{"id":22261,"date":"2018-03-09T09:12:21","date_gmt":"2018-03-09T09:12:21","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/aislamiento-y-caracterizacion-de-nuevos-genes-de-patogenicidad-en-fusarium-oxysporum-con-funcion-desconocida-mediante-mutagenesis-por-insercion\/"},"modified":"2018-03-09T09:12:21","modified_gmt":"2018-03-09T09:12:21","slug":"aislamiento-y-caracterizacion-de-nuevos-genes-de-patogenicidad-en-fusarium-oxysporum-con-funcion-desconocida-mediante-mutagenesis-por-insercion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/botanica\/aislamiento-y-caracterizacion-de-nuevos-genes-de-patogenicidad-en-fusarium-oxysporum-con-funcion-desconocida-mediante-mutagenesis-por-insercion\/","title":{"rendered":"Aislamiento y caracterizaci\u00f3n de nuevos genes de patogenicidad en fusarium oxysporum con funci\u00f3n desconocida mediante mutag\u00e9nesis por inserci\u00f3n"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Marta P\u00e9rez Madrid <\/strong><\/h2>\n<p>El g\u00e9nero fusarium comprende un gran n\u00famero de especies de suelo de distribuci\u00f3n cosmopolita conocidas desde hace muchos como importantes pat\u00f3genos de plantas (moss y smith, 1984). M\u00e1s recientemente, se ha descrito tambi\u00e9n a fusarium como un pat\u00f3geno humano en pacientes inmunodeprimidos (vartivarian et al., 1993). La especie m\u00e1s com\u00fan, f.Oxysporum, causa enfermedad por marchitez vascular en una gran variedad de cultivos econ\u00f3micamente importantes (beckman, 1987).  en este trabajo, se ha llevado a cabo un escrutinio de genes implicados en la infecci\u00f3n del hu\u00e9sped mediante mutag\u00e9nesis por inserci\u00f3n. Se han introducido cambios en el gen\u00f3ma de f.Oxysporum por transformaci\u00f3n mediada por dna y se han seleccionado los transformados con defectos en su virulencia. esta estrategia ha sido utilizada previamente para identificar nuevos genes implicados en la patog\u00e9nesis f\u00fangica (lu et al., 1994; dufresne et al., 2000).  se describe la caracterizaci\u00f3n de un mutante insercional de f.Oxysporum f.Sp.Lycopersici con una reducci\u00f3n dr\u00e1stica en su virulencia. El gen afectado, chsv, determina una prote\u00edna hom\u00f3loga a la sintasas de quitina de clase v con un dominio caracter\u00edstico motor de miosina.  la quitina, un polisac\u00e1rido de n-acetilglucosamina unida por enlaces beta-1,4, es un componente estructural principal de las paredes celulares f\u00fangicas. los hongos tienen m\u00faltiples clases de sintasas de quitina que catalizan la polimerizaci\u00f3n de la n-acetilglucosamina.  el mutante por inserci\u00f3n y un mutante por anulaci\u00f3n dirigida de f.Oxysporum presentan anormalidades morfol\u00f3gicas, como zonas infladas en las hifas, que indican alteraciones en la estabilidad de la parede celular y que pueden restaurarse parcialmente mediante un estabilizador osm\u00f3tico.  los mutantes carentes de chsv no son capaces de infectar y colonizar las plantas de tomante ni de crecer invasivamente en tejido fresco de tomate y son hipersensibles a compuestos d<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Aislamiento y caracterizaci\u00f3n de nuevos genes de patogenicidad en fusarium oxysporum con funci\u00f3n desconocida mediante mutag\u00e9nesis por inserci\u00f3n<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Aislamiento y caracterizaci\u00f3n de nuevos genes de patogenicidad en fusarium oxysporum con funci\u00f3n desconocida mediante mutag\u00e9nesis por inserci\u00f3n <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Marta P\u00e9rez Madrid <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 C\u00f3rdoba<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 27\/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>Mar\u00eda  Isabel Gonzalez Roncero<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Rafael manuel Jimenez diaz <\/li>\n<li>c\u00e9sar Roncero ma\u00edllo (vocal)<\/li>\n<li>enrique Cerd\u00e1 olmedo (vocal)<\/li>\n<li>Mar\u00eda Molina mart\u00edn (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Marta P\u00e9rez Madrid El g\u00e9nero fusarium comprende un gran n\u00famero de especies de suelo de distribuci\u00f3n cosmopolita [&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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