{"id":4626,"date":"2024-10-04T08:19:23","date_gmt":"2024-10-04T06:19:23","guid":{"rendered":"https:\/\/mucbo.org\/pinus-halepensis\/"},"modified":"2024-10-04T08:19:23","modified_gmt":"2024-10-04T06:19:23","slug":"pinus-halepensis","status":"publish","type":"post","link":"https:\/\/mucbo.org\/es\/pinus-halepensis\/","title":{"rendered":"Pinus halepensis"},"content":{"rendered":"<p>PLANTA DE L&#8217;OCTUBRE 2024:\u00a0<em>Pinus halepensis<\/em><\/p><p>El pi blanc (<em>Pinus halepensis<\/em>), de fulla perenne i copa irregular, produeix pinyes o estr\u00f2bils que poden romandre a l\u2019arbre un parell d\u2019anys o m\u00e9s. Aquest arbre \u00e9s cada cop m\u00e9s present en el nostre paisatge aprofitant incendis i l\u2019abandonament de cultius per expandir-se. Aquest mes d\u2019octubre volem parlar de dos morfotips d\u2019aquest pi que, malgrat no estar bot\u00e0nicament acceptats, es troben ben diferenciats a les nostres col\u00b7leccions. Aquests s\u00f3n el pi &nbsp;\u2018<em>ceciliae<\/em>\u2019 i el pi nan, que cuidam amb especial atenci\u00f3 per la seva raresa i singularitat.<\/p><p>El 1972, els bot\u00e0nics mallorquins Antoni i Lleonard Lloren\u00e7 van descriure la varietat \u2018<em>ceciliae<\/em>\u2019. Aquest pi destaca per una copa m\u00e9s estirada recordant un xiprer, amb branques m\u00e9s dretes i aplicades al tronc. Les seves pinyes (estr\u00f2bils femenins) presenten escudets m\u00e9s prominents disposats en un sol extrem de les branques. Aquesta varietat, considerada una esp\u00e8cie end\u00e8mica, es conserva al Jard\u00ed Bot\u00e0nic amb tres exemplars vius procedents de Mallorca, Menorca i Eivissa. A m\u00e9s al banc de germoplasma tamb\u00e9 conservam llavors d\u2019exemplars de les tres Illes.&nbsp;<\/p><p>El pi nan, descrit com a varietat \u2018<em>minor<\/em>\u2019 el 1840, t\u00e9 les pinyes i les fulles molt m\u00e9s petites que un pi normal i el seu creixement \u00e9s significativament m\u00e9s lent. Els tres exemplars que mantenim a la col\u00b7lecci\u00f3 provenen de Mallorca, igual que les llavors emmagatzemades al banc de germoplasma. El nanisme en pins i altres esp\u00e8cies \u00e9s un fenomen ben documentat. Un exemple \u00e9s l\u2019empelt de bruixa, una mutaci\u00f3 que provoca el creixement apinyat i nan d\u2019una branca. Aquest nanisme \u00e9s causat per la infecci\u00f3 del fitoplasma o plasmidi \u201c<em>Phytoplasma pini<\/em>\u201d, transm\u00e8s per vectors com aus, nematodes, \u00e0cars o insectes. Aquest plasmidi altera el genoma de la planta fent que la branca afectada tengui aquest creixement compacte i dens o apinyat. Podr\u00edem dir que es tracta d\u2019una planta transg\u00e8nica!<\/p><p>Compartim aquesta informaci\u00f3 per destacar la import\u00e0ncia de conservar aquestes rareses bot\u00e0niques i aprofundir en el coneixement de la biodiversitat dels nostres boscos.<\/p><p>Apropa&#8217;t fins al MUCBO &nbsp;| Jard\u00ed Bot\u00e0nic a descobrir de ben aprop aquests arbres tan singulars. Recordau que obrim de dilluns a dissabte, de 10 a 18h, i ara tamb\u00e9 els diumenges, de 10 a 14h!&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>PLANTA DE L&#8217;OCTUBRE 2024:\u00a0Pinus halepensis El pi blanc (Pinus halepensis), de fulla perenne i copa irregular, produeix pinyes o estr\u00f2bils que poden romandre a l\u2019arbre un parell d\u2019anys o m\u00e9s. Aquest arbre \u00e9s cada cop m\u00e9s present en el nostre paisatge aprofitant incendis i l\u2019abandonament de cultius per expandir-se. Aquest mes d\u2019octubre volem parlar de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4082,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[137],"tags":[],"class_list":["post-4626","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-piezas-y-plantas-del-mes"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Pinus halepensis - MUCBO<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mucbo.org\/es\/pinus-halepensis\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pinus halepensis - MUCBO\" \/>\n<meta property=\"og:description\" content=\"PLANTA DE L&#8217;OCTUBRE 2024:\u00a0Pinus halepensis El pi blanc (Pinus halepensis), de fulla perenne i copa irregular, produeix pinyes o estr\u00f2bils que poden romandre a l\u2019arbre un parell d\u2019anys o m\u00e9s. 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