{"id":15252,"date":"2018-03-09T09:02:20","date_gmt":"2018-03-09T09:02:20","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/neocentromeros-en-plantas-estudios-citogeneticos-y-moleculares\/"},"modified":"2018-03-09T09:02:20","modified_gmt":"2018-03-09T09:02:20","slug":"neocentromeros-en-plantas-estudios-citogeneticos-y-moleculares","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/neocentromeros-en-plantas-estudios-citogeneticos-y-moleculares\/","title":{"rendered":"Neocentromeros en plantas. estudios citogeneticos y moleculares"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Silvia Manzanero Alonso <\/strong><\/h2>\n<p>Los neocentr\u00f3meros de plantas aparecen lejos de la cromatina cetrom\u00e9rica, se muestran activos junto al verdadero centr\u00f3mero y comparten con \u00e9ste la capacidad de movimiento hacia los polos del huso. Los m\u00e1s estudiados, que son los de ma\u00edz, y centeno, se activan exclusivamente en meiosis. Estos neocentr\u00f3meros se ven como extensiones de cromatina fuertemente orientadashacia los polos, para la segregaci\u00f3n de los cromosomas se ve poco afectada por ellos. En este trabajo se caracterizan dos tipos de neocentr\u00f3meros de centeno:  (i) neocentr\u00f3meros terminales. Est\u00e1n presentes en plantas de la poblaci\u00f3n paldang, de polizaci\u00f3n libre, donde todos los cromosomas pueden mostrar activar neoc\u00e9ntrica en meiosis desde metafase i hasta anafase ii. Los neocentr\u00f3meros se localizan en la heterocromatina terminal sensible al bandeo c, formada principalmente por secuencias repetidas en t\u00e1ndem. Tres de estas secuencias, psc34, psc74 y psc200, tras llevar acabo hibridaci\u00f3n in situ, revelaron extensiones de cromatina en los neocentromeros que no aparecian en las plantas control. Mediante inmunolocalizaci\u00f3n con anti a-tubulina se vieron en ocasiones microt\u00fabulos unidos a los neocentr\u00f3meros. La tecnica de impregnaci\u00f3n arg\u00e9ntica mostr\u00f3 acumulaciones de proteinas en las regiones terminales de los cromosomas con y sin neocentr\u00f3meros. Sin embargo, el anticuerpo mpm-2, que revelalos cinetoros en metafase, no detect\u00f3 las regiones terminales. no existen diferencias en la metilacion de citosinas en estas regiones entre plantas con y sin neocentromeros.  (ii) neocentr\u00f3mero intersticial en el brazo largo del cromosoma 5r. Aunque se ha decrito tambien en otros materiales, aqu\u00ed se ha estudiado en un alinea de adici\u00f3n trigo-5rl. Una constricci\u00f3n intersticial aparece estirada en primera division mie\u00f3tica, y puede formar un neocentromero en metafase i. En anafasei la constricci\u00f3n es capaz de mantener las crom\u00e1tidas hermanas unidas, que es otra de las<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Neocentromeros en plantas. estudios citogeneticos y moleculares<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Neocentromeros en plantas. estudios citogeneticos y moleculares <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Silvia Manzanero Alonso <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 24\/01\/2002<\/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> Puertas Gallego M. Jes\u00fas<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Juan  ramon Lacadena  calero <\/li>\n<li>alfredo Villasante atienza (vocal)<\/li>\n<li>julio Sanchez rufas (vocal)<\/li>\n<li>carmen Ramos corrales (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Silvia Manzanero Alonso Los neocentr\u00f3meros de plantas aparecen lejos de la cromatina cetrom\u00e9rica, se muestran activos junto [&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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[35,962,45144],"tags":[10596,48733,7789,4148,4145,48732],"class_list":["post-15252","post","type-post","status-publish","format-standard","hentry","category-ciencias-de-la-vida","category-genetica","category-genetica-molecular-de-plantas","tag-alfredo-villasante-atienza","tag-carmen-ramos-corrales","tag-juan-ramon-lacadena-calero","tag-julio-sanchez-rufas","tag-puertas-gallego-m-jesus","tag-silvia-manzanero-alonso"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/15252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=15252"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/15252\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=15252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=15252"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=15252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}