{"id":80315,"date":"1999-05-07T00:00:00","date_gmt":"1999-05-07T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/aislamiento-y-caracterizacion-de-mutantes-halotolerantes-en-arabidopsis-thaliana\/"},"modified":"1999-05-07T00:00:00","modified_gmt":"1999-05-07T00:00:00","slug":"aislamiento-y-caracterizacion-de-mutantes-halotolerantes-en-arabidopsis-thaliana","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/aislamiento-y-caracterizacion-de-mutantes-halotolerantes-en-arabidopsis-thaliana\/","title":{"rendered":"Aislamiento y caracterizaci\u00f3n de mutantes halotolerantes en arabidopsis thaliana"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Victor Manuel Quesada P\u00e9rez <\/strong><\/h2>\n<p>Hemos iniciado una aproximaci\u00f3n gen\u00e9tica al problema agron\u00f3mico que representa el estr\u00e9s abi\u00f3tico causado por la salinizaci\u00f3n de las tierras de regad\u00edo, eligiendo como objetivo experimental al sistema modelo arabidopsis thaliana, por su utilidad para el an\u00e1lisis gen\u00e9tico y molecular. Hemos intentado el aislamiento de estirpes con capacidad para germinar en presencia de altas concentraciones salinas, tanto de origen natural como obtenidas mediante mutag\u00e9nesis.  hemos comparado la tolerancia a la salinidad de 102 estirpes silvestres o ecotipos de arabidopsis tahliana, constando la existencia de grandes diferencias en su capacidad para germinar en medios suplementados con nacl 250 mn. Esto puede interpretarse en el sentido de que existe variacion continua, lo que sugiere que la variabilidad natural observada est\u00e1 controlada por loci cuantitativos.  hemos llevado a cabo una b\u00fasqueda de mutantes de arabidopsis tahliana con germinaci\u00f3n halotolerante, empleando varios fondos gen\u00e9ticos y diferentes procedimientos de mutag\u00e9nesis, como el tratamiento con metanosulfonato de etilo, el bombardeo con neutrones r\u00e1pidos y las inseciones del adn-t de agrobacterium tumerfaciens. A partir del escrutinio de 675.500 semillas derivadas de mutag\u00e9nesis, hemos aislado y sometido an\u00e1lisis gen\u00e9tico 17 l\u00edneas mutantes, presentando todas ellas salvo una, tasas de germinaci\u00f3n superiores al 25% en nacl 250 mm, concentraci\u00f3n que inhibe completamente la germinaci\u00f3n de las estirpes silvestres.  el modo de herencia de su fenotipo mutante es monog\u00e9nico y recesivo, aunque parece influido por el fondo gen\u00e9tico de cada estirpe. Su an\u00e1lisis de complementaci\u00f3n indic\u00f3 que correspond\u00edan a 10 mutaciones genuinamente distintas, probablemente hipomorfas o nulas, que fueron asignadas a 5 genes,que hemos denomimado salobre\u00f1o (sa\u00f1). Los resultados de la cartograf\u00eda de los genes sa\u00f1 indican que no se corresponden con ninguna de las mutaciones previamen<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Aislamiento y caracterizaci\u00f3n de mutantes halotolerantes en arabidopsis thaliana<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Aislamiento y caracterizaci\u00f3n de mutantes halotolerantes en arabidopsis thaliana <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Victor Manuel Quesada P\u00e9rez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Miguel hern\u00e1ndez de elche<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 05\/07\/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>Jos\u00e9 Luis Micol Molina<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Francisco Murillo  araujo <\/li>\n<li>Javier Paz ares (vocal)<\/li>\n<li>montserrat Pages torrens (vocal)<\/li>\n<li>Jos\u00e9 Manuel Pardo prieto (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Victor Manuel Quesada P\u00e9rez Hemos iniciado una aproximaci\u00f3n gen\u00e9tica al problema agron\u00f3mico que representa el estr\u00e9s abi\u00f3tico [&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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