{"id":25267,"date":"2023-10-09T12:00:52","date_gmt":"2023-10-09T10:00:52","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=25267"},"modified":"2023-10-03T09:06:16","modified_gmt":"2023-10-03T07:06:16","slug":"les-premiers-agrumes-pourraient-provenir-du-sud-de-la-chine","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/les-premiers-agrumes-pourraient-provenir-du-sud-de-la-chine\/","title":{"rendered":"Les premiers agrumes pourraient provenir du sud de la Chine"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>Une analyse g\u00e9n\u00e9tique approfondie des agrumes permet d&rsquo;identifier leur probable origine. Une analyse g\u00e9n\u00e9tique sugg\u00e8re que la ville d&rsquo;origine des agrumes se trouve en Chine.<\/p>\n<p>Un examen approfondi des membres sauvages de l&rsquo;arbre g\u00e9n\u00e9alogique de l&rsquo;orange sugg\u00e8re que la premi\u00e8re esp\u00e8ce du genre Citrus est apparue il y a environ 8 millions d&rsquo;ann\u00e9es dans ce qui est aujourd&rsquo;hui le centre-sud de la Chine, rapportent des chercheurs le 2 octobre dans Nature Genetics. Les anc\u00eatres de la lign\u00e9e Citrus sont peut-\u00eatre arriv\u00e9s en Asie sur la plaque tectonique indienne il y a environ 25 millions d&rsquo;ann\u00e9es, lorsqu&rsquo;elle est entr\u00e9e en collision avec la plaque asiatique.<\/p>\n<p>Aujourd&rsquo;hui, une multitude de fruits acidul\u00e9s &#8211; y compris des oranges, des citrons et des limes cr\u00e9\u00e9s par l&rsquo;homme &#8211; garnissent les rayons des \u00e9piceries. Mais on ne conna\u00eet pas exactement le lieu d&rsquo;\u00e9volution de leurs plus anciens anc\u00eatres. Des \u00e9tudes ant\u00e9rieures ont point\u00e9 du doigt des endroits comme le nord-est de l&rsquo;Australie, le sud de la Chine ou les contreforts sud-est de l&rsquo;Himalaya. Selon l&rsquo;horticulteur Qiang Xu, reconstituer l&rsquo;\u00e9volution des agrumes pourrait aider les chercheurs \u00e0 cr\u00e9er des vari\u00e9t\u00e9s de plantes r\u00e9sistantes \u00e0 la s\u00e9cheresse ou aux maladies, tout en produisant des fruits de qualit\u00e9. (SN : 4\/14\/15).<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p>Pour d\u00e9terminer les origines des agrumes, Xu, de l&rsquo;universit\u00e9 agricole Huazhong de Wuhan, en Chine, et ses coll\u00e8gues ont construit un arbre g\u00e9n\u00e9alogique \u00e0 partir des plans g\u00e9n\u00e9tiques de 314 agrumes et plantes apparent\u00e9es, dont 15 esp\u00e8ces d&rsquo;agrumes. Les chercheurs se sont \u00e9galement rendus sur le terrain pour d\u00e9couvrir o\u00f9 les arbres poussent \u00e0 l&rsquo;\u00e9tat sauvage. Les agrumes les plus anciens &#8211; dont C. trifoliata, l&rsquo;orange trifoli\u00e9e &#8211; se trouvent dans le centre-sud de la Chine, ce qui sugg\u00e8re que cette r\u00e9gion est le berceau du genre.<\/p>\n<p>L&rsquo;\u00e9volution des agrumes ne s&rsquo;est pas arr\u00eat\u00e9e l\u00e0. L&rsquo;\u00e9quipe a d\u00e9couvert que certaines esp\u00e8ces ont des racines dans les r\u00e9gions identifi\u00e9es par les \u00e9tudes pr\u00e9c\u00e9dentes. Le pomelo et le c\u00e9drat semblent \u00eatre apparus dans les contreforts de l&rsquo;Himalaya, et certains agrumes sauvages ont \u00e9volu\u00e9 en Australie.<\/p>\n<p>Les chercheurs ont \u00e9galement confirm\u00e9 qu&rsquo;un g\u00e8ne appel\u00e9 PH4 est li\u00e9 \u00e0 la quantit\u00e9 d&rsquo;acide citrique \u00e0 l&rsquo;int\u00e9rieur de chaque fruit. Le g\u00e8ne PH4 active une pompe \u00e0 protons qui permet \u00e0 l&rsquo;acide citrique de s&rsquo;accumuler \u00e0 l&rsquo;int\u00e9rieur des oranges et des fruits similaires. Plus il y a d&rsquo;acide citrique, plus le go\u00fbt est acidul\u00e9.