| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
|
Data corrente: |
02/12/2020 |
|
Data da última atualização: |
18/05/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
RAIOL-JUNIOR, L. L.; CIFUENTES-ARENAS, J. C.; CARVALHO, E. V. de; GIRARDI, E. A.; LOPES, S. A. |
|
Afiliação: |
LAUDECIR L. RAIOL-JUNIOR, Fundecitrus; JUAN C. CIFUENTES-ARENAS, Fundecitrus; EVERTON V. DE CARVALHO, UNESP; EDUARDO AUGUSTO GIRARDI, CNPMF; SILVIO A. LOPES, Fundecitrus. |
|
Título: |
Evidence that 'Candidatus Liberibacter Asiaticus' moves predominantly toward new tissue growth in citrus plants. |
|
Ano de publicação: |
2021 |
|
Fonte/Imprenta: |
Plant Disease, v.105, p.34-42, 2021. |
|
ISSN: |
0191-2917 |
|
DOI: |
https://doi.org/10.1094/PDIS-01-20-0158-R |
|
Idioma: |
Inglês |
|
Conteúdo: |
?Candidatus Liberibacter asiaticus? (Las) is an unculturable, phloem-limited, insect-transmitted bacterium associated with the Asiatic form of huanglongbing (HLB), the most destructive citrus disease. In Asia and the Americas, it is transmitted by the Asian citrus psyllid (Diaphorina citri Kuwavama). Despite considerable research, little is known about the processes involved in plant infection and colonization by Las. This study was conducted to determine whether the basal portion (below girdling) of the plant is an important route for Las to move laterally from a point of inoculation on a branch to pathogen-free branches elsewhere in the canopy, and to quantify the influence of actively growing tissues on vertical upward (acropetally) or downward (basipetally) movement of Las. Nongirdled and fully or partially girdled stems of potted plants of ?Pera? sweet orange, graft-inoculated above or below girdling, were sampled in distinct regions and assessed by qPCR, 6 months postinoculation. Las invaded all regions of partially and nongirdled plants but remained restricted to the inoculated regions of fully girdled plants, evidence that in planta bacterium movement is limited to the phloem. In fully girdled plants, starch accumulated above the girdling site, probably because of changes in flow of phloem sap. To study the influence of actively growing tissues, inoculated ?Valencia? sweet orange plants were kept intact or were top- or root-pruned to force production of new tissues, and sampled at 15-day intervals. Las migrated rapidly and most predominantly toward newly developing root and leaf tissues. The rapid and predominant movement of Las to newly developed shoots and roots would explain failures of canopy heat treatments and pruning to cure HLB-affected trees, and reinforces the need to protect rapidly growing new shoots from feeding by D. citri in order to minimize transmission and spread of the pathogen by the vector within and between orchards. Menos?Candidatus Liberibacter asiaticus? (Las) is an unculturable, phloem-limited, insect-transmitted bacterium associated with the Asiatic form of huanglongbing (HLB), the most destructive citrus disease. In Asia and the Americas, it is transmitted by the Asian citrus psyllid (Diaphorina citri Kuwavama). Despite considerable research, little is known about the processes involved in plant infection and colonization by Las. This study was conducted to determine whether the basal portion (below girdling) of the plant is an important route for Las to move laterally from a point of inoculation on a branch to pathogen-free branches elsewhere in the canopy, and to quantify the influence of actively growing tissues on vertical upward (acropetally) or downward (basipetally) movement of Las. Nongirdled and fully or partially girdled stems of potted plants of ?Pera? sweet orange, graft-inoculated above or below girdling, were sampled in distinct regions and assessed by qPCR, 6 months postinoculation. Las invaded all regions of partially and nongirdled plants but remained restricted to the inoculated regions of fully girdled plants, evidence that in planta bacterium movement is limited to the phloem. In fully girdled plants, starch accumulated above the girdling site, probably because of changes in flow of phloem sap. To study the influence of actively growing tissues, inoculated ?Valencia? sweet orange plants were kept intact or were top- or root-pruned to force production of new tissues, ... Mostrar Tudo |
|
Thesagro: |
Doença de Planta; Fruta Cítrica. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02670naa a2200217 a 4500
001 2127478
005 2023-05-18
008 2021 bl uuuu u00u1 u #d
022 $a0191-2917
024 7 $ahttps://doi.org/10.1094/PDIS-01-20-0158-R$2DOI
100 1 $aRAIOL-JUNIOR, L. L.
245 $aEvidence that 'Candidatus Liberibacter Asiaticus' moves predominantly toward new tissue growth in citrus plants.$h[electronic resource]
260 $c2021
520 $a?Candidatus Liberibacter asiaticus? (Las) is an unculturable, phloem-limited, insect-transmitted bacterium associated with the Asiatic form of huanglongbing (HLB), the most destructive citrus disease. In Asia and the Americas, it is transmitted by the Asian citrus psyllid (Diaphorina citri Kuwavama). Despite considerable research, little is known about the processes involved in plant infection and colonization by Las. This study was conducted to determine whether the basal portion (below girdling) of the plant is an important route for Las to move laterally from a point of inoculation on a branch to pathogen-free branches elsewhere in the canopy, and to quantify the influence of actively growing tissues on vertical upward (acropetally) or downward (basipetally) movement of Las. Nongirdled and fully or partially girdled stems of potted plants of ?Pera? sweet orange, graft-inoculated above or below girdling, were sampled in distinct regions and assessed by qPCR, 6 months postinoculation. Las invaded all regions of partially and nongirdled plants but remained restricted to the inoculated regions of fully girdled plants, evidence that in planta bacterium movement is limited to the phloem. In fully girdled plants, starch accumulated above the girdling site, probably because of changes in flow of phloem sap. To study the influence of actively growing tissues, inoculated ?Valencia? sweet orange plants were kept intact or were top- or root-pruned to force production of new tissues, and sampled at 15-day intervals. Las migrated rapidly and most predominantly toward newly developing root and leaf tissues. The rapid and predominant movement of Las to newly developed shoots and roots would explain failures of canopy heat treatments and pruning to cure HLB-affected trees, and reinforces the need to protect rapidly growing new shoots from feeding by D. citri in order to minimize transmission and spread of the pathogen by the vector within and between orchards.
