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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
26/04/1999 |
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Data da última atualização: |
26/04/1999 |
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Autoria: |
JAMES, E. K.; OLIVARES, F. L.; BALDANI, J. I.; DOBEREINER, Johanna. |
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Título: |
Herbaspirillum, an endophytic diazotroph colonizing vascular tissue in leaves of Sorghum bicolor L. Moench. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Journal of Experimental Botany, Oxford, v. 48, n. 308, p. 785-797, 1997. |
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Idioma: |
Inglês |
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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 |
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Palavras-Chave: |
Bacterias; BNF; Diazotrofica; Diazotrophs; Endofito; FBN; Fixação biologica de nitrogênio; Nitrogen fixing bacteria. |
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Thesagro: |
Bactéria; Folha; Xilema. |
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Thesaurus Nal: |
endophytes; Herbaspirillum rubrisubalbicans; Herbaspirillum seropedicae; leaves; xylem. |
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Categoria do assunto: |
-- |
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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.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
16/11/2018 |
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Data da última atualização: |
08/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
CALDAS, A. M.; PISSARA, T. C. T.; COSTA, R. C. A.; ROLIM NETO, F. C.; ZANATA, M.; PARAHYBA, R. da B. V.; FERNANDES, L. F. S.; PACHECO, F. A. L. |
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Afiliação: |
ANILDO MONTEIRO CALDAS, UFRPE; TERESA CRISTINA TARLÉ PISSARRA, UNESP; RENATA CRISTINA ARAÚJO COSTA, UNESP; FERNANDO CARTAXO ROLIM NETO, UFRPE; MARCELO ZANATA, INSTITUTO FLORESTAL-SP; ROBERTO DA BOA VIAGEM PARAHYBA, CNPS; LUIS FILIPE SANCHES FERNANDES, UTAD-PT; FERNANDO ANTÓNIO LEAL PACHECO, UTAD-PT. |
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Título: |
Flood vulnerability, environmental land use conflicts, and conservation of soil and water: a study in the Batatais SP municipality, Brazil. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Water, v. 10, n. 10, article 1357, 2018. |
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DOI: |
https://doi.org/10.3390/w10101357 |
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Idioma: |
Inglês |
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Conteúdo: |
In many regions across the planet, flood events are now more frequent and intense because of climate change and improper land use, resulting in risks to the population. However, the procedures to accurately determine the areas at risk in regions influenced by inadequate land uses are still inefficient. In rural watersheds, inadequate uses occur when actual uses deviate from land capability, and are termed environmental land use conflicts. To overcome the difficulty to evaluate flood vulnerability under these settings, in this study a method was developed to delineate flood vulnerability areas in a land use conflict landscape: the Batatais municipality, located in the State of São Paulo, Brazil. The method and its implementation resorted to remote sensed data, geographic information systems and geo-processing. Satellite images and their processing provided data for environmental factors such as altitude, land use, slope, and soil class in the study area. The importance of each factor for flood vulnerability was evaluated through the analytical hierarchy process (AHP). According to the results, vast areas of medium to high flood vulnerability are located in agricultural lands affected by environmental land use conflicts. In these areas, amplified flood intensities, soil erosion, crop productivity loss and stream water deterioration are expected. The coverage of Batatais SP municipality by these vulnerable areas is so extensive (60%) that preventive and recovery measures were proposed in the context of a land consolidation-water management plan aiming flood control and soil and water conservation. MenosIn many regions across the planet, flood events are now more frequent and intense because of climate change and improper land use, resulting in risks to the population. However, the procedures to accurately determine the areas at risk in regions influenced by inadequate land uses are still inefficient. In rural watersheds, inadequate uses occur when actual uses deviate from land capability, and are termed environmental land use conflicts. To overcome the difficulty to evaluate flood vulnerability under these settings, in this study a method was developed to delineate flood vulnerability areas in a land use conflict landscape: the Batatais municipality, located in the State of São Paulo, Brazil. The method and its implementation resorted to remote sensed data, geographic information systems and geo-processing. Satellite images and their processing provided data for environmental factors such as altitude, land use, slope, and soil class in the study area. The importance of each factor for flood vulnerability was evaluated through the analytical hierarchy process (AHP). According to the results, vast areas of medium to high flood vulnerability are located in agricultural lands affected by environmental land use conflicts. In these areas, amplified flood intensities, soil erosion, crop productivity loss and stream water deterioration are expected. The coverage of Batatais SP municipality by these vulnerable areas is so extensive (60%) that preventive and recovery measures were p... Mostrar Tudo |
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Thesagro: |
Conservação do Solo; Inundação; Manejo de Água; Método de Análise; Sistema de Informação Geográfica; Uso da Terra. |
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Thesaurus NAL: |
Flood control; Geographic information systems; Land use; Soil conservation; Spatial data; Water management. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/186126/1/2018-043.pdf
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Marc: |
LEADER 02751naa a2200361 a 4500
001 2099494
005 2021-10-08
008 2018 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3390/w10101357$2DOI
100 1 $aCALDAS, A. M.
245 $aFlood vulnerability, environmental land use conflicts, and conservation of soil and water$ba study in the Batatais SP municipality, Brazil.$h[electronic resource]
260 $c2018
520 $aIn many regions across the planet, flood events are now more frequent and intense because of climate change and improper land use, resulting in risks to the population. However, the procedures to accurately determine the areas at risk in regions influenced by inadequate land uses are still inefficient. In rural watersheds, inadequate uses occur when actual uses deviate from land capability, and are termed environmental land use conflicts. To overcome the difficulty to evaluate flood vulnerability under these settings, in this study a method was developed to delineate flood vulnerability areas in a land use conflict landscape: the Batatais municipality, located in the State of São Paulo, Brazil. The method and its implementation resorted to remote sensed data, geographic information systems and geo-processing. Satellite images and their processing provided data for environmental factors such as altitude, land use, slope, and soil class in the study area. The importance of each factor for flood vulnerability was evaluated through the analytical hierarchy process (AHP). According to the results, vast areas of medium to high flood vulnerability are located in agricultural lands affected by environmental land use conflicts. In these areas, amplified flood intensities, soil erosion, crop productivity loss and stream water deterioration are expected. The coverage of Batatais SP municipality by these vulnerable areas is so extensive (60%) that preventive and recovery measures were proposed in the context of a land consolidation-water management plan aiming flood control and soil and water conservation.
650 $aFlood control
650 $aGeographic information systems
650 $aLand use
650 $aSoil conservation
650 $aSpatial data
650 $aWater management
650 $aConservação do Solo
650 $aInundação
650 $aManejo de Água
650 $aMétodo de Análise
650 $aSistema de Informação Geográfica
650 $aUso da Terra
700 1 $aPISSARA, T. C. T.
700 1 $aCOSTA, R. C. A.
700 1 $aROLIM NETO, F. C.
700 1 $aZANATA, M.
700 1 $aPARAHYBA, R. da B. V.
700 1 $aFERNANDES, L. F. S.
700 1 $aPACHECO, F. A. L.
773 $tWater$gv. 10, n. 10, article 1357, 2018.
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