<\/p>\n<p>Adaptation <a href=\"https:\/\/www.laterredufutur.com\/accueil\/\" rel=\"noopener\" target=\"_blank\">Terra Projects<\/a><\/p>\n<p>Source : <a href=\"https:\/\/www.sciencenews.org\/article\/first-citrus-fruits-china-origin\" rel=\"noopener\" target=\"_blank\">https:\/\/www.sciencenews.org\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"25267\">(110)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Une analyse g\u00e9n\u00e9tique approfondie des agrumes permet d&rsquo;identifier leur probable origine. Une analyse g\u00e9n\u00e9tique sugg\u00e8re que la ville d&rsquo;origine des&#8230;<\/p>\n","protected":false},"author":1,"featured_media":25270,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[33],"tags":[8058,537,8057,8056,251],"class_list":["post-25267","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archeologie","tag-agrumes","tag-chine","tag-citron","tag-orange","tag-origine","wpcat-33-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/10\/oranges.jpg?fit=1280%2C850&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-6zx","jetpack-related-posts":[{"id":24643,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-de-ladn-dune-femme-homo-sapiens-dasie-de-lest-qui-la-relie-aux-premiers-amerindiens\/","url_meta":{"origin":25267,"position":0},"title":"D\u00e9couverte de l&rsquo;ADN d&rsquo;une femme Homo sapiens d&rsquo;Asie de l&rsquo;Est qui la relie aux premiers Am\u00e9rindiens","author":"Admin","date":"10 janvier 2023","format":false,"excerpt":"Une population d'Homo sapiens jusqu'alors inconnue habitait ce qui est aujourd'hui le sud-ouest de la Chine il y a environ 14 000 ans et a contribu\u00e9 \u00e0 l'ascendance des anciens Am\u00e9rindiens. L'identit\u00e9 \u00e9volutive de ce groupe asiatique tr\u00e8s diversifi\u00e9 a \u00e9t\u00e9 r\u00e9v\u00e9l\u00e9e gr\u00e2ce \u00e0 l'ADN ancien extrait d'une calotte cr\u00e2nienne\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/amerindienne.jpg?fit=1000%2C1000&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/amerindienne.jpg?fit=1000%2C1000&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/amerindienne.jpg?fit=1000%2C1000&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/amerindienne.jpg?fit=1000%2C1000&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":27167,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-chaine-de-volcans-fossilises-de-640km-de-long-decouverte-sous-la-chine\/","url_meta":{"origin":25267,"position":1},"title":"Une cha\u00eene de volcans fossilis\u00e9s de 640km de long d\u00e9couverte sous la Chine","author":"Admin","date":"18 ao\u00fbt 2025","format":false,"excerpt":"Des chercheurs ont r\u00e9cemment d\u00e9couvert une immense cha\u00eene de volcans \u00e9teints enfouis profond\u00e9ment sous la Chine du Sud, qui s'est form\u00e9e lorsque deux plaques tectoniques sont entr\u00e9es en collision lors de la rupture de Rodinia, il y a environ 800 millions d'ann\u00e9es. Des chercheurs ont d\u00e9couvert une cha\u00eene de volcans\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/08\/supercontinent-Rodinia.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/08\/supercontinent-Rodinia.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/08\/supercontinent-Rodinia.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/08\/supercontinent-Rodinia.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":24220,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-dun-crane-amerindien-en-chine-date-de-14000-ans\/","url_meta":{"origin":25267,"position":2},"title":"D\u00e9couverte d&rsquo;un crane am\u00e9rindien en Chine dat\u00e9 de 14000 ans","author":"Admin","date":"17 juillet 2022","format":false,"excerpt":"Depuis 2008, des fossiles d\u00e9couverts dans la grotte de Maludong (ou grotte du Cerf rouge) situ\u00e9e dans la province de Yunnan, au sud-ouest de la Chine, sont un v\u00e9ritable casse-t\u00eate pour les anthropologues. Malgr\u00e9 plusieurs ann\u00e9es de recherches, les scientifiques ne sont pas parvenus \u00e0 retracer leurs origines exactes. Une\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/07\/crane-amerindien-en-chine.jpg?fit=1024%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/07\/crane-amerindien-en-chine.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/07\/crane-amerindien-en-chine.