650 $aDoença de Planta
650 $aFruta Cítrica
700 1 $aCIFUENTES-ARENAS, J. C.
700 1 $aCARVALHO, E. V. de
700 1 $aGIRARDI, E. A.
700 1 $aLOPES, S. A.
773 $tPlant Disease$gv.105, p.34-42, 2021.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Cerrados. |
|
Data corrente: |
28/10/2004 |
|
Data da última atualização: |
28/10/2009 |
|
Autoria: |
RIBEIRO, J. F.; FELFILI, J. M.; WALTER, B. M. T.; MENDONÇA, R. C. de; FILGUEIRAS, T. S.; SILVA, M. R. da. |
|
Título: |
Caracterização florística e potencial de uso das espécies vasculares ocorrentes nas fazendas Trijunção, BA. |
|
Ano de publicação: |
2001 |
|
Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2001. |
|
Páginas: |
48 p. |
|
Série: |
(Embrapa Cerrados. Documentos, 46). |
|
Idioma: |
Português |
|
Conteúdo: |
ABSTRACT: Proper management of natural areas requires phisical (soil, climate and topography) and biological (fauna, flora and microorganisms) characterization. Such information is extremaly useful for management plans of conservation unit such as National Parks, Extractive Reserves of Natural Resources Reserve (RPPN). This study aimed characterize floristic and phytosociological aspects of the microregion of the Trijuncao Farms. The main phytophysiognomies were evaluated in order to select species with economical potential. The phytofionomics of Mata de Galeria Inundavel (swamped gallery forest), Cerradão, Cerrado, Vereda, Campo Sujo and Campo Limpo, and also Carrasco, a typical vegetation of the transition between Cerrado and Caatinga biome were identified. In the studied are it 478 plant especies were found. This figure represents almost 38% of the flora of the region and at least 7% of the flora of all the Cerrado biome. The most representative botanical family was leguminosae with 53 species. Also, the area presented 125 species with some kind economic potential . A list with each one of these species is presented with vernacular name and possible uses. Althrough preliminary, these are important and show the intense diversity of the Cerrado flora and the significance of its utilization in sustainable manner. |
|
Palavras-Chave: |
Bahia; Brasil; Fazenda Trijunção; Fitossociologia; Use; Uso; Zoneamento. |
|
Thesagro: |
Biodiversidade; Botânica; Cerrado; Flora; Recurso Natural. |
|
Thesaurus NAL: |
biodiversity; Brazil; natural resources; zoning. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAC-2009/25015/1/doc_46.pdf
|
|
Marc: |
LEADER 02354nam a2200385 a 4500
001 1568026
005 2009-10-28
008 2001 bl uuuu u0uu1 u #d
100 1 $aRIBEIRO, J. F.
245 $aCaracterização florística e potencial de uso das espécies vasculares ocorrentes nas fazendas Trijunção, BA.
260 $aPlanaltina, DF: Embrapa Cerrados$c2001
300 $a48 p.
490 $a(Embrapa Cerrados. Documentos, 46).
520 $aABSTRACT: Proper management of natural areas requires phisical (soil, climate and topography) and biological (fauna, flora and microorganisms) characterization. Such information is extremaly useful for management plans of conservation unit such as National Parks, Extractive Reserves of Natural Resources Reserve (RPPN). This study aimed characterize floristic and phytosociological aspects of the microregion of the Trijuncao Farms. The main phytophysiognomies were evaluated in order to select species with economical potential. The phytofionomics of Mata de Galeria Inundavel (swamped gallery forest), Cerradão, Cerrado, Vereda, Campo Sujo and Campo Limpo, and also Carrasco, a typical vegetation of the transition between Cerrado and Caatinga biome were identified. In the studied are it 478 plant especies were found. This figure represents almost 38% of the flora of the region and at least 7% of the flora of all the Cerrado biome. The most representative botanical family was leguminosae with 53 species. Also, the area presented 125 species with some kind economic potential . A list with each one of these species is presented with vernacular name and possible uses. Althrough preliminary, these are important and show the intense diversity of the Cerrado flora and the significance of its utilization in sustainable manner.
650 $abiodiversity
650 $aBrazil
650 $anatural resources
650 $azoning
650 $aBiodiversidade
650 $aBotânica
650 $aCerrado
650 $aFlora
650 $aRecurso Natural
653 $aBahia
653 $aBrasil
653 $aFazenda Trijunção
653 $aFitossociologia
653 $aUse
653 $aUso
653 $aZoneamento
700 1 $aFELFILI, J. M.
700 1 $aWALTER, B. M. T.
700 1 $aMENDONÇA, R. C. de
700 1 $aFILGUEIRAS, T. S.
700 1 $aSILVA, M. R. da
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
