{"id":1925,"date":"2017-09-13T00:00:00","date_gmt":"2017-09-13T00:00:00","guid":{"rendered":"https:\/\/jeanleon.com\/2017\/09\/13\/la-vinya-una-maquina-perfecta\/"},"modified":"2023-09-06T09:11:52","modified_gmt":"2023-09-06T09:11:52","slug":"la-vinya-una-maquina-perfecta","status":"publish","type":"post","link":"https:\/\/jeanleon.com\/ca\/la-vinya-una-maquina-perfecta\/","title":{"rendered":"La vinya: una m\u00e0quina perfecta"},"content":{"rendered":"<p>L&#8217;Univers del vi i la viticultura tanquen en si mateixos una met\u00e0fora gaireb\u00e9 al\u00b7leg\u00f2rica del que representa l&#8217;enormitat de la natura i les seves diferents creacions.<\/p>\n<p>Serveixi el vi com a exemple que, com l&#8217;home, at\u00e9n al mateix concepte de cicle biol\u00f2gic: naixement, plenitud vigorosa, declivi i desaparici\u00f3. Tot en un proc\u00e9s de progressiva oxidaci\u00f3 al que convenim en anomenar mort.<\/p>\n<p>De la mateixa manera, tamb\u00e9 la vinya, com l&#8217;\u00e9sser hum\u00e0, pateix els rigors de l&#8217;estiu, aix\u00ed com el d&#8217;un progressiu augment de les temperatures derivat del canvi clim\u00e0tic que ens amena\u00e7a. I com l&#8217;\u00e9sser hum\u00e0, la vinya s&#8217;adapta al seu medi i als canvis que en ell es produeixen. Fins i tot \u00e9s capa\u00e7 de reinicialitzar el seu metabolisme per sobreviure a la calor i la sequera.<\/p>\n<p>Aix\u00ed, la vinya ha desenvolupat tres mecanismes d&#8217;adaptaci\u00f3 davant l&#8217;estr\u00e8s h\u00eddric i la sequera que tornen a posar de manifest l&#8217;enorme capacitat d&#8217;adaptaci\u00f3 de la planta i al mateix temps, el meravell\u00f3s de la natura, i que passem a resumir a continuaci\u00f3:<\/p>\n<ul>\n<li><strong>Mecanisme d&#8217;escapament:<\/strong> Les mateixes plantes acceleren o retarden el seu cicle fenol\u00f2gic per no resultar afectades durant l&#8217;\u00e8poca de sequera. Un exemple d&#8217;aquest tipus de mecanisme d&#8217;escapament serien les plantes de germinaci\u00f3 r\u00e0pida en zones molt \u00e0rides com el desert.<\/li>\n<\/ul>\n<ul>\n<li><strong>Mecanisme de Toler\u00e0ncia:<\/strong> Es tracta d&#8217;una resposta r\u00e0pida de la planta despr\u00e9s de percebre un estr\u00e8s h\u00eddric imminent i t\u00e9 com a objectiu mantenir l&#8217;home\u00f2stasi cel\u00b7lular, \u00e9s a dir, una const\u00e0ncia en els compostos cel\u00b7lulars. Per a aix\u00f2, la vinya ha de mantenir una pressi\u00f3 hipoatmosf\u00e8rica negativa respecte al terra perqu\u00e8 pugui absorbir aigua de les arrels. Aquesta pressi\u00f3 negativa esdev\u00e9 gr\u00e0cies a la transpiraci\u00f3 de l&#8217;aigua a les fulles. En condicions realment seques, la vinya tanca els estomes (unes obertures microsc\u00f2piques a l&#8217;epidermis de les fulles) de manera que augmenta la pressi\u00f3 negativa entre les mateixes fulles i el terra, el que a la vegada, tamb\u00e9 afecta la producci\u00f3 de sucre i energia de la planta.<\/li>\n<\/ul>\n<ul>\n<li><strong>Mecanisme d&#8217;Atenuaci\u00f3:<\/strong> o de com optimitzar recursos amb el m\u00ednim desgast. En aquest cas la planta utilitza diferents mecanismes per regular la gesti\u00f3 del seu estatus h\u00eddric durant l&#8217;\u00e8poca de sequera. I ho fa restringint severament la p\u00e8rdua d&#8217;aigua per transpiraci\u00f3. En altres paraules, controlant la seva pr\u00f2pia suor.<\/li>\n<\/ul>\n<p>Com? Minorant el ritme de la seva activitat, disminuint la producci\u00f3 de fulles o corbant-les; augmentant la seva verticalitat; minorant el ritme del seu creixement o fins i tot provocant un envelliment accelerat i prematur de les mateixes fulles o fins i tot dels ra\u00efms en situacions excepcionals de severitat clim\u00e0tica.<\/p>\n<p>Com veiem, la naturalesa no deixa de sorprendre&#8217;ns i s&#8217;obstina a establir analogies que ens demostren el seu potencial creador (i transformador) de vida, mitjan\u00e7ant una perfecta planificaci\u00f3 \u00abgen\u00e8tica\u00bb que iguala a tots els \u00e9ssers vius davant la pr\u00f2pia exist\u00e8ncia, i de manera irremissible, tamb\u00e9 davant la nostra mort.<\/p>\n<p>Una mena de pla mestre dut a terme per m\u00e0quines perfectes, artesania d&#8217;una enginyeria del que \u00e9s natural que supera amb escreix a qualsevol concepte o idea que l&#8217;\u00e9sser hum\u00e0 sigui capa\u00e7 de concebre.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&#8217;Univers del vi i la viticultura tanquen en si mateixos una met\u00e0fora gaireb\u00e9 al\u00b7leg\u00f2rica del que representa l&#8217;enormitat de la natura i les seves diferents creacions. Serveixi el vi com a exemple que, com l&#8217;home, at\u00e9n al mateix concepte de cicle biol\u00f2gic: naixement, plenitud vigorosa, declivi i desaparici\u00f3. Tot en un proc\u00e9s de progressiva oxidaci\u00f3 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":701,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[],"class_list":["post-1925","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La vinya: una m\u00e0quina perfecta - Jean Leon<\/title>\n<meta name=\"description\" content=\"De la mateixa manera, tamb\u00e9 la vinya, com l&#039;\u00e9sser hum\u00e0, sofreix els rigors de l&#039;estiu, aix\u00ed com el d&#039;un progressiu augment de...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jeanleon.com\/ca\/la-vinya-una-maquina-perfecta\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La vinya: una m\u00e0quina perfecta - 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