{"id":526,"date":"2021-12-27T16:24:31","date_gmt":"2021-12-27T15:24:31","guid":{"rendered":"https:\/\/michelecrevecoeur.ch\/?page_id=526"},"modified":"2022-02-22T16:34:48","modified_gmt":"2022-02-22T15:34:48","slug":"pericycle","status":"publish","type":"page","link":"https:\/\/michelecrevecoeur.ch\/?page_id=526","title":{"rendered":"Pericycle"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"526\" class=\"elementor elementor-526\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-29bc15ab elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"29bc15ab\" 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-5698572c\" data-id=\"5698572c\" 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-6db0bdb5 elementor-widget elementor-widget-text-editor\" data-id=\"6db0bdb5\" 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; text-align: center; 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;\" align=\"center\"><strong><span lang=\"EN-US\" style=\"font-size: 13.5pt; color: #404040;\">Pericycle<\/span><\/strong><\/p><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; color: #404040;\">Pericycle is a primary tissue constituted of a single layer of cells that is found in young roots. It is the outermost layer of the central cylinder, layer glued against the endodermis, the innermost layer of the cortical parenchyma in the root (<\/span><span style=\"color: #404040; font-size: 14px; font-style: normal; font-weight: 400;\">\u00a0<\/span><a href=\"https:\/\/michelecrevecoeur.ch\/?page_id=871\"><span style=\"font-size: 16px; color: black;\"><span lang=\"EN-US\" style=\"font-size: 10.5pt;\">see root of <i>Iris<\/i><\/span><\/span><\/a><span lang=\"EN-US\" style=\"font-size: 10.5pt; color: #404040;\">). Cells of the pericycle are usually narrower than those of endodermis and they frequently have thin walls. Cells in front of xylem poles can divide becoming meristematic (they dedifferentiate) to produce lateral roots (also called branch roots) which must grow through the tissues of the endodermis and the cortex to reach the exterior the primary root.<\/span><\/p><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; color: #404040;\">Since the pericycle is located deep within the root the primordia of new lateral roots must break the outer layers of cells to emerge outside. Initiation of lateral roots is therefore endogenous. On the other hand, there is hormonal (auxin) regulation of their emergence.<\/span><\/p><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; color: #404040;\">Lateral roots appear at a distance from the apex variable according to the species (7 \u2013 9 cm) in the organogenesis region located above the differentiation region (root hair region). In a first time their growth is horizontal i.e., perpendicular to the main primary root. Then they curve toward the soil (positive gravitropism) and they organize in different regions as the main root: root cap, quiescent center, meristem. The xylem and phloem of each lateral root are continuous with the vascular tissues of the parent root and have the same structure.\u00a0Lateral roots participate to extension of root system to increase absorption of minerals and water.\u00a0<\/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-98805a8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"98805a8\" 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-a427172\" data-id=\"a427172\" 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-61040d3 elementor-widget elementor-widget-image\" data-id=\"61040d3\" 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<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"750\" height=\"515\" src=\"https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2021\/12\/Pericycle-lateral-roots.jpg\" class=\"attachment-large size-large wp-image-528\" alt=\"\" srcset=\"https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2021\/12\/Pericycle-lateral-roots.jpg 750w, https:\/\/michelecrevecoeur.ch\/wp-content\/uploads\/2021\/12\/Pericycle-lateral-roots-300x206.jpg 300w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Cross section in a dicotyledon root illustrating the endogenous initiation of 3 lateral roots (1,2, 3) in front of xylem poles (X).<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\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>Pericycle Pericycle is a primary tissue constituted of a single layer of cells that is found in young roots. It is the outermost layer of the central cylinder, layer glued against the endodermis, the innermost layer of the cortical parenchyma in the root (\u00a0see root of Iris). Cells of the pericycle are usually narrower than [&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-526","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>Pericycle - 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=526\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pericycle - Mich\u00e8le Cr\u00e8vecoeur\" \/>\n<meta property=\"og:description\" content=\"Pericycle Pericycle is a primary tissue constituted of a single layer of cells that is found in young roots. It is the outermost layer of the central cylinder, layer glued against the endodermis, the innermost layer of the cortical parenchyma in the root (\u00a0see root of Iris). 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