{"id":75770,"date":"2018-03-09T23:21:02","date_gmt":"2018-03-09T23:21:02","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/caracterizacion-a-nivel-genetico-y-molecular-de-la-produccion-de-bacteriocina-por-rhizobium-leguminosarum-bv-viciae-cepa-z25\/"},"modified":"2018-03-09T23:21:02","modified_gmt":"2018-03-09T23:21:02","slug":"caracterizacion-a-nivel-genetico-y-molecular-de-la-produccion-de-bacteriocina-por-rhizobium-leguminosarum-bv-viciae-cepa-z25","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/caracterizacion-a-nivel-genetico-y-molecular-de-la-produccion-de-bacteriocina-por-rhizobium-leguminosarum-bv-viciae-cepa-z25\/","title":{"rendered":"Caracterizaci\u00f3n a nivel gen\u00e9tico y molecular de la producci\u00f3n de bacteriocina por rhizobium leguminosarum bv. viciae cepa z25"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Mora De Zayas Laura <\/strong><\/h2>\n<p>La producci\u00f3n de bacteriocinas (rizobiocinas) por cepas del g\u00e9nero rhizobium ha sido se\u00f1alada reiteradamente como un factor muy influyente en la capacidad competitiva, as\u00ed como una caracter\u00edstica susceptible de manipulaci\u00f3n para la construcci\u00f3n de cepas mejoradas. Como parte de un estudio m\u00e1s amplio sobre interacci\u00f3n entre microorganismos de la rizosfera del haba com\u00fan (vicia faba l.) Y dentro de un proyecto subvencionado por el programa nacional de investigaci\u00f3n agr\u00edcola (agri91-0714), el grupo de microbiolog\u00eda ambiental de la universidad de granada efectu\u00f3 una b\u00fasqueda de cepas de r. Leguminosarum bv. Viciae productoras de rizobiocinas. Se aisl\u00f3 la cepa z25 (cect 4585), que mostr\u00f3 una potente actividad bacteriocinog\u00e9nica frente a todas las cepas de r. Leguminosarum bv. Viciae utilizadas como indicadores, sin efectos inhibitorios sobre otros grupos de microorganismos del suelo. Estos resultados sugieren que la cepa z25 produce una rizobiocina con un espectro de acci\u00f3n restringido a las cepas con las que puede competir directamente por la nodulaci\u00f3n, sin afectar a otros microorganismos sapr\u00f3fitos o beneficiosos de la rizosfera.    la producci\u00f3n de bacteriocina por la cepa z25 de rhizobium leguminosarum bv. Viciae est\u00e1 determinada por los genes rzccade, los cuales comparten homolog\u00eda con genes que forman parte de operones responsables de la producci\u00f3n de toxinas de la familia rtx. Los genes rzc se encuentran localizados en uno de los tres megapl\u00e1smidos que posee la cepa z25 de rhizobium leguminosarum bv. Viciae, con un peso molecular aproximado de 360 mda.    rhizobium leguminosarum bv. Viciae cepa z25 porta hom\u00f3logos de los genes cinr y cini involucrados en mecanismos de percepci\u00f3n de qu\u00f3rum mediados por acil-homoserina lactonas (ahls). La mutante de la cepa z25 en el gen cini se ve afectada en la producci\u00f3n de ahls, observ\u00e1ndose una reducci\u00f3n o total desaparici\u00f3n de cuatro de las ahls detectadas mediante cromatograf\u00eda en capa fin<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Caracterizaci\u00f3n a nivel gen\u00e9tico y molecular de la producci\u00f3n de bacteriocina por rhizobium leguminosarum bv. viciae cepa z25<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Caracterizaci\u00f3n a nivel gen\u00e9tico y molecular de la producci\u00f3n de bacteriocina por rhizobium leguminosarum bv. viciae cepa z25 <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Mora De Zayas Laura <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Granada<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 15\/07\/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>Jes\u00fas Gonz\u00e1lez L\u00f3pez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: tom\u00e1s Ruiz arg\u00ed\u00bceso <\/li>\n<li>eulogio Bedmar g\u00f3mez (vocal)<\/li>\n<li>carmen Lluch pla (vocal)<\/li>\n<li>pedro Francisco Mateos gonz\u00e1lez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mora De Zayas Laura La producci\u00f3n de bacteriocinas (rizobiocinas) por cepas del g\u00e9nero rhizobium ha sido se\u00f1alada [&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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