{"id":42835,"date":"1999-08-04T00:00:00","date_gmt":"1999-08-04T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/metabolismo-de-las-poliaminas-en-plantas-transgenicas-de-tabaco\/"},"modified":"1999-08-04T00:00:00","modified_gmt":"1999-08-04T00:00:00","slug":"metabolismo-de-las-poliaminas-en-plantas-transgenicas-de-tabaco","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/metabolismo-de-las-poliaminas-en-plantas-transgenicas-de-tabaco\/","title":{"rendered":"Metabolismo de las poliaminas en plantas transgenicas de tabaco."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Carles Masgrau Comas <\/strong><\/h2>\n<p>En la primera parte del trabajo, se obtuvieron plantas transg\u00e9nicas de tabaco para la regi\u00f3n codificadora del cdna de la adc de avena (n almberg y col., 1990), con el objeto de estudiar los efectos de la sobreeexpresi\u00f3n del transgen sobre el metabolismo de las poliam y el desarrollo vegetal.  en una segunda fase, se obtuvieron plantas transg\u00e9nicas de tabaco para los cdnas homologos correspondientes a la adc, odc, spdsyn, en orientacion sentido y antisentido. A fin de tener datos complementarios a los obtenidos con la adc heterodoga de avena, se profundizar en el estudio de las plantas transgenicas sobreexpresoras de la adn homologa en sentido y antisentido.  las plantas transg\u00e9nicas obtenidas en este trabajo constituyen una herrameinta para estudiar la regulacion del metabolismo, y el modo de acci\u00f3n de las diferentes poliaminas en distintos procesos del crecimiento y desarrollo vegetal.  la sobreexpresi\u00f3n del transgen de avena da lugar, generalmente a un incremento de pas, que se traduce en alteraciones fenotipicas caracterizadas por una disminuci\u00f3n del crecimiento, tanto de la parte aerea como de las raices, asi como por la aparici\u00f3n de clorosis y necrosis foliar (fenotipo toxico).  la sobreexpresion en sentido del gen homologo de la adc de tabaco, afecta a los niveles de rnam de adc, actividad enzimatica y putrescina, que se traducen la alteraciones fenotipicas similares a las observadas por sobrexpresion del gen que codifica para la adc de avena.  la sobreexpresi\u00f3n del genhomologo de la adc en plantas de tabaco afecta afecta a los niveles de expresi\u00f3n de rnam de adc endogena. El fenotipo observado esta relacionado con el inicio de la floraci\u00f3n en plantas de tabaco.  la sobreexpresi\u00f3n del cdna homologo de la odc en plantas transgenicas de tabaco de la linea os1.1, provoca alteraciones en los organos fibrales que afectan a la fertilidad de las flores.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Metabolismo de las poliaminas en plantas transgenicas de tabaco.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Metabolismo de las poliaminas en plantas transgenicas de tabaco. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Carles Masgrau Comas <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 08\/04\/1999<\/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>Antoni Fern\u00e1ndez Tiburcio<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: vicente Conejero tom\u00e1s <\/li>\n<li>Jos\u00e9 Miguel Mart\u00ednez zapater (vocal)<\/li>\n<li>montserrat Pages torrens (vocal)<\/li>\n<li>pedro Carrasco sorl\u00ed (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Carles Masgrau Comas En la primera parte del trabajo, se obtuvieron plantas transg\u00e9nicas de tabaco para la [&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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