{"id":21041541,"date":"2019-11-20T22:01:00","date_gmt":"2019-11-20T21:01:00","guid":{"rendered":"https:\/\/geek.hr\/znanost\/?p=21041541"},"modified":"2023-06-07T13:15:43","modified_gmt":"2023-06-07T11:15:43","slug":"zasto-neke-pcele-postanu-radnice-a-neke-kraljice","status":"publish","type":"post","link":"https:\/\/geek.hr\/znanost\/clanak\/zasto-neke-pcele-postanu-radnice-a-neke-kraljice\/","title":{"rendered":"Za\u0161to neke p\u010dele postanu radnice, a neke &#8211; kraljice?"},"content":{"rendered":"\n<p>Izreka &#8220;ono si \u0161to jede\u0161&#8221; posebno je to\u010dna za \u017eenke medonosnih p\u010dela, koje kad odrastu budu ili male sterilne radnice ili velike plodne kraljice, ovisno o njihovoj prehrani. Brojni znanstvenici dosad su mislili da ne\u0161to u hrani koju dobivaju mlade kraljice &#8211; izlu\u010devina koja se naziva <a href=\"https:\/\/geek.hr\/znanost\/clanak\/maticna-mlijec-odlicno-zacjeljuje-rane-a-sada-znamo-i-zasto\/\" target=\"_blank\" rel=\"noopener\">mati\u010dna mlije\u010d<\/a> &#8211; \u010dini svu razliku. No, jedna studija predla\u017ee da signalne molekule u hrani mladih p\u010dela radnica odr\u017eavaju njihov spolni razvoj. Ta hrana, mje\u0161avina peludi i meda koja se naziva &#8220;p\u010delinjim kruhom&#8221;, sadr\u017ei posebnu vrstu mikroRNK (miRNK), nekodiraju\u0107ih molekula RNK koje poma\u017eu u regulaciji ekspresije gena.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"800\" src=\"https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2022\/09\/pcela-radilica-1200x800.jpg\" alt=\"\" class=\"wp-image-21066207\" srcset=\"https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2022\/09\/pcela-radilica-1200x800.jpg 1200w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2022\/09\/pcela-radilica-300x200.jpg 300w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2022\/09\/pcela-radilica-768x512.jpg 768w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2022\/09\/pcela-radilica-1536x1024.jpg 1536w, https:\/\/geek.hr\/znanost\/wp-content\/uploads\/sites\/14\/2022\/09\/pcela-radilica.jpg 1920w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><figcaption class=\"wp-element-caption\">Foto: Pixabay<\/figcaption><\/figure>\n<\/div>\n\n\n<p>Kako bi otkrili jesu li ove miRNK stvarni krivac, znanstvenici su ih dodali u prehranu li\u010dniki uzgojenih u laboratoriju. Ove li\u010dinke razvijale su se sporije, s manjim tijelima i manjim jajnicima nego li\u010dinke koje su jele hranu bez dodataka, objavljeno je tom prilikom u \u010dasopisu <em>PLOS Genetics<\/em>. Znanstvenici su prona\u0161li i da jedna \u010desta biljna miRNK u p\u010delinjem kruhu isklju\u010duje gen koji poma\u017ee li\u010dinkama da postanu kraljice.<\/p>\n\n\n\n<p>Nakon \u0161to su pojedene s hranom, ove miRNK mogu u\u0107i u crijeva p\u010dele i pro\u0161iriti se ostatkom tijela, gdje poma\u017eu regulirati klju\u010dne gene, ka\u017eu znanstvenici. Iako biljna miRNA sama po sebi nije dovoljna za pretvorbu kraljica u radnice, potencijalne kraljice ne \u017eele jesti kruh obi\u010dnoga puka.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Izreka &#8220;ono si \u0161to jede\u0161&#8221; posebno je to\u010dna za \u017eenke medonosnih p\u010dela, koje kad odrastu budu ili male sterilne radnice ili velike plodne kraljice, ovisno o njihovoj prehrani. Brojni znanstvenici dosad su mislili da ne\u0161to u hrani koju dobivaju mlade kraljice &#8211; izlu\u010devina koja se naziva mati\u010dna mlije\u010d &#8211; \u010dini svu razliku. No, jedna studija [&hellip;]<\/p>\n","protected":false},"author":10022,"featured_media":21066206,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[16346],"tags":[18525,16953,16655],"class_list":["post-21041541","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-biljke-i-zivotinje","tag-genetika","tag-pcela","tag-pcele"],"modified_by":null,"_links":{"self":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts\/21041541","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/users\/10022"}],"replies":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/comments?post=21041541"}],"version-history":[{"count":4,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts\/21041541\/revisions"}],"predecessor-version":[{"id":21067319,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/posts\/21041541\/revisions\/21067319"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/media\/21066206"}],"wp:attachment":[{"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/media?parent=21041541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/categories?post=21041541"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/geek.hr\/znanost\/wp-json\/wp\/v2\/tags?post=21041541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}