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Registro Completo |
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
02/08/2007 |
Data da última atualização: |
08/01/2008 |
Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
Autoria: |
PAIVA, A. L. C.; FREITAS, M. S.; YAMAKI, M.; TEIXEIRA, R. B.; AGUIAR, H. N.; COSTA, C. N.; TORRES, R. A. |
Afiliação: |
A. L. C. Paiva, Universidade Federal de Viçosa; M. S. Freitas, Universidade Federal de Viçosa; M. Yamaki, Universidade Federal de Viçosa; R. B. Teixeira, Universidade Federal de Viçosa; H. N. AGUIAR, Universidade Federal de Viçosa; Cláudio Nápolis Costa, Embrapa Gado de Leite; Rodolpho de Almeida Torres, Embrapa Gado de Leite. |
Título: |
Avaliação da endogamia na Raça Holandesa no Brasil. |
Ano de publicação: |
2007 |
Fonte/Imprenta: |
In: ZOOTEC 2007 - CONGRESSO BRASILEIRO DE ZOOTECNIA, 17.; CONGRESSO INTERNACIONAL DE ZOOTECNIA, 9.; REUNIÃO NACIONAL DE ENSINO DE ZOOTECNIA, 13., 2007, Londrina. A zootecnia frente a novos desafios: anais. Londrina: UEL / ABZ, 2007. 1 CD. |
Idioma: |
Português |
Palavras-Chave: |
bovinos leiteiros - raça Holandês - melhoramento genético; Coeficiente de endogamia; tamanho efetivo; variabilidade genética. |
Thesagro: |
Melhoramento Genético Animal. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00917naa a2200241 a 4500 001 1595550 005 2008-01-08 008 2007 bl --- 0-- u #d 100 1 $aPAIVA, A. L. C. 245 $aAvaliação da endogamia na Raça Holandesa no Brasil. 260 $c2007 650 $aMelhoramento Genético Animal 653 $abovinos leiteiros - raça Holandês - melhoramento genético 653 $aCoeficiente de endogamia 653 $atamanho efetivo 653 $avariabilidade genética 700 1 $aFREITAS, M. S. 700 1 $aYAMAKI, M. 700 1 $aTEIXEIRA, R. B. 700 1 $aAGUIAR, H. N. 700 1 $aCOSTA, C. N. 700 1 $aTORRES, R. A. 773 $tIn: ZOOTEC 2007 - CONGRESSO BRASILEIRO DE ZOOTECNIA, 17.; CONGRESSO INTERNACIONAL DE ZOOTECNIA, 9.; REUNIÃO NACIONAL DE ENSINO DE ZOOTECNIA, 13., 2007, Londrina. A zootecnia frente a novos desafios: anais. Londrina: UEL / ABZ, 2007. 1 CD.
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Embrapa Gado de Leite (CNPGL) |
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Registro Completo
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
29/12/2015 |
Data da última atualização: |
25/01/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
SILVA, F. M. L.; DONEGA, M. A.; CERDEIRA, A. L.; CORNIANI, N.; VELINI, E. D.; CANTRELL, C. L.; DAYAN, F. E.; COELHO, M. N.; SHEA, K.; DUKE, S. O. |
Afiliação: |
FERDINANDO MARCOS LIMA SILVA, FCA-UNESP; MATHEUS AUGUSTO DONEGA, ESALQ-USP; ANTONIO LUIZ CERDEIRA, CNPMA; NATALIA CORNIANI, FCA-UNESP; EDIVALDO DOMINGUES VELINI, FCA-UNESP; CHARLES L CANTRELL, USDA-ARS; FRANCK E DAYAN, USDA-ARS; MARIANA E COELHO, UFF; KATRIONA SHEA, Pennsylvania State University; STEPHEN O DUKE, USDA-ARS. |
Título: |
Roots of the invasive species Carduus nutans L. and C. acanthoides L. produce large amounts of aplotaxene, a possible allelochemical. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Journal of Chemical Ecology, New York, v. 40, n. 3, p. 276-284, 2014. |
Idioma: |
Inglês |
Conteúdo: |
Abstract: The invasive thistle Carduus nutans has been reported to be allelopathic, yet no allelochemicals have been identified from the species. In a search for allelochemicals from C. nutans and the closely related invasive species C. acanthoides, bioassay-guided fractionation of roots and leaves of each species were conducted. Only dichloromethane extracts of the roots of both species contained a phytotoxin (aplotaxene, (Z,Z,Z)-heptadeca-1,8,11,14-tetraene) with sufficient total activity to potentially act as an allelochemical. Aplotaxene made up 0.44 % of the weight of greenhousegrown C. acanthoides roots (ca. 20 mM in the plant) and was not found in leaves of either species. It inhibited growth of lettuce 50%(I50) in soil at a concentration of ca. 0.5 mg g?1 of dry soil (ca. 6.5 mM in soil moisture). These values gave a total activity in soil value (molar concentration in the plant divided by the molarity required for 50 % growth inhibition in soi l = 3.08) similar to those of some established allelochemicals. The aplotaxene I50 for duckweed (Lemna paucicostata) in nutrient solution was less than 0.333 mM, and the compound caused cellular leakage of cucumber cotyledon discs in darkness and light at similar concentrations. Soil in which