{"id":22290,"date":"2018-03-09T09:12:23","date_gmt":"2018-03-09T09:12:23","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/mecanismo-de-resistencia-a-herbicidas-inhibidores-de-la-acetolactato-sintasa-als-en-biotipos-de-malas-hierbas\/"},"modified":"2018-03-09T09:12:23","modified_gmt":"2018-03-09T09:12:23","slug":"mecanismo-de-resistencia-a-herbicidas-inhibidores-de-la-acetolactato-sintasa-als-en-biotipos-de-malas-hierbas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-agrarias\/mecanismo-de-resistencia-a-herbicidas-inhibidores-de-la-acetolactato-sintasa-als-en-biotipos-de-malas-hierbas\/","title":{"rendered":"Mecanismo de resistencia a herbicidas inhibidores de la acetolactato sintasa (als) en biotipos de malas hierbas"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Mar\u00eda  Dolores Osuna Ruiz <\/strong><\/h2>\n<p>La resistencia a herbicidas constituye uno de los aspectos m\u00e1s importantes relacionados con las malas hierbas y su control qu\u00edmico. En el caso de los herbicidas inhibidores de la acetolactato sintasa (als), este es el grupo en el que se conocen m\u00e1s casos de resistencia en la actualidad.  de las cuatro especies de malas hierbas estudiadas en este trabajo, tres (amaranthus quitensis, cyperus difformis y echinochloa phyllopogon) afectan a cultivos importantes, soja y arroz respectivamente; la otra mala hierba estudiada, conyza alvida, es el primer caso de resistencia a herbicidas inhibidores de la als encontrada en esta especie a nivel mundial. Los objetivos espec\u00edficos de este trabajo fueron:  1,- confirmar el car\u00e1cter resistente a herbicidas inhibidores de la als en las poblaciones anteriormente citadas que escapaban al control por dichos herbicidas, realizando tratamientos con herbicidas bajo condiciones controladas en c\u00e1mara de crecimiento.  2,- para aquellos biotipos en los que se confirm\u00f3 el fenotipo resistente, estudiar los posibles mecanismos responsable\/s de la resistencia, incluyendo tanto estudios de absorci\u00f3n, translocaci\u00f3n y metabolismo del herbicida, como estudios del sitio de acci\u00f3n de herbicida (als) a nivel de actividad enzim\u00e1tica y a nivel de secuencia del gen.  los resultados confirmaron la resistencia a esta familia de herbicidas sospechada para los distintos biotipos, as\u00ed como la presencia de resistencia cruzada.  los ensayos de absorci\u00f3n, translocaci\u00f3n y metabolismo descartaron estos mecanismos como responsables de la existencia. Los estudios in vitro de la actividad als realizados con extractos procedentes de las distintas especies, indicaron que la resistencia encontrada a herbicidas inhibidores de la als en c.Albida, c.Difformis y a.Quitensis pod\u00eda asociarse a cambios en el enzima (als). La secuencia del gen de la als de plantas de a.Quitensis revel\u00f3 la existencia de mutaciones puntuales en los d<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Mecanismo de resistencia a herbicidas inhibidores de la acetolactato sintasa (als) en biotipos de malas hierbas<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Mecanismo de resistencia a herbicidas inhibidores de la acetolactato sintasa (als) en biotipos de malas hierbas <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Mar\u00eda  Dolores Osuna Ruiz <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 C\u00f3rdoba<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 28\/03\/2003<\/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>Rafael De Prado Amian<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: manuel Tena aldave <\/li>\n<li>robert Bulcke (vocal)<\/li>\n<li>karl Hurle (vocal)<\/li>\n<li>julio Men\u00e9ndez calle (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mar\u00eda Dolores Osuna Ruiz La resistencia a herbicidas constituye uno de los aspectos m\u00e1s importantes relacionados con [&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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