{"id":2853,"date":"2022-02-19T15:04:33","date_gmt":"2022-02-19T14:04:33","guid":{"rendered":"https:\/\/michelecrevecoeur.ch\/?page_id=2853"},"modified":"2022-02-19T15:04:56","modified_gmt":"2022-02-19T14:04:56","slug":"xylem-and-phloem-on-longitudinal-sections","status":"publish","type":"page","link":"https:\/\/michelecrevecoeur.ch\/?page_id=2853","title":{"rendered":"Xylem and phloem on longitudinal sections"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2853\" class=\"elementor elementor-2853\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6c62a2d8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6c62a2d8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-18f3ba22\" data-id=\"18f3ba22\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-46253c9 elementor-widget elementor-widget-text-editor\" data-id=\"46253c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"margin-top: 15px; margin-bottom: 15px; line-height: 25.2px; color: #404040; font-family: arial; font-size: 14px; font-style: normal; font-weight: 400; text-align: center;\"><strong><span style=\"font-size: medium; color: #000080;\">Microphotographs of xylem and phloem on longitudinal sections<br \/><\/span><\/strong><\/p><p style=\"margin-top: 15px; margin-bottom: 15px; line-height: 25.2px; color: #404040; font-family: arial; font-size: 14px; font-style: normal; font-weight: 400;\">Xylem vessels and sieve tubes are easier to be recognized on longitudinal sections\u00a0than on cross sections. However cross sections give important information ontheir distribution in different organs and allow to determine in which organ a\u00a0section is made and whether it is a monocotyledon or a dicotyledon. Microphotographs\u00a0on this page illustrate two portions of longitudinal sections.<br \/>The first microphotgraph below illustrates\u00a0part of a longitudinal section at the level of primary xylem and phloem in a young stem of\u00a0<em>Cucurbita pepo<\/em>. From the right to the left we find vessels with different lignin thickening of the walls: annular vessel (va), spiral vessel (vs) and punctuated vessel (vp). On the left two phloem sieve tubes (tc) with sieve plates (red arrows).<br \/>The second microphotograph shows\u00a0part of a longitudinal section, stained with tlouidine blue, at the level of xylem in a young<em>\u00a0Zea mays<\/em>\u00a0shoot.\u00a0vs : spiral vessel; vp : punctuated vessel\u00a0<\/p><p style=\"margin-top: 15px; margin-bottom: 15px; line-height: 25.2px; color: #404040; font-family: arial; font-size: 14px; font-style: normal; font-weight: 400;\"><img fetchpriority=\"high\" decoding=\"async\" style=\"border-width: 0px; border-style: initial; display: block; margin-left: auto; margin-right: auto;\" src=\"https:\/\/www.unige.ch\/sciences\/biologie\/bioveg\/crevecoeur\/files\/cache\/bafc9a5ca5ff555647d1179b6bc9273a_f515.jpg\" alt=\"Sie Coupe longit Cucurbita.jpg\" width=\"700\" height=\"462\" \/><\/p><p style=\"margin-top: 15px; margin-bottom: 15px; line-height: 25.2px; color: #404040; font-family: arial; font-size: 14px; font-style: normal; font-weight: 400;\"><img decoding=\"async\" style=\"border-width: 0px; border-style: initial; display: block; margin-left: auto; margin-right: auto;\" src=\"https:\/\/www.unige.ch\/sciences\/biologie\/bioveg\/crevecoeur\/files\/cache\/67e02d594df540476249882f5c7cd59e_f514.jpg\" alt=\"Site coupe longit zea.jpg\" width=\"700\" height=\"492\" \/><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Microphotographs of xylem and phloem on longitudinal sections Xylem vessels and sieve tubes are easier to be recognized on longitudinal sections\u00a0than on cross sections. However cross sections give important information ontheir distribution in different organs and allow to determine in which organ a\u00a0section is made and whether it is a monocotyledon or a dicotyledon. Microphotographs\u00a0on [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"default","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":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","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-opacity":"","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-opacity":"","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-opacity":"","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-opacity":"","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-opacity":"","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-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-2853","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Xylem