 700 1 $aSHIMAUKURO, Y. E. 700 1 $aMOREIRA, M. A. 773 $tPesquisa Agropecuária Brasileira$gv.43, n.10, p.1371-1378, 2008.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Pantanal (CPAP) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|