{"id":38729,"date":"2018-03-09T09:38:27","date_gmt":"2018-03-09T09:38:27","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/caracterizacion-de-bacterias-del-genero-sino-rhizobium-que-nodulan-alfalfa-en-suelos-acidos-de-argentina-y-uruguay\/"},"modified":"2018-03-09T09:38:27","modified_gmt":"2018-03-09T09:38:27","slug":"caracterizacion-de-bacterias-del-genero-sino-rhizobium-que-nodulan-alfalfa-en-suelos-acidos-de-argentina-y-uruguay","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/caracterizacion-de-bacterias-del-genero-sino-rhizobium-que-nodulan-alfalfa-en-suelos-acidos-de-argentina-y-uruguay\/","title":{"rendered":"Caracterizacion de bacterias del genero (sino) rhizobium que nodulan alfalfa en suelos acidos de argentina y uruguay."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Eduardo Segundo Lopez <\/strong><\/h2>\n<p>Este trabajo se encuadra dentro de un proyecto internacional de investigaci\u00f3n financiado por la uni\u00f3n europea ante el problema de acidificaci\u00f3n de suelos que est\u00e1n sufriendo los alfalfares de argentina y uruguay. En estos pa\u00edses existen unos 5 millones de ha de prados cultivados con alfalfa (medicago sativa) que sirven de alimento al ganado vacuno. Debido a la alta fuente proteica que proporciona esta alimentaci\u00f3n las carnes de este ganado tienen una gran aceptaci\u00f3n mundial. Por otra parte la bacteria sinorhizobium meliloti realiza (en simbiosis con las ra\u00edces de alfalfa en estructuras llamadas n\u00f3dulos) el aporte de nitr\u00f3geno a la planta de una forma barata y no contaminante, por la fijaci\u00f3n biol\u00f3gica de nitr\u00f3geno, fbn. Por medio de este proceso se le suministra nitr\u00f3geno a los cultivos, con lo que se alcanza un \u00f3ptimo crecimiento vegetal. La acidificaci\u00f3n del suelo induce una disminuci\u00f3n de esas bacterias y por tanto una disminuci\u00f3n de la producci\u00f3n de alfalfa en estos pa\u00edses.  en esta tesis doctoral se caracterizan un grupo de bacterias aisladas de suelos \u00e1cidos de argentina y uruguay, que infectan las ra\u00edces de alfalfa, con el fin de estudiar el problema del cultivo de alfalfa en acidez y seleccionar unas bacterias para preparar un inoculante biol\u00f3gico (abono, econ\u00f3micamente muy rentable, preparado con estas bacterias). Se realizaron estudios de crecimiento bacteriano in vitro a distintos phs; estudios de la biodiversidad de la poblaci\u00f3n bacteriana por t\u00e9cnicas de gen\u00e9tica molecular como son \u00abis-fingerprint\u00bb (\u00abhuella dactilar\u00bb) y secuenciaci\u00f3n de adn ribos\u00f3mico 16s; estudios de fisiolog\u00eda de la interacci\u00f3n simbi\u00f3tica bacteria-planta, en cultivo hidrop\u00f3nico a distintos phs, midiendo par\u00e1metros como son el n\u00famero de n\u00f3dulos fijadores de dinitr\u00f3geno, competitividad por la nodulaci\u00f3n y producci\u00f3n vegetal; estudios de microscop\u00eda \u00f3ptica comparativa y estudios de simulaci\u00f3n de las condicio<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Caracterizacion de bacterias del genero (sino) rhizobium que nodulan alfalfa en suelos acidos de argentina y uruguay.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Caracterizacion de bacterias del genero (sino) rhizobium que nodulan alfalfa en suelos acidos de argentina y uruguay. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Eduardo Segundo Lopez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Granada<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 23\/10\/1998<\/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>Nicol\u00e1s Toro Garc\u00eda<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Antonio Palomares d\u00edaz <\/li>\n<li>pedro Francisco Mateos gonz\u00e1lez (vocal)<\/li>\n<li>Francisco j Temprano vera (vocal)<\/li>\n<li>Jos\u00e9 enrique Ruiz sainz (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Eduardo Segundo Lopez Este trabajo se encuadra dentro de un proyecto internacional de investigaci\u00f3n financiado por la [&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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