{"id":85513,"date":"2026-10-19T15:30:00","date_gmt":"2026-10-19T13:30:00","guid":{"rendered":"https:\/\/museoscienze.vda.it\/?p=85513"},"modified":"2026-10-20T09:52:55","modified_gmt":"2026-10-20T07:52:55","slug":"la-banque-de-germoplasme-vegetal-de-la-vallee-daoste","status":"publish","type":"post","link":"https:\/\/museoscienze.vda.it\/fr\/la-banque-de-germoplasme-vegetal-de-la-vallee-daoste\/","title":{"rendered":"La Banque de Germoplasme v\u00e9g\u00e9tal de la Vall\u00e9e d&rsquo;Aoste"},"content":{"rendered":"\n<p class=\"has-medium-font-size wp-block-paragraph\"><em>Des graines et des spores de plus de 80 esp\u00e8ces v\u00e9g\u00e9tales vald\u00f4taines conserv\u00e9es \u00e0 moins 20 degr\u00e9s au si\u00e8ge op\u00e9rationnel de La Salle : comment fonctionne la Banque de Germoplasme du Mus\u00e9e Efisio Noussan et pourquoi c&rsquo;est un outil cl\u00e9 pour la biodiversit\u00e9 alpine.<\/em><\/p>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Au si\u00e8ge op\u00e9rationnel du Mus\u00e9e r\u00e9gional de Sciences naturelles Efisio Noussan de La Salle, des cong\u00e9lateurs r\u00e9gl\u00e9s \u00e0 moins 20 degr\u00e9s abritent des graines et des spores de plus de 80 esp\u00e8ces v\u00e9g\u00e9tales diff\u00e9rentes, appartenant \u00e0 25 familles botaniques, toutes pr\u00e9sentes sur le territoire vald\u00f4tain. Certaines esp\u00e8ces sont rares. D&rsquo;autres sont menac\u00e9es par le changement climatique ou la perte d&rsquo;habitat. Certaines, sans cette banque d&rsquo;archives, pourraient dispara\u00eetre de la Vall\u00e9e d&rsquo;Aoste sans laisser de trace.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><br>Il s&rsquo;agit de la Banque de Germoplasme v\u00e9g\u00e9tal de la Vall\u00e9e d&rsquo;Aoste, l&rsquo;un des outils scientifiques les plus concrets que le Mus\u00e9e met au service de la conservation de la biodiversit\u00e9 alpine r\u00e9gionale.<\/p>\n\n\n\n<div style=\"height:61px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading has-dark-1-color has-text-color has-link-color wp-elements-1\" style=\"font-size:30px\"><strong>Qu&rsquo;est-ce que le germoplasme et pourquoi le conserver ?<\/strong><\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Le terme <em>germoplasme<\/em> d\u00e9signe le mat\u00e9riel g\u00e9n\u00e9tique h\u00e9r\u00e9ditaire d&rsquo;un organisme vivant : les graines, les spores, le pollen et les tissus m\u00e9rist\u00e9matiques contiennent toute l&rsquo;information g\u00e9n\u00e9tique n\u00e9cessaire pour donner vie \u00e0 une nouvelle plante. Conserver le germoplasme signifie, en pratique, pr\u00e9server le potentiel de r\u00e9g\u00e9n\u00e9ration d&rsquo;une esp\u00e8ce m\u00eame lorsque celle-ci a disparu ou s&rsquo;est r\u00e9duite \u00e0 quelques populations dans son habitat naturel. <\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">La conservation du germoplasme hors de son habitat naturel est appel\u00e9e conservation <em>ex situ<\/em> et compl\u00e8te, sans la remplacer, la conservation <em>in situ<\/em> des esp\u00e8ces dans leurs milieux d&rsquo;origine. Les deux strat\u00e9gies sont compl\u00e9mentaires : la conservation <em>in situ<\/em> prot\u00e8ge les populations existantes sur le territoire, tandis que la conservation <em>ex situ<\/em> garantit une r\u00e9serve g\u00e9n\u00e9tique dans laquelle puiser en cas de besoin.<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-dark-1-color has-text-color has-link-color wp-elements-2\" style=\"font-size:30px\"><strong>Comment fonctionne la Banque : de la r\u00e9colte au cong\u00e9lateur<\/strong><\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Le processus de conservation du germoplasme se divise en plusieurs \u00e9tapes distinctes, chacune r\u00e9gie par des protocoles pr\u00e9cis qui d\u00e9terminent la qualit\u00e9 et la long\u00e9vit\u00e9 du mat\u00e9riel conserv\u00e9.