{"id":9250,"date":"2023-09-18T09:10:18","date_gmt":"2023-09-18T07:10:18","guid":{"rendered":"http:\/\/srhgx.be\/wordpress\/?p=9250"},"modified":"2025-05-26T09:50:41","modified_gmt":"2025-05-26T07:50:41","slug":"pneumatophores","status":"publish","type":"post","link":"http:\/\/srhgx.be\/wordpress\/pneumatophores\/","title":{"rendered":"Pneumatophores"},"content":{"rendered":"\n<p class=\"has-nv-dark-bg-color has-text-color has-medium-font-size\">Dans le parc de Bierbais \u00e0 1435 Mont-Saint-Guibert<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"605\" height=\"454\" src=\"http:\/\/srhgx.be\/wordpress\/wp-content\/uploads\/2023\/09\/image-9.png\" alt=\"\" class=\"wp-image-9251\" srcset=\"http:\/\/srhgx.be\/wordpress\/wp-content\/uploads\/2023\/09\/image-9.png 605w, http:\/\/srhgx.be\/wordpress\/wp-content\/uploads\/2023\/09\/image-9-300x225.png 300w, http:\/\/srhgx.be\/wordpress\/wp-content\/uploads\/2023\/09\/image-9-200x150.png 200w\" sizes=\"(max-width: 605px) 100vw, 605px\" \/><\/figure>\n\n\n\n<p>Merci \u00e0 M-L V pour la photo<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"http:\/\/srhgx.be\/wordpress\/wp-content\/uploads\/2023\/09\/image-10.png\" alt=\"\" class=\"wp-image-9252\" style=\"width:287px;height:381px\" width=\"287\" height=\"381\"\/><\/figure>\n\n\n\n<p>Pneumatophores d\u2019un <strong>Taxodium ascendens &lsquo;nutans&rsquo;<\/strong> (Cypr\u00e8s des \u00e9tangs).<\/p>\n\n\n\n<p>Un pneumatophore est une excroissance verticale produite par la racine de certains arbres poussant dans l&rsquo;eau ou dans des sols gorg\u00e9s d&rsquo;eau, et qui, \u00e9mergeant \u00e0 l&rsquo;air libre, assure les \u00e9changes gazeux respiratoires de la partie immerg\u00e9e de la plante.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><a href=\"https:\/\/fr.wikipedia.org\/wiki\/Pneumatophore\">https:\/\/fr.wikipedia.org\/wiki\/Pneumatophore<\/a> <\/p>\n\n\n\n<p>En botanique, un <strong>pneumatophore, c\u2019est une excroissance a\u00e9rienne des racines de certains arbres vivant dans des zones humides (marais, mar\u00e9cage, mangrove,&nbsp;etc.).<\/strong><\/p>\n\n\n\n<p>L\u2019excroissance est en arceaux ou verticale (g\u00e9otropisme n\u00e9gatif), semblable \u00e0 un genou. Elle \u00e9merge souvent de l&rsquo;eau.<\/p>\n\n\n\n<p><strong>Leur fonction est probablement d&rsquo;apporter de l&rsquo;oxyg\u00e8ne aux racines immerg\u00e9es et d&rsquo;am\u00e9liorer la fixation de l&rsquo;arbre dans le sol instable et boueux du marais<\/strong>. L&rsquo;apport d&rsquo;oxyg\u00e8ne se ferait notamment \u00e0 partir des lenticelles qui recouvrent certains pneumatophores. Elles absorbent l&rsquo;air dans leurs tissus spongieux et les transmettent \u00e0 la plante par pression osmotique.<\/p>\n\n\n\n<p>Exemples d\u2019arbres produisant des pneumatophores&nbsp;:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cypr\u00e8s chinois des marais<\/strong> <em>(Glyptostrobus pensilis)<\/em>&nbsp;;<\/li>\n\n\n\n<li><strong>Cypr\u00e8s chauve<\/strong> <em>(Taxodium distichum)<\/em>&nbsp;;<\/li>\n\n\n\n<li><strong>Cypr\u00e8s des \u00e9tangs<\/strong> <em>(Taxodium ascendens)<\/em>&nbsp;;<\/li>\n\n\n\n<li>les <strong><a href=\"https:\/\/fr.wikipedia.org\/wiki\/Pal%C3%A9tuvier\">pal\u00e9tuviers<\/a><\/strong>, <strong>Avicennia germinans<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>La plupart des pneumatophores ne d\u00e9passent pas <strong>30&nbsp;centim\u00e8tres de haut<\/strong>. Mais ils peuvent parfois atteindre <strong>3&nbsp;m\u00e8tres<\/strong>.<\/p>\n\n\n\n<p>Il y a <strong>quatre types de pneumatophore<\/strong>&nbsp;: \u00e9chasse, droit, en arceau et en ruban.<\/p>\n<div style=\"display:flex; gap:10px;justify-content:center\" class=\"wps-pgfw-pdf-generate-icon__wrapper-frontend\">\n\t\t<a  href=\"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/posts\/9250?action=genpdf&amp;id=9250\" class=\"pgfw-single-pdf-download-button\" ><img src=\"http:\/\/srhgx.be\/wordpress\/wp-content\/plugins\/pdf-generator-for-wp\/admin\/src\/images\/PDF_Tray.svg\" title=\"G\u00e9n\u00e9rer un PDF\" style=\"width:auto; height:45px;\"><\/a>\n\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Dans le parc de Bierbais \u00e0 1435 Mont-Saint-Guibert Merci \u00e0 M-L V pour la photo Pneumatophores d\u2019un Taxodium ascendens &lsquo;nutans&rsquo; (Cypr\u00e8s des \u00e9tangs). Un pneumatophore est une excroissance verticale produite&hellip;&nbsp;<a href=\"http:\/\/srhgx.be\/wordpress\/pneumatophores\/\" rel=\"bookmark\">Lire la suite &raquo;<span class=\"screen-reader-text\">Pneumatophores<\/span><\/a><\/p>\n","protected":false},"author":10,"featured_media":9252,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[1],"tags":[953,954],"ppma_author":[447],"class_list":["post-9250","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-srhgx","tag-pneumatophores","tag-taxodium"],"publishpress_future_action":{"enabled":false,"date":"2026-05-05 02:36:53","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"authors":[{"term_id":447,"user_id":10,"is_guest":0,"slug":"cblancke","display_name":"Christine BLANCKE","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/973b599229553ee0b848ec49ca3de61a676ccbea8c5d03d2f477ac1a73794615?s=96&d=mm&r=g","1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/posts\/9250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/comments?post=9250"}],"version-history":[{"count":4,"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/posts\/9250\/revisions"}],"predecessor-version":[{"id":12653,"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/posts\/9250\/revisions\/12653"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/media\/9252"}],"wp:attachment":[{"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/media?parent=9250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/categories?post=9250"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/tags?post=9250"},{"taxonomy":"author","embeddable":true,"href":"http:\/\/srhgx.be\/wordpress\/wp-json\/wp\/v2\/ppma_author?post=9250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}