{"id":79662,"date":"2018-03-09T23:25:30","date_gmt":"2018-03-09T23:25:30","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/factores-anatomicos-y-qua%c2%admicos-del-xilema-de-ulmus-minor-mill-relacionados-con-la-resistencia-a-ophiostoma-novo-ulmi-brasier\/"},"modified":"2018-03-09T23:25:30","modified_gmt":"2018-03-09T23:25:30","slug":"factores-anatomicos-y-qua%c2%admicos-del-xilema-de-ulmus-minor-mill-relacionados-con-la-resistencia-a-ophiostoma-novo-ulmi-brasier","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-agrarias\/factores-anatomicos-y-qua%c2%admicos-del-xilema-de-ulmus-minor-mill-relacionados-con-la-resistencia-a-ophiostoma-novo-ulmi-brasier\/","title":{"rendered":"Factores anat\u00f3micos y qu\u00edmicos del xilema de ulmus minor mill. relacionados con la resistencia a ophiostoma novo-ulmi brasier"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Juan  Antonio Martin Garc\u00eda <\/strong><\/h2>\n<p>Las poblaciones de ulmus minor europeas se encuentran seriamente amenazadas por la grafiosis, la enfermedad m\u00e1s devastadora y difundida de los olmos. ophiostoma novo-ulmi se desarrolla en el interior de los vasos del xilema cusando su cavitaci\u00f3n. Este proceso origina marchitamiento foliar y, en la casi totalidad de los casos, la muerte del \u00e1rbol. En el presente trabajo, se ha estudiado en u. Minor la variaci\u00f3n de la susceptibilidad con la edad y su posible relaci\u00f3n con la variaci\u00f3n de las caracter\u00edsticas anat\u00f3micas del xilema, y se ha comparado la formaci\u00f3n estacional del xilema en u. minor con la de una especie tolerante a la grafiosis, u. Pumila. Asimismo, se ha aplicado espectroscopia de infrarrojo de transformada de fourier (ft-ir), junto con t\u00e9cnicas de an\u00e1lisis multivariante, para analizar cambios metab\u00f3licos en tejidos de xilema de u. Minor infectados con o. Novo-ulmi, y para comparar perfiles metab\u00f3licos de olmos de diferente grado de resistencia. los resultados mostraron resistencia juvenil en olmos de dos y tres savias. se observ\u00f3 una relaci\u00f3n significativa entre la variaci\u00f3n de la susceptibilidad con la edad y la variaci\u00f3n de determinados factores anat\u00f3micos. Un menor di\u00e1metro medio de los vasos, una menor conductancia hidr\u00e1ulica te\u00f3rica, y una menor proporci\u00f3n de vasos de grandes dimensiones en la madera temprana se asociaron con mayores niveles de resistencia. Se piensa que estos factores contribuyen a una menor expansi\u00f3n del pat\u00f3geno por el sistema vascular y a una mayor facilidad para la compartimentaci\u00f3n de la enfermedad. U.Minor form\u00f3 vasos de mayores di\u00e1metros que u. Pumila al comienzo del periodo vegetativo, pero a partir del 15 de junio los di\u00e1metros de los vasos fueron mayores en u. Pumila. Tras la inoculaci\u00f3n de u. Minor con o. Novo-ulmi, se produjo una reducci\u00f3n en los niveles de polisac\u00e1ridos del xilema y un aumento en los niveles de compuestos fen\u00f3licos. Se observ\u00f3 la formaci\u00f3n de b<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Factores anat\u00f3micos y qu\u00edmicos del xilema de ulmus minor mill. relacionados con la resistencia a ophiostoma novo-ulmi brasier<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Factores anat\u00f3micos y qu\u00edmicos del xilema de ulmus minor mill. relacionados con la resistencia a ophiostoma novo-ulmi brasier <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Juan  Antonio Martin Garc\u00eda <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 25\/04\/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>Alejandro Solla Hach<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Luis Garc\u00eda esteban <\/li>\n<li>rosa Raposo llobet (vocal)<\/li>\n<li>Manuel Antonio Coimbra rodrigues da silva (vocal)<\/li>\n<li>julio D\u00edez casero (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Juan Antonio Martin Garc\u00eda Las poblaciones de ulmus minor europeas se encuentran seriamente amenazadas por la grafiosis, [&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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