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/07\/crane-amerindien-en-chine.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":27323,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-dun-crane-qui-font-remonter-lorigine-de-notre-espece-a-1-million-dannees\/","url_meta":{"origin":25267,"position":3},"title":"D\u00e9couverte d&rsquo;un crane qui font remonter l&rsquo;origine de notre esp\u00e8ce \u00e0 1 million d&rsquo;ann\u00e9es ?","author":"Admin","date":"7 octobre 2025","format":false,"excerpt":"En analysant un cr\u00e2ne vieux d\u2019un million d\u2019ann\u00e9es, des pal\u00e9oanthropologues ont d\u00e9couvert que l\u2019esp\u00e8ce humaine pourrait \u00eatre bien plus ancienne qu\u2019on ne le pensait. Jusqu\u2019\u00e0 aujourd\u2019hui, dimanche 5 octobre 2025, le consensus scientifique stipulait qu\u2019Homo sapiens avait diverg\u00e9 de son plus proche anc\u00eatre, Homo erectus, il y a 500 000\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/05\/homo-sapiens-chasseur-cueilleur-1.jpg?fit=1024%2C793&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/05\/homo-sapiens-chasseur-cueilleur-1.jpg?fit=1024%2C793&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/05\/homo-sapiens-chasseur-cueilleur-1.jpg?fit=1024%2C793&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/05\/homo-sapiens-chasseur-cueilleur-1.jpg?fit=1024%2C793&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":4477,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-pollution-a-lorigine-de-10-000-deces-par-an-dans-le-sud-de-la-chine\/","url_meta":{"origin":25267,"position":4},"title":"La pollution \u00e0 l&rsquo;origine de 10.000 d\u00e9c\u00e8s par an dans le sud de la Chine","author":"Admin","date":"27 juin 2008","format":false,"excerpt":"HONG KONG (AFP) \u2014 La pollution de l'air est \u00e0 l'origine d'au moins 10.000 d\u00e9c\u00e8s par an \u00e0 Hong Kong, Macao et dans le sud de la Chine, selon les r\u00e9sultats d'une \u00e9tude publi\u00e9s mercredi 11 juin 2008 \u00e0 Hong Kong. La pollution de l'air est \u00e9galement responsable de 440.000\u2026","rel":"","context":"Dans &quot;Pollution&quot;","block_context":{"text":"Pollution","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/pollution\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/Hong-Kong.jpg?fit=359%2C240&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":10092,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-autre-espece-humaine-a-peut-etre-survecu-a-lage-de-glace\/","url_meta":{"origin":25267,"position":5},"title":"Une autre esp\u00e8ce humaine a peut-\u00eatre surv\u00e9cu \u00e0 l&rsquo;\u00e2ge de glace","author":"Admin","date":"18 d\u00e9cembre 2015","format":false,"excerpt":"L\u2019Homme de Neandertal a peut-\u00eatre eu de la compagnie. Un f\u00e9mur retrouv\u00e9 en 1989 dans une grotte en Chine fait penser aux scientifiques qu\u2019une ancienne esp\u00e8ce d\u2019\u00eatres humains aurait surv\u00e9cu beaucoup plus longtemps qu\u2019on ne le pensait jusqu\u2019alors, selon une \u00e9tude publi\u00e9e jeudi. Cet os vieux de 14.000 ans a\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/12\/homme-vivait-14000-ans-maludong-chine.jpg?fit=648%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/12\/homme-vivait-14000-ans-maludong-chine.jpg?fit=648%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/12\/homme-vivait-14000-ans-maludong-chine.jpg?fit=648%2C415&ssl=1&resize=525%2C300 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/25267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=25267"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/25267\/revisions"}],"predecessor-version":[{"id":25268,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/25267\/revisions\/25268"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/25270"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=25267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=25267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=25267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}