{"id":638,"date":"2020-03-12T17:18:58","date_gmt":"2020-03-12T16:18:58","guid":{"rendered":"https:\/\/plant-intelligence.com\/?page_id=638"},"modified":"2020-03-12T17:19:00","modified_gmt":"2020-03-12T16:19:00","slug":"la-plante-et-le-toucher","status":"publish","type":"page","link":"https:\/\/plant-intelligence.com\/index.php\/decouvertes\/la-plante-et-le-toucher\/","title":{"rendered":"La plante et le toucher"},"content":{"rendered":"\n<p><strong>Les plantes sentent quand on\nles touche. Elles font la diff\u00e9rence entre le chaud et le froid et savent quand\nle vent agite leurs branches. Elles n\u2019aiment pas le contact. <\/strong><\/p>\n\n\n\n<p><em>Quelques Exp\u00e9riences sur ce\nsujet&nbsp;: <\/em><\/p>\n\n\n\n<p><strong>Exp\u00e9rience du concombre anguleux. <\/strong>Ils sont dix fois plus sensibles que nous et per\u00e7oivent un filament pesant moins de 0,25 gramme.<\/p>\n\n\n\n<p><strong>Exp\u00e9riences Darwin, Burdon Sanderson puis plus r\u00e9cemment Volkov ( Universit\u00e9 d\u2019Oakwood en Alabama) de la dion\u00e9e attrape-mouche<\/strong> qui se nourrit non seulement de la photosynth\u00e8se, mais aussi de petits insectes et animaux. Ses feuilles se referment sur leur proie en moins d\u20191\/10<sup>\u00e8me<\/sup> de seconde, gr\u00e2ce \u00e0 l\u2019activation \u00e9lectrique provoqu\u00e9e par le toucher. On d\u00e9nombre au moins 600 sortes diff\u00e9rentes de plantes carnivores.<\/p>\n\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<div class=\"video-container\"><iframe loading=\"lazy\" title=\"frog eaten by venus flytrap\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/ymnLpQNyI6g?feature=oembed&#038;wmode=opaque\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<\/div><\/figure>\n\n\n\n<p><strong>Exp\u00e9rience du Mimosa Pudique.<\/strong> Ses feuilles se referment d\u00e8s qu\u2019on le touche, gr\u00e2ce au d\u00e9clenchement d\u2019un signal \u00e9lectrique activant au lieu des muscles, une sorte de pompe hydraulique qui gr\u00e2ce \u00e0 l\u2019action du potassium active le mouvement des feuilles.<\/p>\n\n\n\n<p><strong>Exp\u00e9rience Salisbury puis Jaffe \u00e0 la fin du XX\u00b0s sur la lampourde d\u2019orient et Braam de l\u2019universit\u00e9 Rice sur l\u2019arabette. <\/strong>Toucher une plante r\u00e9guli\u00e8rement freine ou modifie sa croissance et parfois la tue. Le vent a \u00e9galement une influence importante sur la croissance.\u00a0 Le toucher, quel qu\u2019il soit, entraine une modification rapide du programme g\u00e9n\u00e9tique de l\u2019arabette (2% des g\u00e8nes de l\u2019arabette sont activ\u00e9s lorsqu\u2019un insecte, un animal ou le vent la touche\u2026).<\/p>\n\n\n\n<p><strong>Exp\u00e9rience Bowles \u00e0 l\u2019universit\u00e9 de Leeds puis Farmer \u00e0 l\u2019Universit\u00e9 de Lausanne sur la tomate <\/strong>ne semble pas sentir la douleur (brulure, froid intense, d\u00e9chirure). Ainsi elle ne s\u2019\u00e9loigne pas du lieu de la blessure. Mais en revanche, elle communique l\u2019\u00e9v\u00e8nement au reste de la plante et d\u00e9clenchant la production d\u2019acide jasmonique, une hormone de d\u00e9fense. Pour cela, comme pour les nerfs, elle agit par impulsion \u00e9lectrique vers la tige puis les autres feuilles, mais \u00e9galement en utilisant des prot\u00e9ines ( tr\u00e8s semblables \u00e0 celles que l\u2019on trouve dans les synapses des neurones).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les plantes sentent quand on les touche. Elles font la diff\u00e9rence entre le chaud et le froid et savent quand le vent agite leurs branches. Elles n\u2019aiment pas le contact. Quelques Exp\u00e9riences sur ce&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":64,"menu_order":-1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-638","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>La plante et le toucher - Plant Intelligence<\/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:\/\/plant-intelligence.com\/index.php\/decouvertes\/la-plante-et-le-toucher\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La plante et le toucher - Plant Intelligence\" \/>\n<meta property=\"og:description\" content=\"Les plantes sentent quand on les touche. 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