Consulta: subjectFacets:"Wild poinsettia"
Registros recuperados: 6
Data/hora: 09/06/2024 09:32:10

Identificación de virus asociados a la nochebuena de sol (Euphorbia pulcherrima Willd. Ex Klotzch) en México.
Provedor de dados: 32
Autores: 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...
Palavras-chave: DAS-ELISA; RT-PCR; TMV; PnMV; Nochebuena de sol; Wild poinsettia; Fitopatología; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/1732

Acetolactate synthase activity in Euphorbia heterophylla resistant to ALS- and protox- inhibiting herbicides
Provedor de dados: 87
Autores: 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

A field survey of crop management practices and distribution of ALS resistant Euphorbia heterophylla in two states in southern Brazil
Provedor de dados: 87
Autores: Vidal,R.A.; Winkler,L.M.; Hernandes,G.C.; Fleck,N.G.; Merotto Jr.,A.; Trezzi,M.M.
Herbicide resistance was reported in Brazil almost ten years ago. One of the main weeds with herbicide resistance is wild poinsettia (Euphorbia heterophylla). This work evaluates the distribution of ALS-resistant E. heterophylla in two states in southern Brazil and determines the major contributing management causes for weed resistance selection in the area. E. heterophylla seeds from 148 sites located in Paraná and Rio Grande do Sul were sampled during 2001 and 2002. Farmers provided specific site data for weed control, tillage system, crop rotation and harvesting operations during previous years. ALS resistant E. heterophylla biotypes were found widely distributed in the survey area. Data analysis suggests seed dissemination is unlikely to explain the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Imazethapyr; Wild poinsettia; Herbicide mixtures.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582004000300010

Eletrolite leakage as a technique to diagnose euphorbia heterophylla biotypes resistant to ppo-inhibitors herbicides
Provedor de dados: 87
Autores: 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

Seed reserve composition and mobilization during germination and initial seedling development of Euphorbia heterophylla
Provedor de dados: 93
Autores: 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

การแข่งขันของหญ้ายางที่มีต่อข้าวฟ่าง
Provedor de dados: 106
1 table
Palavras-chave: Sorghum; Weeds; Wild poinsettia; ข้าวฟ่าง; วัชพืช; หญ้ายาง.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4396