{"id":2696,"date":"2022-02-15T18:13:00","date_gmt":"2022-02-15T17:13:00","guid":{"rendered":"https:\/\/michelecrevecoeur.ch\/?page_id=2696"},"modified":"2022-02-27T15:13:29","modified_gmt":"2022-02-27T14:13:29","slug":"xylem-and-phloem-in-young-stems","status":"publish","type":"page","link":"https:\/\/michelecrevecoeur.ch\/?page_id=2696","title":{"rendered":"xylem and phloem in young stems"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2696\" class=\"elementor elementor-2696\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-78341387 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"78341387\" 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-571d1197\" data-id=\"571d1197\" 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-453e53a7 elementor-widget elementor-widget-text-editor\" data-id=\"453e53a7\" 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><strong style=\"text-align: center; color: var( --e-global-color-text );\"><span lang=\"EN-US\" style=\"color: navy;\"><span style=\"font-style: inherit;\">Xylem and phloem in young stems<\/span><br \/><\/span><\/strong><em style=\"font-weight: inherit; color: var( --e-global-color-text );\"><b><span lang=\"EN-US\" style=\"color: navy;\">Aristolochia rotunda, Zea mays et Asparagus.<\/span><\/b><\/em><b><span lang=\"EN-US\" style=\"font-size: 13.5pt; color: navy;\"><!-- [if !supportLineBreakNewLine]--><!--[endif]--><\/span><\/b><\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-df0b75a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"df0b75a\" 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-dd79810\" data-id=\"dd79810\" 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-f753c1d elementor-widget elementor-widget-text-editor\" data-id=\"f753c1d\" 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: 11.25pt 0cm; line-height: 18.9pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\"><span lang=\"EN-US\" style=\"font-size: 10.5pt; font-family: 'Arial',sans-serif; color: #404040; mso-ansi-language: EN-US;\">In young stems, both dicotyledons and monocotyledons, xylem and phloem are collateral with xylem towards center of the organ and phloem towards outside. This is clearly seen on cross sections as illustrated below.<br \/><\/span><span lang=\"EN-US\" style=\"font-style: inherit; font-weight: inherit; font-size: 10.5pt; font-family: Arial, sans-serif; color: #404040;\">1\/ Example in a young stem of Aristoloche (dicotyledon). <\/span><span style=\"color: #404040; font-family: Arial, sans-serif; font-size: 10.5pt; font-style: inherit; font-weight: inherit;\">On the left detail of a vascular bundle on which this distribution is clearly seen. At the xylem level we distinguish the protoxylem (px) that consists of vessels of small diameter at the center and metaxylem (mx) composed of larger vessels. Their distribution has the appearance of an isosceles triangle with the protoxylem oriented toward the pith. <span lang=\"EN-US\" style=\"font-style: inherit; font-weight: inherit; font-size: 10.5pt; font-family: Arial, sans-serif; color: #404040;\"> See also the page :<\/span><a href=\"https:\/\/michelecrevecoeur.ch\/?page_id=1400\"><span style=\"font-style: inherit; font-weight: inherit; font-family: var( --e-global-typography-text-font-family ), Sans-serif; color: black;\"><span lang=\"EN-US\" style=\"font-size: 10.5pt; font-family: Arial, sans-serif;\"><em> Aristolochia r.<\/em> stem<\/span><\/span><\/a><\/span><\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6f1274b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6f1274b\" 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-d004c09\" data-id=\"d004c09\" 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-64dfa8f elementor-widget elementor-widget-image\" data-id=\"64dfa8f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"605\" height=\"346\" src=\"https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-1.jpg\" class=\"attachment-large size-large wp-image-2699\" alt=\"\" srcset=\"https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-1.jpg 605w, https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-1-300x172.jpg 300w\" sizes=\"(max-width: 605px) 100vw, 605px\" \/>\t\t\t\t\t\t\t\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2389a9e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2389a9e\" 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-0b2e700\" data-id=\"0b2e700\" 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-839c5ae elementor-widget elementor-widget-text-editor\" data-id=\"839c5ae\" 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><span lang=\"EN-US\" style=\"font-size: 10.5pt; line-height: 107%; font-family: 'Arial',sans-serif; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; color: #404040; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;\">2\/ Example in a young of <i>Zea mays<\/i> a monocotyledon.