{"id":76883,"date":"2018-03-09T23:22:20","date_gmt":"2018-03-09T23:22:20","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/mecanismos-de-resistencia-a-inhibidores-de-la-epsp-sintasa-y-accasa-en-un-biotipo-de-lolium-multiplorum-de-chile-austral\/"},"modified":"2018-03-09T23:22:20","modified_gmt":"2018-03-09T23:22:20","slug":"mecanismos-de-resistencia-a-inhibidores-de-la-epsp-sintasa-y-accasa-en-un-biotipo-de-lolium-multiplorum-de-chile-austral","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-agrarias\/mecanismos-de-resistencia-a-inhibidores-de-la-epsp-sintasa-y-accasa-en-un-biotipo-de-lolium-multiplorum-de-chile-austral\/","title":{"rendered":"Mecanismos de resistencia a inhibidores de la epsp sintasa y accasa en un biotipo de lolium multiplorum de chile austral"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Carla Michitte Paola <\/strong><\/h2>\n<p>Como resultado de la presi\u00f3n de selecci\u00f3n que la aplicaci\u00f3n de herbicidas impone a los sistemas agr\u00edcolas, se produce la aparici\u00f3n de poblaciones de malas hierbas resistentes. Glifosato de acci\u00f3n no selectiva y sistem\u00e1tica, se aplica en postemergencia de las malas hierbas. Act\u00faa alternando la bios\u00edntesis de amino\u00e1cidos arom\u00e1ticos esenciales, por inhibici\u00f3n la enzima epsp sintasa (steinrucken, 1980). Diclofop-metil un ariloxifenoxipropionato, es un graminicida cuyo modo de acci\u00f3n primario es la inhibici\u00f3n de la accasa, y en consecuencia, la s\u00edntesis de \u00e1cidos grasos (burton et al., 1989). Glifosato y diclofop-metil son dos de los herbicidas m\u00e1s utilizados en la siembra directa, donde el uso de herbicidas para el control de malas hiertas es fundamental. Esta pr\u00e1ctica es muy com\u00fan en chile. Glofosto es utilizado con \u00e9xito desde hace m\u00e1s 15 a\u00f1os en presiembra y poscosecha y diclofop-metil se aplica durante el cultivo.  sin embargo, recientemente en la ix regi\u00f3n, una poblaci\u00f3n de lolium multiflorum (vil-1), est\u00e1 siendo pobremente controlada con ambos herbicidas. Como consecuencia de su competencia con el cultivo, la p\u00e9rdidas de producci\u00f3n y los costes relativos a su control han aumentado, al ser necesaria dosis m\u00e1s altas y mayor n\u00famero de tratamientos al a\u00f1o. Los objetivos de este trabajo fueron confirmar la resistencia de vil-1 a glofosato y diclofop-metil y determinar el grado de la misma; encontrar las causas -bioqu\u00edmicas y\/o fisiol\u00f3gicas- de ambas resistencias y encontrar alternativas para el control de este biotipo. Las curvas de dosis-respuesta confirmaron la resistencia de vil-1 a ambos herbicidas, tanto al estado de pl\u00e1ntula como en el estadio de 3 a 4 hojas. La disminuci\u00f3n de la basorci\u00f3nde glifosato por parte delbiotipo resistente, junto con un cambio en el patr\u00f3n de translocaci\u00f3n del herbicida, que migra hacia zonas que no comprometen la supervivencia de la planta, parecen explicar la resistenc<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Mecanismos de resistencia a inhibidores de la epsp sintasa y accasa en un biotipo de lolium multiplorum de chile austral<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Mecanismos de resistencia a inhibidores de la epsp sintasa y accasa en un biotipo de lolium multiplorum de chile austral <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Carla Michitte Paola <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 C\u00f3rdoba<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 27\/10\/2005<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li> Prado Amian Rafael A.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 Luis Gonzalez fernandez <\/li>\n<li>Francisco Javier Romera ruiz (vocal)<\/li>\n<li> Moyano ca\u00f1ete Mar\u00eda  lourdes (vocal)<\/li>\n<li>  (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Carla Michitte Paola Como resultado de la presi\u00f3n de selecci\u00f3n que la aplicaci\u00f3n de herbicidas impone a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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