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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
06/04/2004 |
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Data da última atualização: |
27/07/2007 |
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Autoria: |
ALMEIDA, A. M. R.; MARIN, S. R. R.; BINNECK, E.; PIUGA, F. F.; SARTORI, F.; COSTAMILAN, L. M.; TEIXEIRA, M. R. O.; LOPES. |
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Título: |
Pathogenicity, molecular analysis, and cercosporin content of brazilian isolates of Cercospora kikuchii. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
In: WORLD SOYBEAN RESEARCH CONFERENCE, 7.; INTERNATIONAL SOYBEAN PROCESSING AND UTILIZATION CONFERENCE, 4.; CONGRESSO BRASILEIRO DE SOJA, 3., 2004, Foz do Iguassu. Abstracts of contributed papers and posters. Londrina: Embrapa Soybean, 2004. |
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Páginas: |
p. 69-70. |
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Série: |
(Embrapa Soja. Documentos, 228). |
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Idioma: |
Inglês |
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Notas: |
Editado por Flávio Moscardi, Clara Beatriz Hoffmann-Campo, Odilon Ferreira Saraiva, Paulo Roberto Galerani, Francisco Carlos Krzyzanowski, Mercedes Concordia Carrão-Panizzi. |
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Conteúdo: |
The fungus Cercospora kikuchii is involved in defoliation of soybean plants, and is normally associated with Septoria glycines in late season. No genetic resistance has been described. The screening of resistant genotypes requires previous knowledge of the fungus. This work was undertaken to evaluate pathogenic and genetic diversity among isolates of Cercospora kikuchii from different areas of Brazil. Seventy-two isolates obtained from purple stained seeds showed differences in phenotypic variation. Comments from the literature associated other Cercospora spp. with purple stain, indistinguishable from those produced by C. kikuchii. Moreover, cercosporin content and rate of colony development was higly variable among isolates. A strong correlation was found between cercosporin content and virulence. Genetic differentiation among and within populations was observed based on 86 RAPD loci. RAPD analysis permitted clustering all isolates into 6 groups. No relationship was identified between isolates and geographic origin or cercosporin content. The sequences of the intergenic spacer region (ITS1-5.8S-ITS2) from 14 isolates chosen according to the previous clustering analysis, were determined by the dideoxy chain-termination method and the chromatograms basecalled by PHRED. High quality sequence fragments (PHRED score >20) showed high similarities to the GenBank accession no. AF291708 sequence, proving that all isolates used belong to the species C. kikuchii. It is clear from this work that populations of C. kikuchii are pathogenically, genotypically and geographically variable. Moreover, C. kikuchii has great phenotypic variation and cercosporin could be a good parameter for choosing a good isolate for screening resistant or tolerant cultivars. Considering that this pathogen is easily transmitted by seeds it is not surprise to find the same haplotypes in different regions. Migration could be favoured by infected seeds as demonstrated by the clustering analysis. MenosThe fungus Cercospora kikuchii is involved in defoliation of soybean plants, and is normally associated with Septoria glycines in late season. No genetic resistance has been described. The screening of resistant genotypes requires previous knowledge of the fungus. This work was undertaken to evaluate pathogenic and genetic diversity among isolates of Cercospora kikuchii from different areas of Brazil. Seventy-two isolates obtained from purple stained seeds showed differences in phenotypic variation. Comments from the literature associated other Cercospora spp. with purple stain, indistinguishable from those produced by C. kikuchii. Moreover, cercosporin content and rate of colony development was higly variable among isolates. A strong correlation was found between cercosporin content and virulence. Genetic differentiation among and within populations was observed based on 86 RAPD loci. RAPD analysis permitted clustering all isolates into 6 groups. No relationship was identified between isolates and geographic origin or cercosporin content. The sequences of the intergenic spacer region (ITS1-5.8S-ITS2) from 14 isolates chosen according to the previous clustering analysis, were determined by the dideoxy chain-termination method and the chromatograms basecalled by PHRED. High quality sequence fragments (PHRED score >20) showed high similarities to the GenBank accession no. AF291708 sequence, proving that all isolates used belong to the species C. kikuchii. It is clear from this... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 03041naa a2200241 a 4500
001 1466751
005 2007-07-27
008 2004 bl uuuu u00u1 u #d
100 1 $aALMEIDA, A. M. R.
245 $aPathogenicity, molecular analysis, and cercosporin content of brazilian isolates of Cercospora kikuchii.
260 $c2004
300 $ap. 69-70.
490 $a(Embrapa Soja. Documentos, 228).
500 $aEditado por Flávio Moscardi, Clara Beatriz Hoffmann-Campo, Odilon Ferreira Saraiva, Paulo Roberto Galerani, Francisco Carlos Krzyzanowski, Mercedes Concordia Carrão-Panizzi.
