{"id":76178,"date":"2018-03-09T23:21:31","date_gmt":"2018-03-09T23:21:31","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/caracterizacion-genetica-y-molecular-de-mutantes-de-arabidopsis-thaliana-alterados-en-la-expresion-de-genes-de-defensa\/"},"modified":"2018-03-09T23:21:31","modified_gmt":"2018-03-09T23:21:31","slug":"caracterizacion-genetica-y-molecular-de-mutantes-de-arabidopsis-thaliana-alterados-en-la-expresion-de-genes-de-defensa","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/caracterizacion-genetica-y-molecular-de-mutantes-de-arabidopsis-thaliana-alterados-en-la-expresion-de-genes-de-defensa\/","title":{"rendered":"Caracterizaci\u00f3n gen\u00e9tica y molecular de mutantes de arabidopsis thaliana alterados en la expresi\u00f3n de genes de defensa"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Mar\u00eda Del Carmen Marqu\u00e9s Romero <\/strong><\/h2>\n<p>En el presente trabajo hemos caracterizado varios mutantes de arabidopsis thaliana que presentan defectos en la expresi\u00f3n de genes relacionados con la defensa.  los mutantes obi (overexpressor of basic pr1 isoform) expresan constitutivamente el transg\u00e9n pr1b1::gus, formado por la fusi\u00f3n transcripcional del promotor del gen pr1b1 (que codifica para una isoforma b\u00e1sica de la familia pr1 de tomate) con la regi\u00f3n codificante del gen marcador gus. Un estudio detallado del mutante recesivo obi1 muestra que \u00e9ste presenta una mayor acumulaci\u00f3n de etileno (et) tras la infecci\u00f3n con la bacteria pseudomonas syringae pero defectos en la activaci\u00f3n de los genes dependientes de \u00e1cido jasm\u00f3nico(ja) y et a pesar de no presentar alteraciones en la percepci\u00f3n de ambas se\u00f1ales. este mutante tambi\u00e9n muestra una mayor activaci\u00f3n de las respuestas dependientes de \u00e1cido salic\u00edlico (sa) y una mayor acumulaci\u00f3n de sa, aunque ello no se traduce en una diferencia en los niveles de resistencia a diferentes pat\u00f3genos. El an\u00e1lisis de los dobles mutantes obtenidos entre obi1 y otros mutantes relacionados con la defensa, como es el caso de npr1, cpr1, etr1 o la l\u00ednea transg\u00e9nica nahg, permite observar un requerimiento de sa para la expresi\u00f3n constitutiva de pr1b1::gus. Adicionalmente, hemos observado que la mutaci\u00f3n obi1 resulta ser de naturaleza dominante para el control de las respuestas dependientes de sa y recesiva para la regulaci\u00f3n de las dependientes de et, lo cual har\u00eda pensar en una posible implicaci\u00f3n de obi1 en la amplificaci\u00f3n de la se\u00f1al de sa para el establecimiento de sar. observamos en este estudio que la activaci\u00f3n del transg\u00e9n pr1b1::gus requiere la acci\u00f3n conjunta de las se\u00f1ales sa y et y est\u00e1 asociada a los s\u00edntomas clor\u00f3ticos que se producen en el lugar de la infecci\u00f3n. La aplicaci\u00f3n ex\u00f3gena de ambas se\u00f1ales produce en plantas salvajes no s\u00f3lo la aceleraci\u00f3n de la senescencia sino tambi\u00e9n un incremento en la<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Caracterizaci\u00f3n gen\u00e9tica y molecular de mutantes de arabidopsis thaliana alterados en la expresi\u00f3n de genes de defensa<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Caracterizaci\u00f3n gen\u00e9tica y molecular de mutantes de arabidopsis thaliana alterados en la expresi\u00f3n de genes de defensa <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Mar\u00eda Del Carmen Marqu\u00e9s Romero <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Valencia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 15\/09\/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>Pablo Vera Vera<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: paloma Abad campos <\/li>\n<li>lucia Jorda miro (vocal)<\/li>\n<li>victor Flors herrero (vocal)<\/li>\n<li> Carrasco jimenez Jos\u00e9 Luis (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mar\u00eda Del Carmen Marqu\u00e9s Romero En el presente trabajo hemos caracterizado varios mutantes de arabidopsis thaliana que [&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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