{"id":37412,"date":"2024-02-22T19:15:48","date_gmt":"2024-02-22T18:15:48","guid":{"rendered":"https:\/\/www.newsendip.com\/?p=37412"},"modified":"2024-03-14T10:11:31","modified_gmt":"2024-03-14T09:11:31","slug":"baisse-diversite-genetique-penicillium-camemberti-menace-avenir-camembert-et-roquefort","status":"publish","type":"post","link":"https:\/\/www.newsendip.com\/fr\/baisse-diversite-genetique-penicillium-camemberti-menace-avenir-camembert-et-roquefort\/","title":{"rendered":"La baisse de diversit\u00e9 g\u00e9n\u00e9tique menace-t-elle l\u2019avenir du Camembert et du Roquefort\u202f?"},"content":{"rendered":"<p><strong>Deux fromages fran\u00e7ais traditionnels sont menac\u00e9s par un manque de diversit\u00e9 g\u00e9n\u00e9tique d\u00fb \u00e0 des ann\u00e9es de reproduction asexu\u00e9e. Les consommateurs devront s\u2019habituer \u00e0 des variations de texture, de go\u00fbt et de couleur pour que ces fromages puissent survivre.<\/strong><\/p>\n<figure id=\"attachment_37407\" aria-describedby=\"caption-attachment-37407\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" class=\"size-large wp-image-37407\" src=\"https:\/\/www.newsendip.com\/wp-content\/uploads\/2024\/02\/Camembert_de_Normandie_AOP_11-1024x576.webp\" alt=\"Camembert de Normandie.\" width=\"1024\" height=\"576\" srcset=\"https:\/\/www.newsendip.com\/wp-content\/uploads\/2024\/02\/Camembert_de_Normandie_AOP_11-1024x576.webp 1024w, https:\/\/www.newsendip.com\/wp-content\/uploads\/2024\/02\/Camembert_de_Normandie_AOP_11-60x34.webp 60w, https:\/\/www.newsendip.com\/wp-content\/uploads\/2024\/02\/Camembert_de_Normandie_AOP_11-300x169.webp 300w, https:\/\/www.newsendip.com\/wp-content\/uploads\/2024\/02\/Camembert_de_Normandie_AOP_11-768x432.webp 768w, https:\/\/www.newsendip.com\/wp-content\/uploads\/2024\/02\/Camembert_de_Normandie_AOP_11-1536x864.webp 1536w, https:\/\/www.newsendip.com\/wp-content\/uploads\/2024\/02\/Camembert_de_Normandie_AOP_11.webp 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption id=\"caption-attachment-37407\" class=\"wp-caption-text\">Camembert de Normandie (AOP) | \u00a9&nbsp;Coyau<\/figcaption><\/figure>\n<p>Les chercheurs du <em><a href=\"https:\/\/lejournal.cnrs.fr\/articles\/le-roquefort-et-le-camembert-en-voie-dextinction\">CRNS<\/a><\/em>, la plus grande agence de science fondamentale d\u2019Europe, ont d\u00e9couvert un d\u00e9fi important pour la production de fromage de Camembert et de Roquefort.<\/p>\n<p>Dans le but de cr\u00e9er des fromages visuellement et gastronomiquement agr\u00e9ables, exempts de mycotoxines, la s\u00e9lection par les fabricants des champignons essentiels \u00e0 ces fromages a entra\u00een\u00e9 une r\u00e9duction consid\u00e9rable du mat\u00e9riel g\u00e9n\u00e9tique des micro-organismes.