{"id":90,"date":"2025-09-01T19:38:29","date_gmt":"2025-09-01T19:38:29","guid":{"rendered":"https:\/\/deliry.com\/svt\/?p=90"},"modified":"2025-09-02T00:48:57","modified_gmt":"2025-09-02T00:48:57","slug":"adne-ou-adn-environnemental","status":"publish","type":"post","link":"https:\/\/deliry.com\/svt\/adne-ou-adn-environnemental\/","title":{"rendered":"ADNe ou ADN environnemental"},"content":{"rendered":"\n<p>L&rsquo;ADN environnemental est de l&rsquo;ADN d&rsquo;origine animale, v\u00e9g\u00e9tale, issue de champignons, bact\u00e9ries ou virus perdu dans l&rsquo;environnement donc par des \u00eatres vivants ou des Virus. Il est produit par exemple par les excr\u00e9ments, l&rsquo;urine, les cellules perdues, le sang ou les cadavres. On peut ainsi r\u00e9colter de l&rsquo;ADN soit ancien (s\u00e9diments relativement r\u00e9cents, perg\u00e9lisols, glace\u2026) ou actuel (eau, sols, substrats\u2026), l&rsquo;extraire et l&rsquo;amplifier. A chaque \u00e9tape s&rsquo;opposent des difficult\u00e9s li\u00e9es notamment \u00e0 la d\u00e9gradation des mol\u00e9cules par des enzymes ou les temp\u00e9ratures \u00e9lev\u00e9es, des contaminations possibles. L&rsquo;ADN disponible est alors s\u00e9quenc\u00e9 par des m\u00e9thode modernes, rapides et peu co\u00fbteuses et analys\u00e9 selon des banques de donn\u00e9es de r\u00e9f\u00e9rence.<\/p>\n\n\n\n<p>Cette m\u00e9thode permet de :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>d\u00e9terminer les esp\u00e8ces pr\u00e9sentes dans l&rsquo;environnement,<\/li>\n\n\n\n<li>analyser des r\u00e9gimes alimentaires,<\/li>\n\n\n\n<li>faire une estimation de la Biodiversit\u00e9,<\/li>\n\n\n\n<li>estimer l&rsquo;abondance de certaines esp\u00e8ces.<\/li>\n\n\n\n<li>\u2026<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"683\" height=\"620\" src=\"https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/09\/Adnenvironnemental.png\" alt=\"\" class=\"wp-image-91\" srcset=\"https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/09\/Adnenvironnemental.png 683w, https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/09\/Adnenvironnemental-300x272.png 300w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><figcaption class=\"wp-element-caption\">\u00a9\u00a9 byncsa &#8211; Paul Castagn\u00e9 et Garance Castino<\/figcaption><\/figure><\/div>\n\n\n<p>On a r\u00e9ussi \u00e0 extraire et identifier de l&rsquo;ADN dans des s\u00e9diments vieux de 200000 ans. Dans ce cas l&rsquo;ADN est tr\u00e8s alt\u00e9r\u00e9, mais fourni toutefois une grande quantit\u00e9 d&rsquo;informations. Le principal d\u00e9faut de la m\u00e9thode est le risque de contamination de l&rsquo;ADN par des apports non souhait\u00e9s.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;ADN environnemental est de l&rsquo;ADN d&rsquo;origine animale, v\u00e9g\u00e9tale, issue de champignons, bact\u00e9ries ou virus perdu dans l&rsquo;environnement donc par des \u00eatres vivants ou des Virus. Il est produit par exemple par les excr\u00e9ments, l&rsquo;urine, les cellules perdues, le sang ou les cadavres. On peut ainsi r\u00e9colter de l&rsquo;ADN soit ancien (s\u00e9diments relativement r\u00e9cents, perg\u00e9lisols, glace\u2026)&#8230;<\/p>\n","protected":false},"author":1,"featured_media":79,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[4,8],"tags":[],"class_list":["post-90","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-adn","category-biodiversite"],"_links":{"self":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/posts\/90","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/comments?post=90"}],"version-history":[{"count":1,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/posts\/90\/revisions"}],"predecessor-version":[{"id":92,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/posts\/90\/revisions\/92"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/media\/79"}],"wp:attachment":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/media?parent=90"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/categories?post=90"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/tags?post=90"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}