{"id":69413,"date":"2025-06-29T12:00:00","date_gmt":"2025-06-29T12:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/senegal\/politique\/arbre-jurassique-de-200-millions-dannees-en-bretagne"},"modified":"2025-06-29T19:53:51","modified_gmt":"2025-06-29T19:53:51","slug":"arbre-jurassique-de-200-millions-dannees-en-bretagne","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/arbre-jurassique-de-200-millions-dannees-en-bretagne","title":{"rendered":"Arbre Jurassique de 200 Millions D\u2019ann\u00e9es en Bretagne"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Senegal. <\/strong><\/span>A Saint-Jacut-les-Pins, dans le Morbihan, au c\u0153ur du \u00ab Jardin du Jurassique \u00bb du Tropical Parc, l\u2019un des pins Wollemia nobilis a produit des co\u0302nes ma\u0302les et femelles, e\u0301tape indispensable a\u0300 sa reproduction sexue\u0301e. Une premie\u0300re mondiale en dehors de son Australie natale, a\u0300 l\u2019exception des Jardins botaniques royaux de Kew, au Royaume-Uni.<\/p>\n<p><b>Un arbre du temps des dinosaures<\/b><\/p>\n<p>De\u0301couvert seulement en 1994 dans une gorge secre\u0300te des Blue Mountains, non loin de Sydney, Wollemia nobilis est un conife\u0300re que l\u2019on croyait e\u0301teint depuis des millions d\u2019anne\u0301es. Il appartient a\u0300 la famille des Araucariace\u0301es, tre\u0300s re\u0301pandue au Me\u0301sozoi\u0308que, et formait autrefois des fore\u0302ts ou\u0300 se sont aventure\u0301s les dinosaures. Les fossiles te\u0301moignent de son existence depuis au moins 200 millions d\u2019anne\u0301es, mais seules quelques dizaines de spe\u0301cimens adultes subsistent aujourd\u2019hui a\u0300 l\u2019e\u0301tat sauvage. Face a\u0300 ce danger d\u2019extinction, une ope\u0301ration de propagation contro\u0302le\u0301e a e\u0301te\u0301 lance\u0301e dans plusieurs institutions botaniques du monde, dont Tropical Parc. Un signal encourageant pour la survie de l\u2019espe\u0300ce.<\/p>\n<p>Plante\u0301s en 2010 dans une parcelle ombrage\u0301e, acide et bien draine\u0301e, les pins bretons ont visiblement trouve\u0301 leur e\u0301quilibre dans le climat doux et humide du sud de la Bretagne. Le cycle de fructification, tre\u0300s lent, s\u2019est enclenche\u0301 progressivement, sous la vigilance du jardinier en chef Erven Gicquel. Quinze ans apre\u0300s la plantation, les premiers co\u0302nes reproducteurs apparaissent: d\u2019abord ma\u0302les, puis femelles, ce qui permet potentiellement la production de graines fertiles. \u00ab C\u2019est la premie\u0300re fois qu\u2019un tel phe\u0301nome\u0300ne est observe\u0301 naturellement hors de son biotope australien \u00bb, souligne Pedro Viegas, docteur en pale\u0301ontologie associe\u0301 au parc.<\/p>\n<p><b>Favoriser la reproduction sexue\u0301e pour sauver l\u2019espe\u0300ce<\/b><\/p>\n<p>Les co\u0302nes, qui mettent plusieurs mois a\u0300 mu\u0302rir, devraient livrer leurs graines d\u2019ici la fin du printemps 2026. Une partie sera cultive\u0301e sous serre pour cre\u0301er de nouveaux plants ; certains pourraient e\u0302tre distribue\u0301s au grand public dans un de\u0301lai de 18 a\u0300 24 mois. Si les graines s\u2019ave\u0300rent viables, cela repre\u0301sentera un pas important vers une re\u0301ge\u0301ne\u0301ration plus large de cette espe\u0300ce en danger critique d\u2019extinction (selon la classification de l\u2019UICN). En favorisant la reproduction sexue\u0301e pluto\u0302t que clonale, les scientifiques espe\u0300rent restaurer une diversite\u0301 ge\u0301ne\u0301tique qui ame\u0301liorerait la re\u0301silience du Wollemia face aux maladies et au changement climatique.<\/p>\n<p>En paralle\u0300le, le parc a inaugure\u0301 une nouvelle salle pe\u0301dagogique consacre\u0301e a\u0300 la pale\u0301ontologie, conc\u0327ue par Pedro Viegas. Reconstitutions de dinosaures grandeur nature, fossiles rares, jeux interactifs et mapping vide\u0301o permettent de replacer cette fructification dans une histoire plus large, celle de l\u2019e\u0301volution des ve\u0301ge\u0301taux et de la vie sur Terre depuis le Jurassique.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <span style=\"color: #ff6600\">Senegal<\/span>, suivez <span style=\"color: #ff6600\">Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Senegal. A Saint-Jacut-les-Pins, dans le Morbihan, au c\u0153ur du \u00ab Jardin du Jurassique \u00bb du Tropical Parc, l\u2019un des pins Wollemia nobilis a produit des co\u0302nes ma\u0302les et femelles, e\u0301tape indispensable a\u0300 sa reproduction sexue\u0301e. Une premie\u0300re mondiale en dehors de son Australie natale, a\u0300 l\u2019exception des Jardins botaniques royaux de Kew, au [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":69412,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[44],"class_list":["post-69413","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-senegal-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Arbre Jurassique de 200 Millions D\u2019ann\u00e9es en Bretagne - Senegal<\/title>\n<meta name=\"description\" content=\"A Saint-Jacut-les-Pins, dans le Morbihan, au c\u0153ur du \u00ab Jardin du Jurassique \u00bb du Tropical Parc, l\u2019un des pins Wollemia n ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/arbre-jurassique-de-200-millions-dannees-en-bretagne\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Arbre Jurassique de 200 Millions D\u2019ann\u00e9es en Bretagne\" \/>\n<meta property=\"og:description\" content=\"A Saint-Jacut-les-Pins, dans le Morbihan, au c\u0153ur du \u00ab Jardin du Jurassique \u00bb du Tropical Parc, l\u2019un des pins Wollemia n ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/arbre-jurassique-de-200-millions-dannees-en-bretagne\" \/>\n<meta property=\"og:site_name\" content=\"Senegal\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-29T12:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-29T19:53:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1751213935.860408.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"899\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/arbre-jurassique-de-200-millions-dannees-en-bretagne#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/arbre-jurassique-de-200-millions-dannees-en-bretagne\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Arbre Jurassique de 200 Millions D\u2019ann\u00e9es en Bretagne\",\"datePublished\":\"2025-06-29T12:00:00+00:00\",\"dateModified\":\"2025-06-29T19:53:51+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/arbre-jurassique-de-200-millions-dannees-en-bretagne\"},\"wordCount\":524,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/arbre-jurassique-de-200-millions-dannees-en-bretagne#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/06\/sm_1751213935.860408.jpg\",\"keywords\":[\"Senegal\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/arbre-jurassique-de-200-millions-dannees-en-bretagne#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/arbre-jurassique-de-200-millions-dannees-en-bretagne\",\"url\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/arbre-jurassique-de-200-millions-dannees-en-bretagne\",\"name\":\"Arbre Jurassique de 200 Millions D\u2019ann\u00e9es en Bretagne - 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