{"id":3305,"date":"2025-01-06T09:24:09","date_gmt":"2025-01-06T08:24:09","guid":{"rendered":"https:\/\/wp.unil.ch\/emf\/?p=3305"},"modified":"2025-01-06T10:08:50","modified_gmt":"2025-01-06T09:08:50","slug":"regulation-and-function-of-a-polarly-localized-lignin-barrier-in-the-exodermis","status":"publish","type":"post","link":"https:\/\/wp.unil.ch\/emf\/regulation-and-function-of-a-polarly-localized-lignin-barrier-in-the-exodermis\/","title":{"rendered":""},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li><strong>Regulation and function of a polarly localized lignin barrier in the exodermis<\/strong><\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Concepcion-Manzano-Aff1-Aff2\">Concepcion Manzano<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Kevin_W_-Morimoto-Aff1\">Kevin W. Morimoto<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Lidor-Shaar_Moshe-Aff1-Aff3\">Lidor Shaar-Moshe<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-G__Alex-Mason-Aff1\">G. Alex Mason<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Alex-Cant__Pastor-Aff1\">Alex Cant\u00f3-Pastor<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Mona-Gouran-Aff1\">Mona Gouran<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Damien-Bellis-Aff4-Aff5\">Damien De Bellis<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Robertas-Ursache-Aff4-Aff6\">Robertas Ursache<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Kaisa-Kajala-Aff1-Aff7\">Kaisa Kajala<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Neelima-Sinha-Aff8\">Neelima Sinha<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Julia-Bailey_Serres-Aff9\">Julia Bailey-Serres<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Niko-Geldner-Aff4\">Niko Geldner<\/a>,&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-J__Carlos-Pozo-Aff2\">J. Carlos del Pozo<\/a>&nbsp;&amp;&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/www.nature.com\/articles\/s41477-024-01864-z#auth-Siobhan_M_-Brady-Aff1-Aff10\">Siobhan M. Brady<\/a>&nbsp;<\/li>\n<\/ul>\n\n\n\n<p><a href=\"https:\/\/www.nature.com\/nplants\"><em>Nature Plants<\/em><\/a>&nbsp;(2024)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Abs1\">Abstract<\/h2>\n\n\n\n<p>Multicellular organisms control environmental interactions through specialized barriers in specific cell types. A conserved barrier in plant roots is the endodermal Casparian strip (CS), a ring-like structure made of polymerized lignin that seals the endodermal apoplastic space. Most angiosperms have another root cell type, the exodermis, that is reported to form a barrier. Our understanding of exodermal developmental and molecular regulation and function is limited as this cell type is absent from&nbsp;<em>Arabidopsis thaliana<\/em>. We demonstrate that in tomato (<em>Solanum lycopersicum<\/em>), the exodermis does not form a CS. Instead, it forms a polar lignin cap (PLC) with equivalent barrier function to the endodermal CS but distinct genetic control. Repression of the exodermal PLC in inner cortical layers is conferred by the&nbsp;<em>SlSCZ<\/em>&nbsp;and&nbsp;<em>SlEXO1<\/em>&nbsp;transcription factors, and these two factors genetically interact to control its polar deposition. Several target genes that act downstream of&nbsp;<em>SlSCZ<\/em>&nbsp;and&nbsp;<em>SlEXO1<\/em>&nbsp;in the exodermis are identified. Although the exodermis and endodermis produce barriers that restrict mineral ion uptake, the exodermal PLC is unable to fully compensate for the lack of a CS. The presence of distinct lignin structures acting as apoplastic barriers has exciting implications for a root\u2019s response to abiotic and biotic stimuli.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"648\" height=\"775\" src=\"https:\/\/wp.unil.ch\/emf\/files\/2025\/01\/image.png\" alt=\"\" class=\"wp-image-3306\" srcset=\"https:\/\/wp.unil.ch\/emf\/files\/2025\/01\/image.png 648w, https:\/\/wp.unil.ch\/emf\/files\/2025\/01\/image-251x300.png 251w\" sizes=\"auto, (max-width: 648px) 100vw, 648px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Nature Plants&nbsp;(2024) Abstract Multicellular organisms control environmental interactions through specialized barriers in specific cell types. A conserved barrier in plant roots is the endodermal Casparian strip (CS), a ring-like structure &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/wp.unil.ch\/emf\/regulation-and-function-of-a-polarly-localized-lignin-barrier-in-the-exodermis\/\" class=\"more-link\">Continuer la lecture<span class=\"screen-reader-text\"> de &laquo;&nbsp;&nbsp;&raquo;<\/span><\/a><\/p>\n","protected":false},"author":1002250,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"aside","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-3305","post","type-post","status-publish","format-aside","category-uncategorized","post_format-post-format-aside"],"_links":{"self":[{"href":"https:\/\/wp.unil.ch\/emf\/wp-json\/wp\/v2\/posts\/3305","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.unil.ch\/emf\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.unil.ch\/emf\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/emf\/wp-json\/wp\/v2\/users\/1002250"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/emf\/wp-json\/wp\/v2\/comments?post=3305"}],"version-history":[{"count":4,"href":"https:\/\/wp.unil.ch\/emf\/wp-json\/wp\/v2\/posts\/3305\/revisions"}],"predecessor-version":[{"id":3321,"href":"https:\/\/wp.unil.ch\/emf\/wp-json\/wp\/v2\/posts\/3305\/revisions\/3321"}],"wp:attachment":[{"href":"https:\/\/wp.unil.ch\/emf\/wp-json\/wp\/v2\/media?parent=3305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.unil.ch\/emf\/wp-json\/wp\/v2\/categories?post=3305"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.unil.ch\/emf\/wp-json\/wp\/v2\/tags?post=3305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}