C. acanthoides had grown contained aplotaxene at a lower concentration than necessary for biological activity in our short-term soil bioassays, but these levels might have activity over longer periods of time and might be an underestimate of concentrations in undisturbed and/or rhizosphere soil. MenosAbstract: The invasive thistle Carduus nutans has been reported to be allelopathic, yet no allelochemicals have been identified from the species. In a search for allelochemicals from C. nutans and the closely related invasive species C. acanthoides, bioassay-guided fractionation of roots and leaves of each species were conducted. Only dichloromethane extracts of the roots of both species contained a phytotoxin (aplotaxene, (Z,Z,Z)-heptadeca-1,8,11,14-tetraene) with sufficient total activity to potentially act as an allelochemical. Aplotaxene made up 0.44 % of the weight of greenhousegrown C. acanthoides roots (ca. 20 mM in the plant) and was not found in leaves of either species. It inhibited growth of lettuce 50%(I50) in soil at a concentration of ca. 0.5 mg g?1 of dry soil (ca. 6.5 mM in soil moisture). These values gave a total activity in soil value (molar concentration in the plant divided by the molarity required for 50 % growth inhibition in soi l = 3.08) similar to those of some established allelochemicals. The aplotaxene I50 for duckweed (Lemna paucicostata) in nutrient solution was less than 0.333 mM, and the compound caused cellular leakage of cucumber cotyledon discs in darkness and light at similar concentrations. Soil in which C. acanthoides had grown contained aplotaxene at a lower concentration than necessary for biological activity in our short-term soil bioassays, but these levels might have activity over longer periods of time and might be an underestimate... Mostrar Tudo |
Palavras-Chave: |
Aplotaxene; Phytotoxin; Phytotoxina. |
Thesagro: |
Alelopatia; Erva daninha. |
Thesaurus NAL: |
Allelochemicals; Allelopathy; Carduus acanthoides; Carduus nutans. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
Marc: |
LEADER 02538naa a2200337 a 4500 001 2032640 005 2016-01-25 008 2014 bl uuuu u00u1 u #d 100 1 $aSILVA, F. M. L. 245 $aRoots of the invasive species Carduus nutans L. and C. acanthoides L. produce large amounts of aplotaxene, a possible allelochemical.$h[electronic resource] 260 $c2014 520 $aAbstract: The invasive thistle Carduus nutans has been reported to be allelopathic, yet no allelochemicals have been identified from the species. In a search for allelochemicals from C. nutans and the closely related invasive species C. acanthoides, bioassay-guided fractionation of roots and leaves of each species were conducted. Only dichloromethane extracts of the roots of both species contained a phytotoxin (aplotaxene, (Z,Z,Z)-heptadeca-1,8,11,14-tetraene) with sufficient total activity to potentially act as an allelochemical. Aplotaxene made up 0.44 % of the weight of greenhousegrown C. acanthoides roots (ca. 20 mM in the plant) and was not found in leaves of either species. It inhibited growth of lettuce 50%(I50) in soil at a concentration of ca. 0.5 mg g?1 of dry soil (ca. 6.5 mM in soil moisture). These values gave a total activity in soil value (molar concentration in the plant divided by the molarity required for 50 % growth inhibition in soi l = 3.08) similar to those of some established allelochemicals. The aplotaxene I50 for duckweed (Lemna paucicostata) in nutrient solution was less than 0.333 mM, and the compound caused cellular leakage of cucumber cotyledon discs in darkness and light at similar concentrations. Soil in which C. acanthoides had grown contained aplotaxene at a lower concentration than necessary for biological activity in our short-term soil bioassays, but these levels might have activity over longer periods of time and might be an underestimate of concentrations in undisturbed and/or rhizosphere soil. 650 $aAllelochemicals 650 $aAllelopathy 650 $aCarduus acanthoides 650 $aCarduus nutans 650 $aAlelopatia 650 $aErva daninha 653 $aAplotaxene 653 $aPhytotoxin 653 $aPhytotoxina 700 1 $aDONEGA, M. A. 700 1 $aCERDEIRA, A. L. 700 1 $aCORNIANI, N. 700 1 $aVELINI, E. D. 700 1 $aCANTRELL, C. L. 700 1 $aDAYAN, F. E. 700 1 $aCOELHO, M. N. 700 1 $aSHEA, K. 700 1 $aDUKE, S. O. 773 $tJournal of Chemical Ecology, New York$gv. 40, n. 3, p. 276-284, 2014.
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