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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
02/10/2006 |
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Data da última atualização: |
07/01/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
STADNIK, M. J.; BETTIOL, W.; SAITO, M. L. |
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Afiliação: |
M. J. STADNIK, Universidade Federal de Santa Catarina; WAGNER BETTIOL, CNPMA; MARIA LUCIA SAITO, EMBRAPA MEIO AMBIENTE. |
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Título: |
Bioprospecting for plant and fungus extracts with systemic effect to control the cucumber powdery mildew. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Journal of Plant Diseases and Protection, Berne, v. 110, n. 4, p. 383-393, 2003. |
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Idioma: |
Inglês |
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Conteúdo: |
This work was aimed to select plant and fungus extracts showing systemic effect to control the cucumber powdery mildew. For that, ethanolic extracts were obtained from five basidiomycetes and 71 plant species and tested under greenhouse conditions. Cucumber plants cv. 'Safira' were sprayed with extracts at the first true leaf growth stage and inoculated with Sphaerotheca fuliginea at the second leaf growth stage. The number, diameter and sporulation rate of powdery mildew colonies were evaluated 6 days after inoculation. In an initial screening phase, the extracts of the following plants and fungi revealed some systemic effect against the powdery mildew: Aloe vera (aloe), Bidens pilosa, Ganoderma sp. (basidiomycete), Hyptis crenata, Mascagania betbamiana, Ocotea suaveolens, Oudemansiella canarii (basidiomycete), Pinus taeda (pine), Riehardia grandiflora and Vernonia polyanthes. They were compared in three other experiments and those from Oudemansiella, Ganoderma, pine needles and aloe leaves were the most efficient reducing the number of colonies on the secondary leaf by 79, 65, 30 and 21 %, respectively. Extracts from fruiting bodies of Oudemansiella and Ganoderma also decreased the diameter of colonies by 20 % as well as the sporulation rate by 45 and 70 %, respectively. While Ganoderma did not show any direct effect in vitro, the extract of Oudemansiella (60 mg fresh weight ml[-1]) reduced the germination of powdery mildew conidia at 48 h after inoculation by 71 %. Furthermore, Oudemansiella-extract strongly inhibited the mycelium growth of Cladosporium oxysporum in liquid medium. The possible modes of action of these extracts are discussed. MenosThis work was aimed to select plant and fungus extracts showing systemic effect to control the cucumber powdery mildew. For that, ethanolic extracts were obtained from five basidiomycetes and 71 plant species and tested under greenhouse conditions. Cucumber plants cv. 'Safira' were sprayed with extracts at the first true leaf growth stage and inoculated with Sphaerotheca fuliginea at the second leaf growth stage. The number, diameter and sporulation rate of powdery mildew colonies were evaluated 6 days after inoculation. In an initial screening phase, the extracts of the following plants and fungi revealed some systemic effect against the powdery mildew: Aloe vera (aloe), Bidens pilosa, Ganoderma sp. (basidiomycete), Hyptis crenata, Mascagania betbamiana, Ocotea suaveolens, Oudemansiella canarii (basidiomycete), Pinus taeda (pine), Riehardia grandiflora and Vernonia polyanthes. They were compared in three other experiments and those from Oudemansiella, Ganoderma, pine needles and aloe leaves were the most efficient reducing the number of colonies on the secondary leaf by 79, 65, 30 and 21 %, respectively. Extracts from fruiting bodies of Oudemansiella and Ganoderma also decreased the diameter of colonies by 20 % as well as the sporulation rate by 45 and 70 %, respectively. While Ganoderma did not show any direct effect in vitro, the extract of Oudemansiella (60 mg fresh weight ml[-1]) reduced the germination of powdery mildew conidia at 48 h after inoculation by 71 %. Furthe... Mostrar Tudo |
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Thesagro: |
Controle biológico; Extrato Vegetal; Pepino. |
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Categoria do assunto: |
H Saúde e Patologia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163858/1/Stadnik-Bioprospecting-6417.pdf
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Marc: |
LEADER 02253naa a2200181 a 4500
001 1015061
005 2019-01-07
008 2003 bl uuuu u00u1 u #d
100 1 $aSTADNIK, M. J.
