{"id":78443,"date":"2018-03-09T23:24:06","date_gmt":"2018-03-09T23:24:06","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/enzimas-antioxidantes-en-leguminosas\/"},"modified":"2018-03-09T23:24:06","modified_gmt":"2018-03-09T23:24:06","slug":"enzimas-antioxidantes-en-leguminosas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisiologia-vegetal\/enzimas-antioxidantes-en-leguminosas\/","title":{"rendered":"Enzimas antioxidantes en leguminosas."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Clemente Gallardo Mar\u00eda Rebeca <\/strong><\/h2>\n<p>La leguminosa modelo lotus japonicus produce mayoritariamente (96%) homoglutati\u00f3n en las hojas y ra\u00edces, y glutati\u00f3n (65%) en los n\u00f3dulos. Estas variaciones en los contenidos de tioles de los tejidos est\u00e1n determinadas por una expresi\u00f3n diferencial de los enzimas glutati\u00f3n sintetasa y homoglutati\u00f3n sintetasa. La expresi\u00f3n del gen glutati\u00f3n sintetasa exclusivamente en los n\u00f3dulos indica que el glutati\u00f3n puede desempe\u00f1ar un papel espec\u00edfico en la simbiosis. Existe una copia \u00fanica del gen glutati\u00f3n sintetasa en el genoma de lotus. Sin embargo, en los n\u00f3dulos se pueden detectar dos poblaciones de transcritos que codifican, respectivamente, glutati\u00f3n sintetasa sin p\u00e9ptido se\u00f1al (isoforma citos\u00f3lica) o con un p\u00e9ptido se\u00f1al en el extremo n-terminal (isoforma plastidial). el cadmio induce r\u00e1pidamente la bios\u00edntesis de tioles en plantas de lotus. Particularmente notables son el incremento de ?-Glutamilciste\u00edna y la activaci\u00f3n de la s\u00edntesis de (homo)fitoquelatinas en las primeras horas de tratamiento. Puesto que el mrna del gen y-glutamilciste\u00edna sintetasa no se ve afectado por el tratamiento con cadmio, mientras que el contenido de prote\u00edna espec\u00edfica aumenta dos veces y el de y-glutamilciste\u00edna cien veces, el enzima est\u00e1 regulado a nivel traduccional y principalmente postraduccional. El genoma de lotus contiene tres genes fitoquelatina sintasa (pcs), que se encuentran agrupados en el cromosoma 1, y que probablemente provienen de dos eventos de duplicaci\u00f3n. Los an\u00e1lisis de secuencias de dna y prote\u00ednas sugieren que la primera duplicaci\u00f3n origin\u00f3 ljpcs1 y un gen que dio lugar a ljpcs2 y ljpcs3. Esta \u00faltima tuvo lugar probablemente durante la evoluci\u00f3n, una vez que las leguminosas hab\u00edan divergido de otras plantas superiores. Por otra parte, el gen \u00abphytochelatin synthase-iike\u00bb (psl) no codifica una aut\u00e9ntica fitoquelatina sintasa, a diferencia de lo postulado por los autores que anotaron inicialmente la secuencia. en los n\u00f3dulos i<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Enzimas antioxidantes en leguminosas.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Enzimas antioxidantes en leguminosas. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Clemente Gallardo Mar\u00eda Rebeca <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Zaragoza<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 27\/01\/2006<\/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 Becana Ausejo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: carmen Lluch pla <\/li>\n<li>francisca Sevilla valenzuela (vocal)<\/li>\n<li>ildefonso Bonilla mangas (vocal)<\/li>\n<li>Manuel Meg\u00edas guijo (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Clemente Gallardo Mar\u00eda Rebeca La leguminosa modelo lotus japonicus produce mayoritariamente (96%) homoglutati\u00f3n en las hojas 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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