{"id":107175,"date":"2011-04-03T00:00:00","date_gmt":"2011-04-03T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/efectos-de-la-deficiencia-en-boro-sobre-la-asimilacion-del-nitrogeno-en-plantas-de-arabidopsis-y-tabaco-expresion-genica-y-niveles-de-metabolitos\/"},"modified":"2011-04-03T00:00:00","modified_gmt":"2011-04-03T00:00:00","slug":"efectos-de-la-deficiencia-en-boro-sobre-la-asimilacion-del-nitrogeno-en-plantas-de-arabidopsis-y-tabaco-expresion-genica-y-niveles-de-metabolitos","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/biologia-celular\/efectos-de-la-deficiencia-en-boro-sobre-la-asimilacion-del-nitrogeno-en-plantas-de-arabidopsis-y-tabaco-expresion-genica-y-niveles-de-metabolitos\/","title":{"rendered":"Efectos de la deficiencia en boro sobre la asimilacion del nitrogeno en plantas de arabidopsis  y tabaco: expresion genica y niveles de metabolitos"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Victor Manuel Beato Galvan <\/strong><\/h2>\n<p>El principal objetivo de este trabajo ha sido estudiar c\u00f3mo la deficiencia en boro (b) afecta a corto plazo a la asimilaci\u00f3n del nitr\u00f3geno (n), adem\u00e1s de la posible funci\u00f3n del b en la expresi\u00f3n g\u00e9nica. Para ello, se han analizado en plantas cultivadas con diferentes fuentes de n la expresi\u00f3n de genes, actividades enzim\u00e1ticas, y el contenido de diversos metabolitos implicados en el metabolismo del n. Para este objetivo se han empleado las especies arabidopsis thaliana y nicotiana tabacum junto con t\u00e9cnicas de biolog\u00eda molecular (microarrays y q-rt-pcr), espectrofotometr\u00eda, hplc y metabol\u00f3mica. de acuerdo con los resultados de este trabajo, se propone un posible modelo para explicar c\u00f3mo a corto plazo las ra\u00edces de las plantas de tabaco responden al estr\u00e9s por la falta de b. Dos de los primeros efectos de esta deficiencia mineral ser\u00edan el descenso en las concentraciones de glucosa y fructosa y un incremento en los niveles de amino\u00e1cidos. La disminuci\u00f3n en hexosas inducir\u00eda la expresi\u00f3n de los genes que codifican la glutamato deshidrogenasa (gdh) y la asparragina sintetasa (as). La actividad desaminante de la gdh suministrar\u00eda 2-oxoglutarato (2-0g) y amonio. As\u00ed, el 2-0g ayudar\u00eda a mantener el ciclo de krebs en condiciones limitantes de carbono, y el amonio liberado se reciclar\u00eda a trav\u00e9s del ciclo gs-gogat y de la enzima as. Esto evitar\u00eda tanto que el amonio alcanzase niveles t\u00f3xicos como el agotamiento de amino\u00e1cidos. Adem\u00e1s del descenso en hexosas, el menor contenido en b soluble podr\u00eda disparar la sobreexpresi\u00f3n de los genes que codifican la gdh y la as, tal como se ha discutido en este trabajo.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Efectos de la deficiencia en boro sobre la asimilacion del nitrogeno en plantas de arabidopsis  y tabaco: expresion genica y niveles de metabolitos<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Efectos de la deficiencia en boro sobre la asimilacion del nitrogeno en plantas de arabidopsis  y tabaco: expresion genica y niveles de metabolitos <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Victor Manuel Beato Galvan <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Pablo de olavide<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 04\/03\/2011<\/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>Agustin Gonzalez Fontes De Albornoz<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 M\u00aa Maldonado ruiz <\/li>\n<li>aurora Galvan cejudo (vocal)<\/li>\n<li>sof\u00eda Garc\u00eda-mauri\u00f1o  ruiz-berdejo (vocal)<\/li>\n<li>ildefonso Bonilla mangas (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Victor Manuel Beato Galvan El principal objetivo de este trabajo ha sido estudiar c\u00f3mo la deficiencia en [&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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