{"id":133352,"date":"1997-01-01T00:00:00","date_gmt":"1997-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/detoxificacion-de-la-alfa-tomatina-por-fusarium-oxysporum\/"},"modified":"1997-01-01T00:00:00","modified_gmt":"1997-01-01T00:00:00","slug":"detoxificacion-de-la-alfa-tomatina-por-fusarium-oxysporum","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/detoxificacion-de-la-alfa-tomatina-por-fusarium-oxysporum\/","title":{"rendered":"Detoxificacion de la alfa-tomatina por \u00abfusarium oxysporum\u00bb."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Khalid Lairini <\/strong><\/h2>\n<p>La alfa-tomatina es un compuesto antifungico presente en la planta de tomate (lycopersicon esculentum) y se piensa que constituye una barrera quimica contra los hongos fitopatogenos. Fusarium oxysporum f. Sp. Iycopersici, un patogeno vascular de la panta de tomate produce una enzima extracelular inducible por alfa-tomatina. Esta enzima, conocida como \u00abtomatinasa\u00bb, cataliza la hidrolisis de la alfa-tomatina en productos no fungitoxicos: la tomatidina y la beta-iycotetraosa. La tomatinasa purificada consiste en un monomero de 50 kda con al menos cinco isoformas con pls entre 4.8 y 5.8. El tratamiento de la tomatinasa purificada con n-glicosidasa f origino una proteina de 45 kda. Experimentos de cinetica enzimatica realizados a 30 grados c dieron un valor de km de 1.1 mm para la alfa-tomatina y un vmax de 118  mol\/min.Mg de proteina. Se calculo una energia de activacion de 88 kj\/mol. Hasta el presente, la actividad tomatinasa se ha encontrado exclusivamente en hongos patogenos de la planta de tomate. En este trabajo se ha mostrado la induccion de enzimas que detoxifican alfa-tomatina en diferentes formae speciales de f.  oxysporum no patogenas de la planta de tomate, tales como tuberosi, melonis, niveum y gladioli. Estas formae speciales son patogenas naturales de otros hospedadores, algunos de ellos son filogeneticamente relacionados con la planta de tomate y otros no. Las tomatinasas inducidas en estas formae speciales tienen la misma masa molecular y el mismo mecanismo de accion que la tomatinasa de f.  oxysporum f. Sp. Iycopersici. Estas enzimas son reconocidas por el anticuerpo policlonal anti-tomatinasa de f. Oxysporum f. Sp. Iycopersici. Estas observaciones sugieren que las enzimas con actividad tomatinasa son analogas en las diferentes formae speciales estudiadas.  con el objetivo de averiguar si la tomatinasa de 50 kda tambien se induce en otras especies del genero fusarium se analizo dicha enzima en fusarium solani. La to<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Detoxificacion de la alfa-tomatina por \u00abfusarium oxysporum\u00bb.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Detoxificacion de la alfa-tomatina por \u00abfusarium oxysporum\u00bb. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Khalid Lairini <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 C\u00f3rdoba<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1997<\/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>Manuel Ruiz Rubio<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Mar\u00eda  Isabel Gonzalez Roncero <\/li>\n<li>Santiago Torres Mart\u00ednez (vocal)<\/li>\n<li>Victor Rubio Susan (vocal)<\/li>\n<li>Manuel Pineda Priego (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Khalid Lairini La alfa-tomatina es un compuesto antifungico presente en la planta de tomate (lycopersicon esculentum) y [&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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