{"id":93392,"date":"2018-03-11T10:12:43","date_gmt":"2018-03-11T10:12:43","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/abscisic-acid-signal-transduction-regulation-by-hab1-and-interaction-with-brassinosteroids-mediated-by-brx\/"},"modified":"2018-03-11T10:12:43","modified_gmt":"2018-03-11T10:12:43","slug":"abscisic-acid-signal-transduction-regulation-by-hab1-and-interaction-with-brassinosteroids-mediated-by-brx","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/reguladores-del-crecimiento-de-las-plantas\/abscisic-acid-signal-transduction-regulation-by-hab1-and-interaction-with-brassinosteroids-mediated-by-brx\/","title":{"rendered":"Abscisic acid signal transduction: regulation by hab1 and interaction with brassinosteroids mediated by brx"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Am\u00e9rico Do Patroc\u00ednio Rodrigues <\/strong><\/h2>\n<p>El \u00e1cido absc\u00edsico (aba) desempe\u00f1a un papel decisivo en la regulaci\u00f3n del crecimiento y desarrollo vegetal as\u00ed como en la respuesta de la planta ante situaciones de estr\u00e9s, en particular estreses h\u00eddrico y salino. en un rastreo de mutantes hipersensibles al aba, hemos identificado un nuevo alelo de p\u00e9rdida de funci\u00f3n del gen brx, denominado brx-2. Otros mutantes afectados en la se\u00f1alizaci\u00f3n por brs, bes1-d, bzr1-d y bsu1-d, tambi\u00e9n muestran una mayor sensibilidad a aba en estos ensayos. Al disminuir la sensibilidad a aba de brx1-2 mediante cruce con una l\u00ednea insensible a aba, se consigue una mayor recuperaci\u00f3n del crecimiento de ra\u00edz tras aplicar bl. El tratamiento con aba afecta negativamente la se\u00f1alizaci\u00f3n por auxinas en los mutantes brx-2 y en las plantas silvestres. Estos resultados muestran una interacci\u00f3n entre brs y aba en el control del crecimiento de ra\u00edz e indican que brx modula la sensibilidad de la ra\u00edz al aba. La regulaci\u00f3n de la respuesta a aba es controlada por diversos factores, de entre los cuales fen\u00f3menos de fosforilaci\u00f3n\/desfosforilaci\u00f3n.   Hab1 es una pp2c que, junto a otras pp2cs del grupo a, tiene un papel clave como reguladores negativos de la respuesta a aba. Mediante un rastreo de dos h\u00edbridos identificamos swi3b como una diana prevalente de interacci\u00f3n con hab1. Swi3b forma parte de los complejos remodeladores de cromatina tipo swi\/snf.. Mutantes swi3b mostraban una sensibilidad reducida al aba en ensayos de inhibici\u00f3n de germinaci\u00f3n y crecimiento, as\u00ed como una inducci\u00f3n muy atenuada de los genes rab18 y rd29b en ensayos de expresi\u00f3n g\u00e9nica. La presencia de hab1 en los promotores de rd29b y rab18 fue eliminada al a\u00f1adir aba ex\u00f3geno, lo que sugiere una implicaci\u00f3n directa de hab1 en la regulaci\u00f3n de la transcripci\u00f3n en respuesta a aba. Al contrario del fenotipo de los mutantes swi3b, mutantes de brm y syd, otros miembros putativos de los complexos swi\/snf de arabidopsis, presentan fenotipos de hipersensibilidad a aba en germinaci\u00f3n y crec<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Abscisic acid signal transduction: regulation by hab1 and interaction with brassinosteroids mediated by brx<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Abscisic acid signal transduction: regulation by hab1 and interaction with brassinosteroids mediated by brx <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Am\u00e9rico Do Patroc\u00ednio Rodrigues <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Valencia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 20\/05\/2009<\/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>Pedro Lu\u00eds Rodr\u00edguez Egea<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: crisanto Gutierrez armenta <\/li>\n<li>Ana isabel Ca\u00f1o delgado (vocal)<\/li>\n<li>gabino Rios Garc\u00eda (vocal)<\/li>\n<li>Juan  baustista Jordano fraga (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Am\u00e9rico Do Patroc\u00ednio Rodrigues El \u00e1cido absc\u00edsico (aba) desempe\u00f1a un papel decisivo en la regulaci\u00f3n del crecimiento [&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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