<\/p>\n<p>La pratique courante de la reproduction asexu\u00e9e des micro-organismes, favoris\u00e9e par les industriels, a d\u00e9montr\u00e9 sa non-viabilit\u00e9 \u00e0 long terme. Ce processus fait que les micro-organismes manquent de nouveau mat\u00e9riel g\u00e9n\u00e9tique et accumulent par cons\u00e9quent de nombreuses mutations. Ils sont donc incapables de produire des spores asexu\u00e9es, les cellules des champignons utilis\u00e9es \u00e0 la fois pour la production asexu\u00e9e et la production sexu\u00e9e.<\/p>\n<p>Depuis 1902, la production de la cro\u00fbte du camembert repose sur la reproduction asexu\u00e9e d\u2019une seule souche, le <em>penicillium camemberti<\/em>. Cette souche albinos mutante est \u00e0 l\u2019origine de la couleur blanche et de la texture particuli\u00e8re du camembert.<\/p>\n<h2>Les cons\u00e9quences de la standardisation de la production<\/h2>\n<p>Cependant, les cons\u00e9quences de la standardisation de l\u2019esp\u00e8ce vont au-del\u00e0 de l\u2019esth\u00e9tique, entra\u00eenant une d\u00e9g\u00e9n\u00e9rescence de la souche qui conduit \u00e0 l\u2019infertilit\u00e9 et \u00e0 son extinction potentielle. La reproduction sexu\u00e9e est le seul moyen de compenser les g\u00e8nes mut\u00e9s, car elle permet l\u2019introduction de nouveau mat\u00e9riel g\u00e9n\u00e9tique.<\/p>\n<p>La possibilit\u00e9 d\u2019extinction du <em>P. camemberti<\/em> a suscit\u00e9 l\u2019inqui\u00e9tude de certains industriels. Dans une interview accord\u00e9e \u00e0 <em><a href=\"https:\/\/france3-regions.francetvinfo.fr\/normandie\/fromages-en-danger-pourquoi-le-camembert-est-menace-d-extinction-2928042.html\">France Info<\/a><\/em>, Charles Br\u00e9and, producteur \u00e0 Bermonville (Seine-Maritime) de la soci\u00e9t\u00e9 5 Fr\u00e8res, a d\u00e9clar\u00e9&nbsp;: \u00ab\u202fSi je n\u2019ai plus \u00e7a, je ne fais plus de camembert !\u2026 C\u2019est un compos\u00e9 qui ne repr\u00e9sente que 2 ou 3% du fromage, mais qui est indispensable\u202f\u00bb.<\/p>\n<p>De m\u00eame, la formation de moisissures sur les bleus comme le roquefort est due \u00e0 une souche sp\u00e9cifique de champignon, le <em>penicillium roqueforti<\/em>, qui est surproduite de mani\u00e8re asexu\u00e9e par des g\u00e9n\u00e9rations de clones.<\/p>\n<p>Bien que la population de la souche utilis\u00e9e par l\u2019appellation d\u2019origine prot\u00e9g\u00e9e (AOP) du Roquefort conserve une diversit\u00e9 g\u00e9n\u00e9tique suffisante pour survivre, les fabricants de tous les autres fromages bleus exercent une telle pression sur leur souche de <em>P. roqueforti<\/em> qu\u2019elle est \u00ab\u202fappauvrie au point d\u2019\u00eatre devenue quasi infertile.\u202f\u00bb<\/p>\n<p>Cependant, malgr\u00e9 le ton alarmiste du rapport, la chercheuse Tatiana Giraud, qui a dirig\u00e9 l\u2019\u00e9tude, a assur\u00e9 au <em><a href=\"https:\/\/www.leparisien.fr\/sciences\/le-camembert-et-le-brie-menaces-de-disparition-18-02-2024-DN2MB4WT6NGXZKOIKBXEONAKJQ.php\">Parisien<\/a><\/em> que la situation est plus un probl\u00e8me \u00e0 long terme qu\u2019un danger imm\u00e9diat, affirmant que l\u2019industrie du camembert ne sera pas menac\u00e9e dans les cinq \u00e0 dix prochaines ann\u00e9es.