and phloem on longitudinal sections - Mich\u00e8le Cr\u00e8vecoeur<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/michelecrevecoeur.ch\/?page_id=2853\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Xylem and phloem on longitudinal sections - Mich\u00e8le Cr\u00e8vecoeur\" \/>\n<meta property=\"og:description\" content=\"Microphotographs of xylem and phloem on longitudinal sections Xylem vessels and sieve tubes are easier to be recognized on longitudinal sections\u00a0than on cross sections. However cross sections give important information ontheir distribution in different organs and allow to determine in which organ a\u00a0section is made and whether it is a monocotyledon or a dicotyledon. Microphotographs\u00a0on [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/michelecrevecoeur.ch\/?page_id=2853\" \/>\n<meta property=\"og:site_name\" content=\"Mich\u00e8le Cr\u00e8vecoeur\" \/>\n<meta property=\"article:modified_time\" content=\"2022-02-19T14:04:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.unige.ch\/sciences\/biologie\/bioveg\/crevecoeur\/files\/cache\/bafc9a5ca5ff555647d1179b6bc9273a_f515.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/michelecrevecoeur.ch\/?page_id=2853\",\"url\":\"https:\/\/michelecrevecoeur.ch\/?page_id=2853\",\"name\":\"Xylem and phloem on longitudinal sections - Mich\u00e8le Cr\u00e8vecoeur\",\"isPartOf\":{\"@id\":\"https:\/\/michelecrevecoeur.ch\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/michelecrevecoeur.ch\/?page_id=2853#primaryimage\"},\"image\":{\"@id\":\"https:\/\/michelecrevecoeur.ch\/?page_id=2853#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.unige.ch\/sciences\/biologie\/bioveg\/crevecoeur\/files\/cache\/bafc9a5ca5ff555647d1179b6bc9273a_f515.jpg\",\"datePublished\":\"2022-02-19T14:04:33+00:00\",\"dateModified\":\"2022-02-19T14:04:56+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/michelecrevecoeur.ch\/?page_id=2853#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/michelecrevecoeur.ch\/?page_id=2853\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/michelecrevecoeur.ch\/?page_id=2853#primaryimage\",\"url\":\"https:\/\/www.unige.ch\/sciences\/biologie\/bioveg\/crevecoeur\/files\/cache\/bafc9a5ca5ff555647d1179b6bc9273a_f515.jpg\",\"contentUrl\":\"https:\/\/www.unige.ch\/sciences\/biologie\/bioveg\/crevecoeur\/files\/cache\/bafc9a5ca5ff555647d1179b6bc9273a_f515.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/michelecrevecoeur.ch\/?page_id=2853#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/michelecrevecoeur.ch\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Xylem and phloem on longitudinal sections\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/michelecrevecoeur.ch\/#website\",\"url\":\"https:\/\/michelecrevecoeur.ch\/\",\"name\":\"Mich\u00e8le Cr\u00e8vecoeur\",\"description\":\"Plant Microscopy\",\"publisher\":{\"@id\":\"https:\/\/michelecrevecoeur.ch\/#\/schema\/person\/dfdf9ef4c6d746dfdecdceb6e2986d66\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/michelecrevecoeur.ch\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\/\/michelecrevecoeur.ch\/#\/schema\/person\/dfdf9ef4c6d746dfdecdceb6e2986d66\",\"name\":\"Mich\u00e8le\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/secure.gravatar.com\/avatar\/5ad72d9990ca501b7348a22de838f81a21f31163f3372e910adcb88b005c4cca?s=96&d=mm&r=g\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/5ad72d9990ca501b7348a22de838f81a21f31163f3372e910adcb88b005c4cca?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/5ad72d9990ca501b7348a22de838f81a21f31163f3372e910adcb88b005c4cca?s=96&d=mm&r=g\",\"caption\":\"Mich\u00e8le\"},\"logo\":{\"@id\":\"https:\/\/secure.gravatar.com\/avatar\/5ad72d9990ca501b7348a22de838f81a21f31163f3372e910adcb88b005c4cca?s=96&d=mm&r=g\"},\"sameAs\":[\"http:\/\/michelecrevecoeur.ch\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Xylem and phloem on longitudinal sections - Mich\u00e8le Cr\u00e8vecoeur","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/michelecrevecoeur.ch\/?page_id=2853","og_locale":"fr_FR","og_type":"article","og_title":"Xylem and phloem on longitudinal sections - Mich\u00e8le Cr\u00e8vecoeur","og_description":"Microphotographs of xylem and phloem on longitudinal sections Xylem vessels and sieve tubes are easier to be recognized on longitudinal sections\u00a0than on cross sections. 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