<\/span><span style=\"font-style: inherit; font-weight: inherit; font-family: var( --e-global-typography-text-font-family ), Sans-serif;\">The superposition of xylem and phloem is less evident due to the V distribution of xylem and the phloem between arms formed by xylem (X). \u00a0A few fibers (green) are observed at both extremities of the bundle. As result of elongation of internode, the most centered xylem is distended, and its primary wall disappears. This results in formation of a lacuna (l).\u00a0 See also the page : \u00a0\u00a0\u00bb <a href=\"https:\/\/michelecrevecoeur.ch\/?page_id=1415\">Stem of <em>Zea mays<\/em>\u00ab\u00a0.<\/a><\/span><\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-911e06a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"911e06a\" 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-7fe2861\" data-id=\"7fe2861\" 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-c755049 elementor-widget elementor-widget-image\" data-id=\"c755049\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"768\" height=\"590\" src=\"https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-2-768x590.jpg\" class=\"attachment-medium_large size-medium_large wp-image-2710\" alt=\"\" srcset=\"https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-2-768x590.jpg 768w, https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-2-300x231.jpg 300w, https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-2-1024x787.jpg 1024w, https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-2-1536x1180.jpg 1536w, https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-2.jpg 1788w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-42ea996 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"42ea996\" 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-a7b7f02\" data-id=\"a7b7f02\" 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-516d9b9 elementor-widget elementor-widget-text-editor\" data-id=\"516d9b9\" 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: 11.25pt 0cm; line-height: 18.9pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\"><span lang=\"EN-US\" style=\"font-size: 10.5pt; font-family: 'Arial',sans-serif; color: #404040; mso-ansi-language: EN-US;\">The distribution of primary xylem and phloem is also illustrated on a cross section in a stem of<em> Asparagus<\/em>, another monocotyledon. <\/span>\u00a0<span lang=\"EN-US\" style=\"font-size: 10.5pt; font-family: 'Arial',sans-serif; color: #404040; mso-ansi-language: EN-US;\">As in <i>Zea mays<\/i> stem a V distribution of xylem is observed, two large xylem vessels , the metaxylem (mx) vessels located towards the periphery of the organ outside and the protoxylem (px) vessels are located towards center. See also the page : <a href=\"https:\/\/michelecrevecoeur.ch\/?page_id=1426\"><em>Asparagus <\/em>stem<\/a><\/span><\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2167a36 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2167a36\" 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-877acbe\" data-id=\"877acbe\" 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-91e447a elementor-widget elementor-widget-image\" data-id=\"91e447a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"605\" height=\"261\" src=\"https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-3.jpg\" class=\"attachment-large size-large wp-image-2701\" alt=\"\" srcset=\"https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-3.jpg 605w, https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2022\/02\/xylem-phloem-in-stem-3-300x129.jpg 300w\" sizes=\"(max-width: 605px) 100vw, 605px\" \/>\t\t\t\t\t\t\t\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>Xylem and phloem in young stemsAristolochia rotunda, Zea mays et Asparagus. In young stems, both dicotyledons and monocotyledons, xylem and phloem are collateral with xylem towards center of the organ and phloem towards outside. This is clearly seen on cross sections as illustrated below.1\/ Example in a young stem of Aristoloche (dicotyledon). On the left [&hellip;]<\/p>\n","protected":false},"author":1,"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-2696","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>xylem and phloem in young stems - 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=2696\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"xylem and phloem in young stems - Mich\u00e8le Cr\u00e8vecoeur\" \/>\n<meta property=\"og:description\" content=\"Xylem and phloem in young stemsAristolochia rotunda, Zea mays et Asparagus. In young stems, both dicotyledons and monocotyledons, xylem and phloem are collateral with xylem towards center of the organ and phloem towards outside. This is clearly seen on cross sections as illustrated below.1\/ Example in a young stem of Aristoloche (dicotyledon). 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In young stems, both dicotyledons and monocotyledons, xylem and phloem are collateral with xylem towards center of the organ and phloem towards outside. This is clearly seen on cross sections as illustrated below.1\/ Example in a young stem of Aristoloche (dicotyledon). 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