245 $aBioprospecting for plant and fungus extracts with systemic effect to control the cucumber powdery mildew.$h[electronic resource]
260 $c2003
520 $aThis work was aimed to select plant and fungus extracts showing systemic effect to control the cucumber powdery mildew. For that, ethanolic extracts were obtained from five basidiomycetes and 71 plant species and tested under greenhouse conditions. Cucumber plants cv. 'Safira' were sprayed with extracts at the first true leaf growth stage and inoculated with Sphaerotheca fuliginea at the second leaf growth stage. The number, diameter and sporulation rate of powdery mildew colonies were evaluated 6 days after inoculation. In an initial screening phase, the extracts of the following plants and fungi revealed some systemic effect against the powdery mildew: Aloe vera (aloe), Bidens pilosa, Ganoderma sp. (basidiomycete), Hyptis crenata, Mascagania betbamiana, Ocotea suaveolens, Oudemansiella canarii (basidiomycete), Pinus taeda (pine), Riehardia grandiflora and Vernonia polyanthes. They were compared in three other experiments and those from Oudemansiella, Ganoderma, pine needles and aloe leaves were the most efficient reducing the number of colonies on the secondary leaf by 79, 65, 30 and 21 %, respectively. Extracts from fruiting bodies of Oudemansiella and Ganoderma also decreased the diameter of colonies by 20 % as well as the sporulation rate by 45 and 70 %, respectively. While Ganoderma did not show any direct effect in vitro, the extract of Oudemansiella (60 mg fresh weight ml[-1]) reduced the germination of powdery mildew conidia at 48 h after inoculation by 71 %. Furthermore, Oudemansiella-extract strongly inhibited the mycelium growth of Cladosporium oxysporum in liquid medium. The possible modes of action of these extracts are discussed.
650 $aControle biológico
650 $aExtrato Vegetal
650 $aPepino
700 1 $aBETTIOL, W.
700 1 $aSAITO, M. L.
773 $tJournal of Plant Diseases and Protection, Berne$gv. 110, n. 4, p. 383-393, 2003.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Unidades Centrais. |
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Data corrente: |
14/05/1999 |
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Data da última atualização: |
08/01/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
RANGEL, P. H. N.; GALVÃO, J. D.; SILVA, J. C. |
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Afiliação: |
PAULO HIDEO NAKANO RANGEL, CNPAF; JOSE DOMINGOS GALVÃO, UFV; JOSÉ CARLOS SILVA, UFV. |
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Título: |
Coeficientes de trilha em cultivares de arroz. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, v. 17, n. 2, p. 239-246, fev. 1982. |
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Idioma: |
Português |
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Conteúdo: |
RESUMO - Em experimento conduzido na UEPAE de Manaus, Amazonas, desdobraram-se os coeficientes de correlação genótipica em componentes de efeito direto e indireto pelo método dos coeficientes de trilha ("path coefficients"). A analise de trilha, desenvolvida sobre oito caracteres, mostrou que o ciclo da planta de arroz (Oryza sativa L.)e a percentagem de grãos cheios/panícula foram os caracteres de maior influência direta e positiva na produção de grãos/parcela. O desdobramento das correlações, envolvendo somente os componentes primários, mostrou que a produção de grãos/parcela foi consequência principalmente do numero de espiguetas/panícula e do numero de panículas/cova. Os resultados discordantes, obtidos com as duas analises, levam a concluir que, para a utilização do coeficiente de trilha, deve-se selecionar cuidadosamente os caracteres para o estudo e ter cautela no uso desta técnica. A analise de trilha dos componentes secundários sobre os primários, juntamente com as estimativas das correlações genótipicas, mostraram que o ciclo da planta e o numero de perfilhos/cova são os principais indicadores do numero de panículas/cova, enquanto o numero de espiguetas/panícula e o peso de 100 grãos são consequências principalmente do comprimento da panícula e da altura da planta, respectivamente. ABSTRACT - In an experiment conducted at UEPAE-Manaus, state of Amazonas, the path coefficient method was applied for partitioning genotypic correlation coefficients in order to determine the direct and indirect effects of the components. Path coefficient analysis using eight characters showed that days to maturiLy and percentage of filled grains/panicle of rice (Oryza sativa L.) were Lhe major characters with direct and positive influence on yield (grams/plot). The partitioning of correlation coefficients involving only primary components showed that yield of grams/plot was mainly influenced by number ef spikelets/panicle and number of panicles/hill.The divergent results obtained with Lhe two methods of analysis employed, showed that in applying path coefficienL technique, selection of the characters must be done very carefully. Path analysis of the secondary versus the primary components, together with estimations of genotypic correlations showed that days to maturity and number of tillers/hill were principal indicators of the number of panicles/hill, as well as the number ai spikelets/panicle and the 100 grain weight were primarily influenced by panicle length and planL