<\/p>\n<p>Selon le magazine du CRNS, le Termignon Bleu, un fromage relativement peu connu originaire de Savoie pourrait potentiellement sauver les fromages bleus de l\u2019extinction. Ce fromage produit naturellement sa propre souche de <em>P. roqueforti<\/em> et pourrait donc offrir la diversit\u00e9 g\u00e9n\u00e9tique dont les fabricants ont d\u00e9sesp\u00e9r\u00e9ment besoin, m\u00eame s\u2019ils doivent s\u2019attendre \u00e0 de l\u00e9g\u00e8res variations dans le produit final d\u00fb \u00e0 l\u2019utilisation de la reproduction sexu\u00e9e.<\/p>\n<p>L\u2019avenir du camembert est en revanche plus incertain. L\u2019AOP Camembert, apr\u00e8s avoir impos\u00e9 la souche albinos de <em>P. camemberti<\/em>, a de plus en plus de mal \u00e0 se procurer de grandes quantit\u00e9s de cette souche qui perd sa capacit\u00e9 \u00e0 se reproduire.<\/p>\n<p>La solution r\u00e9siderait dans l\u2019introduction du <em>Penicillium biforme<\/em>, une esp\u00e8ce g\u00e9n\u00e9tiquement similaire \u00e0 <em>P. camemberti<\/em>, mais dont la couleur est gris-vert et non d\u2019un blanc pur. Si l\u2019inoculation de ces deux esp\u00e8ces permet de sauver l\u2019avenir du camembert, les consommateurs devront s\u2019adapter \u00e0 d\u2019\u00e9ventuels changements de couleur et de texture du fromage, ce que les fabricants tentent d\u2019\u00e9viter depuis 1902.<\/p>\n<h2>Autres obstacles&nbsp;: la r\u00e9glementation et les risques de contamination<\/h2>\n<p>Cette menace g\u00e9n\u00e9tique n\u2019est pas le seul obstacle \u00e0 la production de camembert en <a href=\"https:\/\/www.newsendip.com\/fr\/etiquette\/france-fr\/\">France<\/a>.<\/p>\n<p>Un rapport du <em><a href=\"https:\/\/pdf.sciencedirectassets.com\/279785\/1-s2.0-S0022030219X00107\/1-s2.0-S0022030219306770\/main.pdf?X-Amz-Security-Token=IQoJb3JpZ2luX2VjEHcaCXVzLWVhc3QtMSJHMEUCIC8UVeP3lMVJ%2FuEympMo2Mn%2F1nMZ7cA32SmXts9KjtRKAiEA2GrN7bHO9V91CSgHjen%2BPwxjQCyVO5mVFV2IzKIqVY8qsgUIYBAFGgwwNTkwMDM1NDY4NjUiDOqT4FQ19Bu417nLPiqPBfFNBVldE8w4A%2BScnPQXOKbCFReQG8XdbByxvP7AcEKA%2Bd5ece8wNobHamnxsGuEZw9F4IxlsjwAXUqC9sUdvQ%2Fzq5Ku8dQBN0g%2FAgtWFPHj7DVk1DJkdvzD%2FwSFYcB32hKKrHhZMII2mPAitLHrf0D46GIG5gYijoF3aNJUrCYh5crsDR2C56Ao7RXDf2CFEOeu3OGunCBQftr5DoW9y%2FR5RRlhtHrrCHFZ8H4F29nwnciUXDV9yhfmJHleXe1XMwzbSLKYohl52%2FG6ewFVZ9T%2F3Tgh0TOzAJ3p2WN%2FI3wPte5riq%2FXdS25YAgwfLH%2BufzDvX29KBmXnYb135RVGJfFol3Bf3A4Y2GgOMIxWFHaXmBkuEVx5c9J63upIJr%2FI0d2DrVzYDpqju%2FRO4AwMiiiE7NGCvs3hjCvU3ZrCCK5hbXtgyx8LSCAscb8m5G8KlapB4tx0msmifJ0NifRadKzVn%2FYwfYst6Yk%2Ba1hOjRI3qzCWA4jWlXoOV8oWDu6J2zLe7dSRxPTgRs%2Beh6KBUbUKQTg6VrbMpbluvMRUxDexu%2FtNUDGjd0v7hYfu5vD0tMFyuRRHKInRkwqLr2QtMVRObfX%2F%2BKVbLd%2BUKIdp3SOjP%2BQRQeJ%2BZuHmXE%2FpIqGjb6J6UkW08uJu2g%2BhinlTZFrv%2B8cnoxs99MN4laj%2B0eh1uWiz6%2BIYIsq3yGBxBQ34oOIMulla8sPZ4h8EavBy96qKtXJdFdu8u7uLY8X5G6LEc1W30wN0v5U%2BsZjUNBk0tohymcQPKkctvI6SGxXhxuB3vc2J7F5fiBz4GzvqFwY17Ga2yb9zLXTAgB7YKFvbCnrGXcowEWZnBhFd1UqMxrQ183V15Mq9hUjyYaCCzcwsLjdrgY6sQEq65BPWUD7lzf2Urvvte5dQ1U8CI5yWq6FUzs8EkyYlFOwmMLn1TMwMpmUn53eUHgPHdD1q8Q0fKsEeYUeNJw0X0BHs6BjZ9gEanR4hp9JFZ%2BMCRRudXMnUkVS4p0qnJ5l5xhwH6%2FQIrZ1ae92FSfcLa5QXJf%2F801p3%2BMqj0o94DREW2nyPM7eTEoZPXRqj0CDrfsh%2Bht4xszIUNsEIsakru4D68JwExoaYX%2BONakvCYw%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Date=20240222T152235Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=300&amp;X-Amz-Credential=ASIAQ3PHCVTYZQ6DIFN5%2F20240222%2Fus-east-1%2Fs3%2Faws4_request&amp;X-Amz-Signature=6b79211b15bdfebbaacb559894d3fdfef2553b6ff849e406a985be64ee48e762&amp;hash=109bece1d71be4768b4f97cf9fa93cd74a2d8b4cd6c90a70dee672a077265840&amp;host=68042c943591013ac2b2430a89b270f6af2c76d8dfd086a07176afe7c76c2c61&amp;pii=S0022030219306770&amp;tid=spdf-263e6b37-51ee-48d3-ba25-1de583b605d4&amp;sid=f8c08eab7dbb1341ef689e3181f85eb2b22dgxrqb&amp;type=client&amp;tsoh=d3d3LnNjaWVuY2VkaXJlY3QuY29t&amp;ua=04115d545f59555702&amp;rr=859839af7d4a2a76&amp;cc=fr\">Journal of Dairy Science<\/a><\/em> a mis en avant le risque de contamination au cours du processus de production du camembert. Le processus d\u2019affinage se d\u00e9roulant \u00e0 l\u2019air libre \u00e0 15 degr\u00e9s Celsius, le fromage est expos\u00e9 \u00e0 un risque accru de contamination par des agents pathog\u00e8nes environnementaux tels que la <em>Lysteria monocytogenes<\/em>.<\/p>\n<p>Depuis 2016, les \u00c9tats-Unis appliquent une <a href=\"https:\/\/ndlegis.gov\/assembly\/67-2021\/testimony\/HAGR-1244-20210129-4201-F-NELSON_MARVIN.pdf\">r\u00e9glementation stricte sur l\u2019importation de produits au lait cru<\/a> tels que le camembert. L\u2019authentique camembert de Normandie est fabriqu\u00e9 avec du lait non pasteuris\u00e9, dont 50\u202f% doit provenir de vaches normandes, et est donc interdit par l\u2019agence am\u00e9ricaine de r\u00e9gulation des aliments (FDA).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Deux fromages fran\u00e7ais traditionnels sont menac\u00e9s par un manque de diversit\u00e9 g\u00e9n\u00e9tique d\u00fb \u00e0 des ann\u00e9es de reproduction asexu\u00e9e. Les consommateurs devront s\u2019habituer \u00e0 des variations de texture, de go\u00fbt et de couleur pour que ces fromages puissent survivre.<\/p>\n","protected":false},"author":260,"featured_media":37407,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"wp_typography_post_enhancements_disabled":false,"footnotes":""},"categories":[412],"tags":[428,1334],"class_list":["post-37412","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sciences-et-sante","tag-france-fr","tag-nouveau"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>La baisse de diversit\u00e9 g\u00e9n\u00e9tique menace-t-elle l\u2019avenir du Camembert et du Roquefort ?<\/title>\n<meta name=\"description\" content=\"Deux fromages fran\u00e7ais traditionnels sont menac\u00e9s par un manque de diversit\u00e9 g\u00e9n\u00e9tique d\u00fb \u00e0 des ann\u00e9es de reproduction asexu\u00e9e. 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