{"id":6080,"date":"2025-10-08T15:43:00","date_gmt":"2025-10-08T13:43:00","guid":{"rendered":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/?p=6080"},"modified":"2025-11-03T18:25:53","modified_gmt":"2025-11-03T16:25:53","slug":"dismoipourquoi-les-plantes-sont-vertes","status":"publish","type":"post","link":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/2025\/10\/08\/dismoipourquoi-les-plantes-sont-vertes\/","title":{"rendered":"#DisMoiPourquoi les plantes sont vertes ?"},"content":{"rendered":"<div class=\"intext\"> Gabriel, 8 ans, en CE2 \u00e0 l\u2019\u00e9cole les Salins \u00e0 Hy\u00e8res\n              <\/div>\n<div class=\"paragraph\">\n<p>Pour r\u00e9pondre \u00e0 cette question, il faut commencer par parler du rayonnement solaire. Celui-ci est compos\u00e9 de diff\u00e9rentes &#8220;ondes&#8221; \u00e9mises par le soleil, dont certaines sont visibles par les humains sous forme de couleurs, alors que d\u2019autres leur sont invisibles (par exemple les ultraviolets). Chaque onde correspond aussi \u00e0 de l\u2019\u00e9nergie. Les feuilles des plantes contiennent des compos\u00e9s chimiques appel\u00e9s &#8220;pigments chlorophylliens&#8221; qui absorbent les ondes du rayonnement solaire&#8230; mais seulement la moiti\u00e9 de celles qui correspondent \u00e0 la couleur verte. Ces &#8220;ondes vertes&#8221; n\u2019\u00e9tant pas retenues dans les feuilles, elles sont r\u00e9fl\u00e9chies&#8230; et nous pouvons donc les voir\u00a0! Voil\u00e0 pourquoi les feuilles nous apparaissent vertes. Ce que les feuilles font avec les ondes capt\u00e9es\u00a0? Elles se servent de leur \u00e9nergie pour r\u00e9aliser la photosynth\u00e8se, un processus qui transforme l\u2019\u00e9nergie lumineuse en \u00e9nergie chimique puis en sucre, utilis\u00e9 par la plante pour se d\u00e9velopper.\u00a0\u00bb<\/p>\n<p><b>Sophie Gachet, ma\u00eetre de conf\u00e9rences \u00e0 l\u2019Institut m\u00e9diterran\u00e9en de biodiversit\u00e9 et d\u2019\u00e9cologie marine et continentale (CNRS, IRD)<\/b><\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"Pour r&eacute;pondre &agrave; cette question, il faut commencer par parler du rayonnement solaire. Celui-ci est compos&eacute; de diff&eacute;rentes &#8220;ondes&#8221; &eacute;mises par le soleil, dont certaines sont visibles par les humains sous forme de &#8230;","protected":false},"author":1,"featured_media":6081,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[333],"tags":[2543,84,1434,2618,27,172,353,2754,31],"news-destination":[],"news-source":[475],"is_homepage":[],"ta_other":[],"class_list":["post-6080","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environnement","tag-dismoipourquoi","tag-biodiversite","tag-ecologie","tag-ecosysteme","tag-hyeres","tag-les-petits-debrouillards","tag-sciences","tag-sophie-gachet","tag-var","news-source-website"],"_links":{"self":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts\/6080","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/comments?post=6080"}],"version-history":[{"count":6,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts\/6080\/revisions"}],"predecessor-version":[{"id":9714,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts\/6080\/revisions\/9714"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/media\/6081"}],"wp:attachment":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/media?parent=6080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/categories?post=6080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/tags?post=6080"},{"taxonomy":"news-destination","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/news-destination?post=6080"},{"taxonomy":"news-source","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/news-source?post=6080"},{"taxonomy":"is_homepage","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/is_homepage?post=6080"},{"taxonomy":"ta_other","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/ta_other?post=6080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}