520 $aThe fungus Cercospora kikuchii is involved in defoliation of soybean plants, and is normally associated with Septoria glycines in late season. No genetic resistance has been described. The screening of resistant genotypes requires previous knowledge of the fungus. This work was undertaken to evaluate pathogenic and genetic diversity among isolates of Cercospora kikuchii from different areas of Brazil. Seventy-two isolates obtained from purple stained seeds showed differences in phenotypic variation. Comments from the literature associated other Cercospora spp. with purple stain, indistinguishable from those produced by C. kikuchii. Moreover, cercosporin content and rate of colony development was higly variable among isolates. A strong correlation was found between cercosporin content and virulence. Genetic differentiation among and within populations was observed based on 86 RAPD loci. RAPD analysis permitted clustering all isolates into 6 groups. No relationship was identified between isolates and geographic origin or cercosporin content. The sequences of the intergenic spacer region (ITS1-5.8S-ITS2) from 14 isolates chosen according to the previous clustering analysis, were determined by the dideoxy chain-termination method and the chromatograms basecalled by PHRED. High quality sequence fragments (PHRED score >20) showed high similarities to the GenBank accession no. AF291708 sequence, proving that all isolates used belong to the species C. kikuchii. It is clear from this work that populations of C. kikuchii are pathogenically, genotypically and geographically variable. Moreover, C. kikuchii has great phenotypic variation and cercosporin could be a good parameter for choosing a good isolate for screening resistant or tolerant cultivars. Considering that this pathogen is easily transmitted by seeds it is not surprise to find the same haplotypes in different regions. Migration could be favoured by infected seeds as demonstrated by the clustering analysis.
700 1 $aMARIN, S. R. R.
700 1 $aBINNECK, E.
700 1 $aPIUGA, F. F.
700 1 $aSARTORI, F.
700 1 $aCOSTAMILAN, L. M.
700 1 $aTEIXEIRA, M. R. O.
700 1 $aLOPES.
773 $tIn: WORLD SOYBEAN RESEARCH CONFERENCE, 7.; INTERNATIONAL SOYBEAN PROCESSING AND UTILIZATION CONFERENCE, 4.; CONGRESSO BRASILEIRO DE SOJA, 3., 2004, Foz do Iguassu. Abstracts of contributed papers and posters. Londrina: Embrapa Soybean, 2004.
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Registro original: |
Embrapa Soja (CNPSO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
02/05/2016 |
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Data da última atualização: |
30/05/2017 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
MAIO, A. M. D. de. |
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Afiliação: |
ANA MARIA DANTAS DE MAIO, CPAP. |
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Título: |
Jornalismo agropecuário: do êxodo da grande mídia à sobrevivência no jornal local sob o comando das assessorias. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: SANTOS, M. dos.; BUENO, W. da C. Jornalismo especializado no Brasil: teoria, prática e ensino. São Bernardo do Campo : Universidade Metodista de São Paulo, 2015. |
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Páginas: |
p. 9-30. |
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Idioma: |
Português |
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Conteúdo: |
A proposta deste artigo é avaliar as circunstâncias em que esses conteúdos são produzidos, por meio de um mapeamento da autoria deles: seriam os próprios jornalistas de redação os responsáveis pelos textos publicados? Ou os releases, preparados pelas assessorias de comunicação, estariam reinando no mundo agro? Quem, afinal, elabora conteúdos de jornalismo agropecuário propagado por sites de notícias das regiões Centro-Oeste e Sudeste do Brasil? A resposta pode servir de indicador para a tendência do jornalismo agro no país. |
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Palavras-Chave: |
Análise de discurso; Communication. |
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Thesagro: |
Comunicação; Jornalismo. |
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Thesaurus NAL: |
Mass media. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/142693/1/ANA.pdf
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Marc: |
LEADER 01257naa a2200193 a 4500
001 2044285
005 2017-05-30
008 2015 bl uuuu u00u1 u #d
100 1 $aMAIO, A. M. D. de
245 $aJornalismo agropecuário$bdo êxodo da grande mídia à sobrevivência no jornal local sob o comando das assessorias.$h[electronic resource]
260 $c2015
300 $ap. 9-30.
520 $aA proposta deste artigo é avaliar as circunstâncias em que esses conteúdos são produzidos, por meio de um mapeamento da autoria deles: seriam os próprios jornalistas de redação os responsáveis pelos textos publicados? Ou os releases, preparados pelas assessorias de comunicação, estariam reinando no mundo agro? Quem, afinal, elabora conteúdos de jornalismo agropecuário propagado por sites de notícias das regiões Centro-Oeste e Sudeste do Brasil? A resposta pode servir de indicador para a tendência do jornalismo agro no país.
650 $aMass media
650 $aComunicação
650 $aJornalismo
653 $aAnálise de discurso
653 $aCommunication
773 $tIn: SANTOS, M. dos.; BUENO, W. da C. Jornalismo especializado no Brasil: teoria, prática e ensino. São Bernardo do Campo : Universidade Metodista de São Paulo, 2015.
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Embrapa Pantanal (CPAP) |
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