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| Xavier,E.; Oliveira,M.C.; Trezzi,M.M.; Vidal,R.A.; Diesel,F.; Pagnoncelli,F.D.; Scalcon,E.. |
| The objective of this study was to determine the activity of the enzyme acetolactate synthase in biotypes of wild poinsettia (Euphorbia heterophylla) with multiple resistance to ALS- and Protox- inhibitors in the presence and absence of imazapyr, imazethapyr and nicosulfuron. We conducted in vitro assay of ALS enzyme extracted from plants of Vitorino, Bom Sucesso do Sul and Medianeira biotypes (with multiple resistance) and a susceptible population in the absence and presence of imazapyr, imazethapyr and nicosulfuron. In the absence of herbicides, biotypes with multiple resistance showed higher affinity for the substrate of the enzyme compared with the susceptible population. The herbicides imazapyr, imazethapyr and nicosulfuron had little effect on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cross resistance; Wild poinsettia; Mechanism of resistance. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000400013 |
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| Trezzi,M.M; Vidal,R.A; Kruse,N.D; Gustman,M.S; Xavier,E; Rosin,D; Dedordi,G.F. |
| The action of herbicides that affect the integrity of cell membranes and cause leakage, like PPO-inhibitors, can be detected by measuring the electric conductivity (EC) of a solution in which the plant tissue target is incubated in the presence of herbicide. The objectives of this work were to confirm PPO resistance in a new Euphorbia heterophylla (EPHHL) biotype, and to compare the electrolyte leakage from R and S to PPO-inhibitors biotypes, using two different methods of incubation in a solution containing herbicides. One experiment was carried in greenhouse and three in laboratory, with a completely randomized design. In the greenhouse experiment, four biotypes of EPHHL were sprayed with seven rates of fomesafen to confirm resistance in suspected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cell disruption; Electrical conductivity; Herbicide absorption; Resistance mechanism; Wild poinsettia. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000300020 |
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| Ocampo Ocampo, Tania. |
| El Campo Experimental “Zacatepec”, del INIFAP, inició un programa de mejoramiento genético de plantas silvestres y semicultivadas de nochebuena (“nochebuena de sol”). Dicho programa requiere de la generación de una amplia base de datos fitosanitarios que permitan la liberación permanente de nuevas variedades e híbridos con tolerancia a las principales enfermedades. En México no hay con información sobre presencia de virus en nochebuena de sol, por lo que el objetivo de la presente investigación fue generar información de los virus asociados a esta planta. La identificación de estos patógenos se realizó mediante pruebas ELISA, inmunotiras y RT-PCR; adicionalmente, se inocularon plantas indicadoras y se hizo microscopia electrónica de transmisión. Con... |
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Palavras-chave: DAS-ELISA; RT-PCR; TMV; PnMV; Nochebuena de sol; Wild poinsettia; Fitopatología; Maestría. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1732 |
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| SUDA,CECILIA N.K.; GIORGINI,JARBAS F.. |
| Seed composition and reserve mobilization were investigated in wild poinsettia (Euphorbia heterophylla L.). Lipids, around 60% of seed dry mass, are the major reserve. Proteins, including albumins (49%), salt insoluble globulins (30%), salt-soluble globulins (21%) and prolamins (0.3%), comprise about a quarter of seed dry mass. Soluble sugars comprise about 3.6% of seed dry mass, sucrose being the predominant sugar. Starch was not detected in the endosperm of E. heterophylla. Lipid depletion starts after initial imbibition, and is completed between 72 and 96 hours. Protein fractions exhibit different degradation patterns, salt-soluble globulins being continuously degraded after the start of imbibition whereas salt insoluble fractions are degraded between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weed; Wild poinsettia; Euphorbiaceae; Proteins; Lipids; Carbohydrates. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312000000300006 |
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