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">La premi\u00e8re \u00e9tape est la r\u00e9colte dans la nature : les graines sont r\u00e9colt\u00e9es sur le territoire vald\u00f4tain au moment o\u00f9 elles atteignent leur maturit\u00e9 optimale, en respectant des crit\u00e8res qui garantissent la repr\u00e9sentativit\u00e9 g\u00e9n\u00e9tique de la population d&rsquo;origine. On ne pr\u00e9pare pas un nombre excessif de graines \u00e0 partir d&rsquo;une seule plante ; les \u00e9chantillons sont au contraire r\u00e9partis sur plusieurs individus et plusieurs populations d&rsquo;une m\u00eame esp\u00e8ce afin de capturer la variabilit\u00e9 g\u00e9n\u00e9tique pr\u00e9sente sur le territoire.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Apr\u00e8s la r\u00e9colte, les graines sont nettoy\u00e9es de leurs impuret\u00e9s, compt\u00e9es et soumises \u00e0 une d\u00e9shydratation contr\u00f4l\u00e9e : la r\u00e9duction de la teneur en eau est essentielle pour garantir la long\u00e9vit\u00e9 du mat\u00e9riel pendant son stockage. Les graines trop humides se d\u00e9t\u00e9riorent rapidement, m\u00eame \u00e0 basse temp\u00e9rature.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Les graines d\u00e9shydrat\u00e9es sont ensuite conserv\u00e9es dans de doubles r\u00e9cipients en verre \u00e0 fermeture herm\u00e9tique, \u00e0 l&rsquo;int\u00e9rieur de cong\u00e9lateurs \u00e0 moins 20 degr\u00e9s. \u00c0 cette temp\u00e9rature, les processus m\u00e9taboliques s&rsquo;arr\u00eatent et le mat\u00e9riel g\u00e9n\u00e9tique peut rester viable pendant des d\u00e9cennies, voire des si\u00e8cles dans certains cas, sans perdre sa capacit\u00e9 de germination.<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-dark-1-color has-text-color has-link-color wp-elements-3\" style=\"font-size:30px\"><strong>Les tests de germination et la r\u00e9introduction dans la nature<\/strong><\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">La conservation du germoplasme n&rsquo;est pas un d\u00e9p\u00f4t statique. P\u00e9riodiquement, le personnel du laboratoire effectue des tests de germination sur des \u00e9chantillons du mat\u00e9riel conserv\u00e9 pour v\u00e9rifier que les graines ont maintenu leur viabilit\u00e9 au fil du temps. Si les tests sont positifs, les graines restent aptes \u00e0 la conservation. Si la viabilit\u00e9 tombe en dessous du seuil de s\u00e9curit\u00e9, il est n\u00e9cessaire de proc\u00e9der \u00e0 de nouvelles r\u00e9coltes ou \u00e0 la r\u00e9g\u00e9n\u00e9ration du mat\u00e9riel. <\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">La r\u00e9g\u00e9n\u00e9ration consiste \u00e0 faire germer les graines et \u00e0 cultiver les plantules jusqu&rsquo;\u00e0 ce qu&rsquo;elles produisent de nouvelles graines, qui sont \u00e0 nouveau conserv\u00e9es. Ce processus permet de maintenir le germoplasme vivant sur le long terme. <\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Les plantules produites lors des op\u00e9rations de r\u00e9g\u00e9n\u00e9ration ne sont pas jet\u00e9es : elles sont destin\u00e9es aux Jardins Botaniques Alpins. \u00c0 ce jour, la Banque de Germoplasme vald\u00f4taine a produit environ 150 plantules de 8 esp\u00e8ces diff\u00e9rentes, parmi lesquelles <em>Artemisia campestris<\/em>, <em>Carex limosa<\/em>, <em>Cladium mariscus<\/em> et <em>Hypericum tetrapterum<\/em>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-black-color has-text-color has-link-color