| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Trigo. Para informações adicionais entre em contato com cnpt.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Trigo. |
|
Data corrente: |
10/01/2010 |
|
Data da última atualização: |
05/09/2012 |
|
Autoria: |
WILKINSON, R. E. |
|
Título: |
Carotenogenic inhibition by Norflurazon in wheat. |
|
Ano de publicação: |
1985 |
|
Fonte/Imprenta: |
Pesticide Biochemistry and Physiology, v. 23, n. 3, p. 370-377, 1985. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Wheat (Triticum aestivum L. cv Holley) seedlings were exposed to [N-14CH3]norflurazonin nutrient solution studies. The 14CH3 group was incorporated into a compound eluting on GLC at a relative retention temperature Rf equivalent to n-C21 H36 and mass spectrometry validated a 295 MW. The concentration of [N-14CH3]norflurazon and/or Rl[14C]norflurazon which resulted in carotenogenesis inhibition was 0.07 ?Min the water contained in the leaves. The concentration of norflurazon required for phytoene accumulation as a mode-of-action was ca. 140 × the concentration of norflurazon required for geranylgeraniol accumulation. Geranylgeraniol accumulated at 1 ppbw (3.2 nM) norflurazon and phytofluene accumulated throughout the norflurazon concentration series (1 to 1000 ppbw). Carotene content was increased by 1 to 16 ppbw norflurazon but was decreased by 64 ppbw norflurazon. Thus, two modes-of-activity for norflurazon are documented that depend upon concentration of the toxicant in the tissue. Norflurazon demethylation in prephytoenepyrophosphate synthesis resulted in a C21 conjugate and increased concentrations of GGPP and phytoene in the tissue. At approximately 31 ppbw norflurazon, an inhibition of phytoene dehydrogenation occurred and phytoene accumulated. At 62 ppbw norflurazon, phytofluene hydrogenation inhibition occurred and phytofluene accumulated while ?-carotene synthesis was inhibited. These inhibitions may possibly be reversible when substrate concentrations are in excess. |
|
Thesagro: |
Caroteno; Trigo. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01893naa a2200145 a 4500
001 1836565
005 2012-09-05
008 1985 bl --- 0-- u #d
100 1 $aWILKINSON, R. E.
245 $aCarotenogenic inhibition by Norflurazon in wheat.
260 $c1985
520 $aWheat (Triticum aestivum L. cv Holley) seedlings were exposed to [N-14CH3]norflurazonin nutrient solution studies. The 14CH3 group was incorporated into a compound eluting on GLC at a relative retention temperature Rf equivalent to n-C21 H36 and mass spectrometry validated a 295 MW. The concentration of [N-14CH3]norflurazon and/or Rl[14C]norflurazon which resulted in carotenogenesis inhibition was 0.07 ?Min the water contained in the leaves. The concentration of norflurazon required for phytoene accumulation as a mode-of-action was ca. 140 × the concentration of norflurazon required for geranylgeraniol accumulation. Geranylgeraniol accumulated at 1 ppbw (3.2 nM) norflurazon and phytofluene accumulated throughout the norflurazon concentration series (1 to 1000 ppbw). Carotene content was increased by 1 to 16 ppbw norflurazon but was decreased by 64 ppbw norflurazon. Thus, two modes-of-activity for norflurazon are documented that depend upon concentration of the toxicant in the tissue. Norflurazon demethylation in prephytoenepyrophosphate synthesis resulted in a C21 conjugate and increased concentrations of GGPP and phytoene in the tissue. At approximately 31 ppbw norflurazon, an inhibition of phytoene dehydrogenation occurred and phytoene accumulated. At 62 ppbw norflurazon, phytofluene hydrogenation inhibition occurred and phytofluene accumulated while ?-carotene synthesis was inhibited. These inhibitions may possibly be reversible when substrate concentrations are in excess.
650 $aCaroteno
650 $aTrigo
773 $tPesticide Biochemistry and Physiology$gv. 23, n. 3, p. 370-377, 1985.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Trigo (CNPT) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 16 | |
| 11. |  | GUERRERO, F. D.; CAMERON, C.; FOIL, L. D.; BARROS, A. T. M. de; CROW, J.; RETZEL, E. Molecular sequence dataset to identify metabolic-based pyrethroid resistance in the horn fly, Haematobia irritans. In: CONGRESSO BRASILEIRO DE PARASITOLOGIA VETERINÁRIA, 17., 2012, São Luis. Parasitologia veterinária, bem estar e produção animal: anais. São Luis: Colégio Brasileiro de Parasitologia Veterinária, 2012. Resumo: PA 149. p. 193| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
|   |
| 12. | | BARROS, A. T. M. de; GOMES, A.; KOLLER, W. W.; FOIL, L. D.; ISMAEL, A. P. K. Resistencia da mosca-dos-chifres (Diptera: Muscidae) a cipermetrina no Mato Grosso e Mato Grosso do Sul. In: CONGRESSO BRASILEIRO DE PARASITOLOGIA VETERINARIA, 12.,; SEMINARIO DE PARASITOSES NA CLINICA DE PEQUENOS ANIMAIS, 1.,; SEMINARIO DE COCCIDIOS E COCCIDIOSES, 1; SEMINARIO DE MANEJO INTEGRADO DA RESISTENCIA, 1.; CURSO DE GEOPROCESSAMENTO E SEU USO EM ESTUDOS EPIDEMIOLOGICOS, 2002, Rio de Janeiro [Anais...] Rio de Janeiro: UFRRJ: Colegio Brasileiro de Parasitologia Veterinaria, 2002. CD-Rom.| Biblioteca(s): Embrapa Pantanal. |
| |
| 14. | | BRITO, L. G.; OLIVEIRA, M. C. de S.; FOIL, L. D.; GUERRERO, F. D.; LEON, A. P. de; BARBIERI, F. da S.; CHAGAS, A. C. de S.; BARROS, A. T. M. de. Characterization of pesticede resistance in horn fly populations as a risk for fixation fo restance alles in cattle tick population. In: SIMPÓSIO EMBRAPA LABEX EUA DE SANIDADE ANIMAL, 2., 2012, Brasília, DF. Anais... Brasília: Embrapa Estudos e Capacitação, 2012. p.129-130| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
|  |
| 15. | | BRITO, L. G.; OLIVEIRA, M. C. de S.; FOIL, L. D.; GUERRERO, F. D.; PEREZ DE LEON, A.; BARBIERI, F. da S.; CHAGAS, A. C. de S.; BARROS, A. T. M. de. Characterization of pesticide in horn fly populations as a risk factor for fixation of resistance alleles in cattle tick populations. In: SIMPÓSIO EMBRAPA LABEX EUA DE SANIDADE ANIMAL, 2., Brasília, 2012. Proceedings... Brasília: Embrapa Estudos e Capacitação, 2012. p. 129| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
| |
| 16. | | BRITO, L. G.; OLIVEIRA, M. C. de S.; FOIL, L. D.; PEREZ DE LEON, A.; BARBIERI, F. da S.; CHAGAS, A. C. de S.; BARROS, A. T. M. de. Characterization of pesticide resistance in horn fly populations as a risk fator for fixation of resistance alleles in cattle tick populations. In: SIMPÓSIO EMBRAPA LABEX EUA DE SANIDADE ANIMAL, 2., Brasília, 2012. Proceedings... Brasília, DF: Embrapa Estudos e Capacitação, 2012. p. 129.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Rondônia. |
| |
| Registros recuperados : 16 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
