{"id":2880,"date":"2017-09-12T14:51:37","date_gmt":"2017-09-12T12:51:37","guid":{"rendered":"http:\/\/wp.unil.ch\/geoblog\/?p=2880"},"modified":"2022-07-19T12:34:03","modified_gmt":"2022-07-19T10:34:03","slug":"une-avancee-majeure-dans-la-comprehension-des-effets-lies-au-stress-climatique-dans-certains-cepages-suisses","status":"publish","type":"post","link":"https:\/\/wp.unil.ch\/geoblog\/2017\/09\/une-avancee-majeure-dans-la-comprehension-des-effets-lies-au-stress-climatique-dans-certains-cepages-suisses\/","title":{"rendered":"Une avanc\u00e9e majeure dans la compr\u00e9hension des effets li\u00e9s au stress climatique dans certains c\u00e9pages suisses"},"content":{"rendered":"\n<div class=\"wp-block-group has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"background-color:#f2f2f2\">\n<figure class=\"wp-block-image alignleft size-full is-resized is-style-rounded\"><a href=\"https:\/\/wp.unil.ch\/geoblog\/files\/2022\/07\/spangenberg.jpg\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/wp.unil.ch\/geoblog\/files\/2022\/07\/spangenberg.jpg\" alt=\"\" class=\"wp-image-8432\" width=\"200\" height=\"200\" srcset=\"https:\/\/wp.unil.ch\/geoblog\/files\/2022\/07\/spangenberg.jpg 250w, https:\/\/wp.unil.ch\/geoblog\/files\/2022\/07\/spangenberg-150x150.jpg 150w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a><figcaption>Jorge Spangenberg,  Institut des dynamiques de la surface terrestre<\/figcaption><\/figure>\n\n\n\n<p>Une recherche d\u00e9cisive en \u0153nologie men\u00e9e par le <a href=\"https:\/\/www.unil.ch\/unisciences\/jorgespangenberg\">Dr Jorge Spangenberg<\/a>, en collaboration avec le Dr Vivian Zufferey du centre de recherche d&rsquo;Agroscope \u00e0 Pully, a \u00e9tabli par des exp\u00e9riences, que les vignes de Pinot Noir de Leytron (Valais) peuvent s\u2019adapter avec succ\u00e8s \u00e0 des conditions de stress hydriques, d\u2019appauvrissement des sols et d\u2019\u00e9vapotranspiration en lien avec le d\u00e9r\u00e8glement climatique.<\/p>\n\n\n\n<div style=\"height:1px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n\n\n\n<p>Il ressort de l\u2019\u00e9tude experte qu\u2019un appareil de recherche efficient permet d&rsquo;\u00e9tablir pr\u00e9cis\u00e9ment sous quelles conditions climatiques, particuli\u00e8rement la disponibilit\u00e9 de l&rsquo;eau dans le sol, a \u00e9volu\u00e9 le c\u00e9page. La structure mol\u00e9culaire des feuilles de vigne et du vin en p\u00e9riode de photosynth\u00e8se et au repos entre 2009 et 2014 d\u00e9montrent en effet la r\u00e9silience de ce Pinot Noir.<\/p>\n\n\n\n<p>Les plantes stress\u00e9es par le manque d&rsquo;eau assimilent moins d&rsquo;azote et autres nutriments provenant du sol en raison de la faible disponibilit\u00e9 d&rsquo;ions solubles (nitrate, ammonium). Ceci affecte les pr\u00e9curseurs des composants aromatiques des vins.<\/p>\n\n\n\n<p>L&rsquo;\u00e9tude des vignes et des vins par chromatographie et spectrom\u00e9trie de masse pourrait \u00eatre un atout d\u00e9cisif pour l&rsquo;\u0153nologie contemporaine. Cela permettrait de caract\u00e9riser les effets des changements climatiques sur ces c\u00e9pages, en m\u00ealant \u00e0 la tradition ancestrale de la viticulture une approche rationnelle et efficiente pour des terroirs menac\u00e9s. D\u2019autres \u00e9tudes sont \u00e0 para\u00eetre bient\u00f4t sur le Chasselas et la Petite Arvine.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-group has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"background-color:#f2f2f2\">\n<h4 class=\"wp-block-heading\"><strong>R\u00e9f\u00e9rence bibliographique<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li>Jorge E. Spangenberg, Maria Vogiatzaki, Vivian Zufferey, <strong><a rel=\"noreferrer noopener\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0021967317311998\" target=\"_blank\">Gas chromatography and isotope ratio mass spectrometry of Pinot Noir wine volatile compounds (<em>\u03b4<\/em>13C) and solid residues (<em>\u03b4<\/em>13C, <em>\u03b4<\/em>15N) for the reassessment of vineyard water-status<\/a><\/strong>, <em>Journal of Chromatography A<\/em>, Volume 1517, 29 September 2017, pp. 142-155.<\/li><\/ul>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<p>Auteur : CellComDec \/ Nicolas Bourquin<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Une recherche d\u00e9cisive en \u0153nologie men\u00e9e par le Dr Jorge Spangenberg, en collaboration avec le Dr Vivian Zufferey du centre de recherche d&rsquo;Agroscope \u00e0 Pully, a \u00e9tabli par des exp\u00e9riences, que les vignes de Pinot Noir de Leytron (Valais) peuvent s\u2019adapter avec succ\u00e8s \u00e0 des conditions de stress hydriques, d\u2019appauvrissement des sols et d\u2019\u00e9vapotranspiration en [&hellip;]<\/p>\n","protected":false},"author":47,"featured_media":2881,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[66905],"tags":[66941],"class_list":{"0":"post-2880","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-recherche-en-action","8":"tag-jorge-e-spangenberg"},"_links":{"self":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/posts\/2880","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/users\/47"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/comments?post=2880"}],"version-history":[{"count":0,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/posts\/2880\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/media\/2881"}],"wp:attachment":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/media?parent=2880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/categories?post=2880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/tags?post=2880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}