wp-elements-4\" style=\"font-size:30px\"><strong>Le r\u00e9seau RIBES et la collaboration nationale<\/strong><\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Depuis 2017, la Banque de Germoplasme de la Vall\u00e9e d&rsquo;Aoste fait partie de RIBES, le R\u00e9seau Italien des Banques de Germoplasme pour la conservation <em>ex situ<\/em> de la flore sauvage italienne. Ce r\u00e9seau coordonne les activit\u00e9s de conservation \u00e0 l&rsquo;\u00e9chelle nationale, favorise l&rsquo;\u00e9change de mat\u00e9riel g\u00e9n\u00e9tique entre les institutions adh\u00e9rentes et garantit la duplication du germoplasme dans diff\u00e9rents sites, r\u00e9duisant ainsi le risque de perte accidentelle des collections. <\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">La participation \u00e0 RIBES int\u00e8gre la Banque de Germoplasme vald\u00f4taine dans un r\u00e9seau de relations scientifiques qui d\u00e9passe largement les fronti\u00e8res r\u00e9gionales, la reliant aux universit\u00e9s, mus\u00e9es, parcs nationaux et r\u00e9gionaux de toute l&rsquo;Italie partageant les m\u00eames objectifs de conservation de la biodiversit\u00e9 v\u00e9g\u00e9tale sauvage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-black-color has-text-color has-link-color wp-elements-5\" style=\"font-size:30px\"><strong>Le lien avec le laboratoire de biotechnologies<\/strong><\/h3>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Les activit\u00e9s de la Banque de Germoplasme s&rsquo;int\u00e8grent \u00e9troitement \u00e0 celles du laboratoire de biotechnologies du Mus\u00e9e. La caract\u00e9risation g\u00e9n\u00e9tique des esp\u00e8ces conserv\u00e9es, r\u00e9alis\u00e9e par des techniques de <em>DNA barcoding<\/em> et de <em>DNA genotyping<\/em>, permet d&rsquo;\u00e9valuer la variabilit\u00e9 g\u00e9n\u00e9tique des populations \u00e9chantillonn\u00e9es et d&rsquo;optimiser les strat\u00e9gies de r\u00e9colte. Savoir combien de populations diff\u00e9rentes d&rsquo;une esp\u00e8ce existent sur le territoire et \u00e0 quel point elles diff\u00e8rent g\u00e9n\u00e9tiquement les unes des autres est essentiel pour d\u00e9cider o\u00f9 et en quelle quantit\u00e9 r\u00e9colter les graines. <\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Cette int\u00e9gration entre la conservation du germoplasme et l&rsquo;analyse g\u00e9n\u00e9tique est l&rsquo;un des \u00e9l\u00e9ments qui distingue la Banque de Germoplasme vald\u00f4taine d&rsquo;un simple d\u00e9p\u00f4t de graines : c&rsquo;est un syst\u00e8me scientifique dans lequel la r\u00e9colte, la conservation et la caract\u00e9risation du mat\u00e9riel s&rsquo;alimentent mutuellement, produisant des connaissances qui am\u00e9liorent l&rsquo;efficacit\u00e9 de chacune de ces trois activit\u00e9s.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des graines et des spores de plus de 80 esp\u00e8ces v\u00e9g\u00e9tales vald\u00f4taines conserv\u00e9es \u00e0 moins 20 degr\u00e9s au si\u00e8ge op\u00e9rationnel de La Salle : comment fonctionne la Banque de Germoplasme du Mus\u00e9e Efisio Noussan et pourquoi c&rsquo;est un outil cl\u00e9 pour la biodiversit\u00e9 alpine. Au si\u00e8ge op\u00e9rationnel du Mus\u00e9e r\u00e9gional de Sciences naturelles Efisio Noussan &hellip; <a href=\"https:\/\/museoscienze.vda.it\/fr\/la-banque-de-germoplasme-vegetal-de-la-vallee-daoste\/\">Leggi di