height, respectively. MenosRESUMO - Em experimento conduzido na UEPAE de Manaus, Amazonas, desdobraram-se os coeficientes de correlação genótipica em componentes de efeito direto e indireto pelo método dos coeficientes de trilha ("path coefficients"). A analise de trilha, desenvolvida sobre oito caracteres, mostrou que o ciclo da planta de arroz (Oryza sativa L.)e a percentagem de grãos cheios/panícula foram os caracteres de maior influência direta e positiva na produção de grãos/parcela. O desdobramento das correlações, envolvendo somente os componentes primários, mostrou que a produção de grãos/parcela foi consequência principalmente do numero de espiguetas/panícula e do numero de panículas/cova. Os resultados discordantes, obtidos com as duas analises, levam a concluir que, para a utilização do coeficiente de trilha, deve-se selecionar cuidadosamente os caracteres para o estudo e ter cautela no uso desta técnica. A analise de trilha dos componentes secundários sobre os primários, juntamente com as estimativas das correlações genótipicas, mostraram que o ciclo da planta e o numero de perfilhos/cova são os principais indicadores do numero de panículas/cova, enquanto o numero de espiguetas/panícula e o peso de 100 grãos são consequências principalmente do comprimento da panícula e da altura da planta, respectivamente. ABSTRACT - In an experiment conducted at UEPAE-Manaus, state of Amazonas, the path coefficient method was applied for partitioning genotypic correlation coefficients in order to determin... Mostrar Tudo |
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Palavras-Chave: |
Panicle; Panicula; Perfilhos; Spikelets. |
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Thesagro: |
Arroz; Espigueta; Genótipo; Inflorescencia; Melhoramento Genético Vegetal; Oryza Sativa; Variedade. |
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Thesaurus NAL: |
Correlation; Cultivars; Genotype. |
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Categoria do assunto: |
--
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/219970/1/Coeficientes-trilha-cultivares-1982.pdf
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Marc: |
LEADER 03350naa a2200313 a 4500
001 1942055
005 2021-01-08
008 1982 bl uuuu u00u1 u #d
100 1 $aRANGEL, P. H. N.
245 $aCoeficientes de trilha em cultivares de arroz.
260 $c1982
520 $aRESUMO - Em experimento conduzido na UEPAE de Manaus, Amazonas, desdobraram-se os coeficientes de correlação genótipica em componentes de efeito direto e indireto pelo método dos coeficientes de trilha ("path coefficients"). A analise de trilha, desenvolvida sobre oito caracteres, mostrou que o ciclo da planta de arroz (Oryza sativa L.)e a percentagem de grãos cheios/panícula foram os caracteres de maior influência direta e positiva na produção de grãos/parcela. O desdobramento das correlações, envolvendo somente os componentes primários, mostrou que a produção de grãos/parcela foi consequência principalmente do numero de espiguetas/panícula e do numero de panículas/cova. Os resultados discordantes, obtidos com as duas analises, levam a concluir que, para a utilização do coeficiente de trilha, deve-se selecionar cuidadosamente os caracteres para o estudo e ter cautela no uso desta técnica. A analise de trilha dos componentes secundários sobre os primários, juntamente com as estimativas das correlações genótipicas, mostraram que o ciclo da planta e o numero de perfilhos/cova são os principais indicadores do numero de panículas/cova, enquanto o numero de espiguetas/panícula e o peso de 100 grãos são consequências principalmente do comprimento da panícula e da altura da planta, respectivamente. ABSTRACT - In an experiment conducted at UEPAE-Manaus, state of Amazonas, the path coefficient method was applied for partitioning genotypic correlation coefficients in order to determine the direct and indirect effects of the components. Path coefficient analysis using eight characters showed that days to maturiLy and percentage of filled grains/panicle of rice (Oryza sativa L.) were Lhe major characters with direct and positive influence on yield (grams/plot). The partitioning of correlation coefficients involving only primary components showed that yield of grams/plot was mainly influenced by number ef spikelets/panicle and number of panicles/hill.The divergent results obtained with Lhe two methods of analysis employed, showed that in applying path coefficienL technique, selection of the characters must be done very carefully. Path analysis of the secondary versus the primary components, together with estimations of genotypic correlations showed that days to maturity and number of tillers/hill were principal indicators of the number of panicles/hill, as well as the number ai spikelets/panicle and the 100 grain weight were primarily influenced by panicle length and planL height, respectively.
650 $aCorrelation
650 $aCultivars
650 $aGenotype
650 $aArroz
650 $aEspigueta
650 $aGenótipo
650 $aInflorescencia
650 $aMelhoramento Genético Vegetal
650 $aOryza Sativa
650 $aVariedade
653 $aPanicle
653 $aPanicula
653 $aPerfilhos
653 $aSpikelets
700 1 $aGALVÃO, J. D.
700 1 $aSILVA, J. C.
773 $tPesquisa Agropecuária Brasileira$gv. 17, n. 2, p. 239-246, fev. 1982.
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Embrapa Arroz e Feijão (CNPAF) |
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