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{"id":2257,"date":"2012-02-20T06:55:27","date_gmt":"2012-02-20T04:55:27","guid":{"rendered":"https:\/\/energethique.be\/?p=2257"},"modified":"2012-02-14T18:59:42","modified_gmt":"2012-02-14T16:59:42","slug":"les-terres-avoisinant-le-site-de-tchernobyl-sont-elles-cultivables","status":"publish","type":"post","link":"https:\/\/energethique.be\/2012\/les-terres-avoisinant-le-site-de-tchernobyl-sont-elles-cultivables\/","title":{"rendered":"Les terres avoisinant le site de Tchernobyl sont-elles cultivables ?"},"content":{"rendered":"

Les terres avoisinant le site de Tchernobyl sont-elles cultivables ? Des chercheurs slovaques et ukrainiens se sont pench\u00e9s sur la question<\/p>\n

http:\/\/www.bulletins-electroniques.com\/actualites\/69105.htm<\/a><\/p>\n

La centrale nucl\u00e9aire de Tchernobyl a explos\u00e9 en avril 1986, laissant s’\u00e9chapper un nuage de particules radioactives et contaminant ainsi l’air et les sols environnants. En d\u00e9pit de cette catastrophe de grande ampleur, des plantes continuent de prosp\u00e9rer sur ce domaine et se sont semble-t-il bien adapt\u00e9es aux nouvelles conditions et aux sols contamin\u00e9s.<\/p>\n

Une \u00e9quipe de chercheurs slovaques et ukrainiens, sous la direction de Martin Hajduch, directeur de l’Institut de g\u00e9n\u00e9tique des plantes et de biotechnologie de l’Acad\u00e9mie slovaque des sciences [1], s’est pench\u00e9e sur cet \u00e9trange ph\u00e9nom\u00e8ne. \u00ab\u00a0Si vous vous rendez dans la r\u00e9gion de Tchernobyl, vous ne pouvez imaginer ce qui s’y est pass\u00e9\u00a0\u00bb explique Martin Hajduch. \u00ab\u00a0Les plantes ont \u00e9t\u00e9 parfaitement capables de s’adapter \u00e0 la radioactivit\u00e9 et nous avons voulu comprendre comment, quel type de changement mol\u00e9culaire avait eu lieu.\u00a0\u00bb<\/p>\n

Les premiers r\u00e9sultats de cette \u00e9tude, qui ont \u00e9t\u00e9 publi\u00e9s dans la revue Environmental Science and Technology [2] et relay\u00e9s par le New York Times, permettent d’\u00e9mettre l’hypoth\u00e8se que c’est le taux de prot\u00e9ine dans les plantes qui a \u00e9t\u00e9 l\u00e9g\u00e8rement ajust\u00e9 et a permis leur adaptabilit\u00e9. En effet, Martin Hajduch et ses coll\u00e8gues ont cultiv\u00e9 des graines de lin dans des sols contamin\u00e9s de la r\u00e9gion de Tchernobyl et les ont compar\u00e9es avec des graines de lin cultiv\u00e9es dans un sol non irradi\u00e9. Ils n’ont trouv\u00e9 que tr\u00e8s peu de disparit\u00e9s entre les plantes, hormis leurs taux de prot\u00e9ines diff\u00e9rents de 5%, et en ont conclu que ces changements dans le taux des prot\u00e9ines pourraient \u00eatre un m\u00e9canisme de d\u00e9fense des plantes contre les radiations.<\/p>\n

\u00ab\u00a0Les plantes qui poussent sur un sol radioactif semblent \u00eatre en bonne sant\u00e9. Je ne dirais pas que tout ce qui pousse sur un sol contamin\u00e9 est comestible mais ce n’est pas d\u00e9ficient pour autant. Nous nous sommes rendu compte que la radioactivit\u00e9 du sol \u00e9tait effectivement enti\u00e8rement absorb\u00e9e par la plante mais qu’elle n’atteignait que tr\u00e8s peu les graines. Ainsi, m\u00eame si la plante est radioactive, ses graines le sont tr\u00e8s peu. Et dans le lin encore moins que dans la soie. Il est, bien s\u00fbr, absurde de cultiver dans de telles zones mais il est important de savoir que c’est \u00e9ventuellement possible de le faire si cela devenait une n\u00e9cessit\u00e9.\u00a0\u00bb<\/p>\n

Les r\u00e9sultats publi\u00e9s \u00e0 ce jour portent sur la comparaison de cultures de premi\u00e8re g\u00e9n\u00e9ration et les chercheurs de l’\u00e9quipe de l’Institut de g\u00e9n\u00e9tique des plantes et de biotechnologie ont \u00e9galement l’intention de publier les r\u00e9sultats de recherche sur les deuxi\u00e8mes et troisi\u00e8mes g\u00e9n\u00e9rations.<\/p>\n

– [1] Site de l’Institut de g\u00e9n\u00e9tique des plantes et de biotechnologie de la SAS (EN) : http:\/\/pribina.savba.sk\/ugbr\/
\n– [2] Site de la Revue Environmental Science and Technology (EN) : http:\/\/pubs.acs.org\/journal\/esthag<\/p>\n

Sources :<\/p>\n

Article de presse g\u00e9n\u00e9raliste – SME (SK) : http:\/\/redirectix.bulletins-electroniques.com\/3LtSk<\/p>\n

R\u00e9dacteurs :<\/p>\n

Chlo\u00e9 Mugler – chloe.mugler@diplomatie.gouv.fr<\/p>\n

Origine :<\/p>\n

BE Slovaquie num\u00e9ro 23 (13\/02\/2012) – Ambassade de France en Slovaquie \/ ADIT – http:\/\/www.bulletins-electroniques.com\/actualites\/69105.ht<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Les terres avoisinant le site de Tchernobyl sont-elles cultivables ? Des chercheurs slovaques et ukrainiens se sont pench\u00e9s sur la question<\/p>\n

http:\/\/www.bulletins-electroniques.com\/actualites\/69105.htm<\/a><\/p>\n

La centrale nucl\u00e9aire de Tchernobyl a explos\u00e9 en avril 1986, laissant s’\u00e9chapper un nuage de particules radioactives et contaminant ainsi l’air et les sols environnants. En d\u00e9pit de cette catastrophe de grande ampleur, des plantes continuent de prosp\u00e9rer sur ce domaine et se sont semble-t-il bien adapt\u00e9es aux nouvelles conditions et aux sols contamin\u00e9s.<\/p>\n

Une \u00e9quipe de chercheurs slovaques […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[1],"tags":[],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/pBGwz-Ap","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts\/2257"}],"collection":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/comments?post=2257"}],"version-history":[{"count":0,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts\/2257\/revisions"}],"wp:attachment":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/media?parent=2257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/categories?post=2257"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/tags?post=2257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}