pi\u00f9<\/a><\/p>\n","protected":false},"author":11,"featured_media":85517,"comment_status":"closed","ping_status":"closed","sticky":true,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[52,53],"tags":[18078,18061,18057,17819,17537,17849,17853],"news_category":[17514],"news_expert":[],"news_type":[17520],"class_list":["post-85513","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-homepage-fr","category-news-fr","tag-banque-de-germoplasme","tag-la-salle","tag-laboratoire","tag-musee","tag-museo","tag-valle-daosta","tag-vallee-daoste","news_category-recherche","news_type-approfondissement"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La Banque de Germoplasme v\u00e9g\u00e9tal de la Vall\u00e9e d&#039;Aoste - Museo Regionale di Scienze Naturali Efisio Noussan<\/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:\/\/museoscienze.vda.it\/fr\/la-banque-de-germoplasme-vegetal-de-la-vallee-daoste\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La Banque de Germoplasme v\u00e9g\u00e9tal de la Vall\u00e9e d&#039;Aoste - Museo Regionale di Scienze Naturali Efisio Noussan\" \/>\n<meta property=\"og:description\" content=\"Des graines et des spores de plus de 80 esp\u00e8ces v\u00e9g\u00e9tales vald\u00f4taines conserv\u00e9es \u00e0 moins 20 degr\u00e9s au si\u00e8ge op\u00e9rationnel de La Salle : comment fonctionne la Banque de Germoplasme du Mus\u00e9e Efisio Noussan et pourquoi c&rsquo;est un outil cl\u00e9 pour la biodiversit\u00e9 alpine. Au si\u00e8ge op\u00e9rationnel du Mus\u00e9e r\u00e9gional de Sciences naturelles Efisio Noussan &hellip; Leggi di pi\u00f9\" \/>\n<meta property=\"og:url\" content=\"https:\/\/museoscienze.vda.it\/fr\/la-banque-de-germoplasme-vegetal-de-la-vallee-daoste\/\" \/>\n<meta property=\"og:site_name\" content=\"Museo Regionale di Scienze Naturali Efisio Noussan\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-19T13:30:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-20T07:52:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/museoscienze.vda.it\/wp-content\/uploads\/2026\/10\/IMG_4250-3000x2000.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"3000\" \/>\n\t<meta property=\"og:image:height\" content=\"2000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Valery Lombard\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Valery Lombard\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/museoscienze.vda.it\\\/fr\\\/la-banque-de-germoplasme-vegetal-de-la-vallee-daoste\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/museoscienze.vda.it\\\/fr\\\/la-banque-de-germoplasme-vegetal-de-la-vallee-daoste\\\/\"},\"author\":{\"name\":\"Valery Lombard\",\"@id\":\"https:\\\/\\\/museoscienze.vda.it\\\/#\\\/schema\\\/person\\\/911dc81afb8c931559d10d6d21f01a30\"},\"headline\":\"La Banque de Germoplasme v\u00e9g\u00e9tal de la Vall\u00e9e d&rsquo;Aoste\",\"datePublished\":\"2026-10-19T13:30:00+00:00\",\"dateModified\":\"2026-10-20T07:52:55+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/museoscienze.vda.it\\\/fr\\\/la-banque-de-germoplasme-vegetal-de-la-vallee-daoste\\\/\"},\"wordCount\":1141,\"publisher\":{\"@id\":\"https:\\\/\\\/museoscienze.vda.it\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/museoscienze.vda.it\\\/fr\\\/la-banque-de-germoplasme-vegetal-de-la-vallee-daoste\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/museoscienze.vda.it\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/IMG_4250.jpg\",\"keywords\":[\"banque de germoplasme\",\"La Salle\",\"laboratoire\",\"mus\u00e9e\",\"Museo\",\"Valle d'Aosta\",\"Vall\u00e9e d'Aoste\"],\"articleSection\":[\"homepage\",\"news\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/museoscienze.vda.it\\\/fr\\\/la-banque-de-germoplasme-vegetal-de-la-vallee-daoste\\\/\",\"url\":\"https:\\\/\\\/museoscienze.vda.it\\\/fr\\\/la-banque-de-germoplasme-vegetal-de-la-vallee-daoste\\\/\",\"name\":\"La Banque de Germoplasme v\u00e9g\u00e9tal de la Vall\u00e9e d'Aoste - 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