{"id":7302,"date":"2026-01-25T17:41:07","date_gmt":"2026-01-25T15:41:07","guid":{"rendered":"https:\/\/www.schooler.org.ua\/uk-uaprototaksiti-vtrachena-gilka-na-derevi-zhittja-ru-ruprototaxites\/"},"modified":"2026-01-25T17:41:07","modified_gmt":"2026-01-25T15:41:07","slug":"uk-uaprototaksiti-vtrachena-gilka-na-derevi-zhittja-ru-ruprototaxites","status":"publish","type":"post","link":"https:\/\/www.schooler.org.ua\/fr\/uk-uaprototaksiti-vtrachena-gilka-na-derevi-zhittja-ru-ruprototaxites\/","title":{"rendered":"Prototaxites: Ztracen\u00e1 v\u011btev na strom\u011b \u017eivota?"},"content":{"rendered":"<p>V\u00edce ne\u017e 170 let si v\u011bdci l\u00e1mali hlavu nad t\u00edm, co byli <em>Prototaxiti<\/em> \u2013 ob\u0159\u00ed fosilie podobn\u00e9 strom\u016fm, kter\u00e9 p\u0159edch\u00e1zely lesy o miliony let. Tyto struktury, dosahuj\u00edc\u00ed v\u00edce ne\u017e 7,5 metru na v\u00fd\u0161ku, dominovaly krajin\u011b Zem\u011b p\u0159ed v\u00fdvojem modern\u00edch strom\u016f. Navzdory d\u016fkladn\u00e9mu studiu jejich m\u00edsto v d\u011bjin\u00e1ch \u017eivota z\u016fst\u00e1valo z\u00e1hadou \u2013 a\u017e dosud. <\/p>\n<h3>Star\u00e9 tajemstv\u00ed<\/h3>\n<p>Fosilie <em>Prototaxites<\/em>, objeven\u00e9 v roce 1843, se vzp\u00edraly snadn\u00e9 klasifikaci. Po\u010d\u00e1te\u010dn\u00ed teorie nazna\u010dovaly, \u017ee se jednalo o primitivn\u00ed formu stromu, ale brzy se objevily nesrovnalosti. Alternativn\u00ed hypot\u00e9zy navrhovaly ob\u0159\u00ed suchozemsk\u00e9 \u0159asy nebo kolos\u00e1ln\u00ed houbu. Nic v\u0161ak nebylo dokonal\u00e9. Jak poznamen\u00e1v\u00e1 Matthew Nelsen z Natural History Museum, \u201em\u00e1 pocit, \u017ee se to nikam nehod\u00ed\u201c. Hlavn\u00edm probl\u00e9mem bylo, \u017ee <em>Prototaxites<\/em> sd\u00edleli povrchov\u00e9 rysy s houbami, ale postr\u00e1daly kl\u00ed\u010dov\u00e9 vlastnosti, co\u017e znemo\u017e\u0148ovalo klasifikaci. <\/p>\n<h3>Nov\u00e9 d\u016fkazy ukazuj\u00ed na jedine\u010dnou pobo\u010dku<\/h3>\n<p>Nov\u00e1 studie publikovan\u00e1 v <em>Science Advances<\/em> nazna\u010duje, \u017ee <em>Prototaxites<\/em> mohou p\u0159edstavovat d\u0159\u00edve nezn\u00e1m\u00e9 kr\u00e1lovstv\u00ed \u017eivota. V\u011bdci porovnali fosilie <em>Prototaxites<\/em> s dob\u0159e zachovan\u00fdmi zbytky hub ze stejn\u00e9ho geologick\u00e9ho obdob\u00ed. V\u00fdsledky uk\u00e1zaly kritick\u00e9 rozd\u00edly ve vnit\u0159n\u00ed struktu\u0159e: <em>Prototaxites<\/em> vykazovaly chaotick\u00e9 v\u011btven\u00ed, na rozd\u00edl od \u0159\u00e1dn\u00e9ho r\u016fstu houbov\u00fdch hyf. Rozhoduj\u00edc\u00ed byla absence chitinu, ur\u010duj\u00edc\u00ed chemick\u00e9 slo\u017eky v\u0161ech zn\u00e1m\u00fdch hub. <\/p>\n<h3>D\u016fsledky pro \u017eivotn\u00ed historii<\/h3>\n<p>Absence chitinu spolu se struktur\u00e1ln\u00edmi anom\u00e1liemi podporuje hypot\u00e9zu, \u017ee <em>Prototaxites<\/em> nebyl jen neobvyklou houbou, ale samostatnou, nez\u00e1vislou lini\u00ed. To by \u00fa\u010dinn\u011b roz\u0161\u00ed\u0159ilo zn\u00e1m\u00e1 kr\u00e1lovstv\u00ed \u017eivota \u2013 rostliny, zv\u00ed\u0159ata, houby, protisty, bakterie a archaea \u2013 o jednu. Tento objev z\u00e1sadn\u011b m\u011bn\u00ed na\u0161e ch\u00e1p\u00e1n\u00ed ran\u00fdch suchozemsk\u00fdch ekosyst\u00e9m\u016f a diverzifikace \u017eivota. <\/p>\n<h3>&#8220;Podivn\u00fd&#8221; evolu\u010dn\u00ed experiment<\/h3>\n<p>I kdy\u017e se <em>Prototaxites<\/em> uk\u00e1\u017ee jako vysoce divergentn\u00ed houba, studie zd\u016fraz\u0148uje jej\u00ed jedine\u010dnou evolu\u010dn\u00ed cestu. Jak zd\u016fraz\u0148uje Kevin Boyce ze Stanfordsk\u00e9 univerzity, organismus si nez\u00e1visle vyvinul komplexn\u00ed mnohobun\u011b\u010dnost. A\u0165 u\u017e p\u0159edstavuje samostatn\u00e9 kr\u00e1lovstv\u00ed nebo jde o anom\u00e1lii, <em>Prototaxites<\/em> p\u0159edstavuje pozoruhodn\u00fd p\u0159\u00edklad \u017eivota zkoumaj\u00edc\u00edho alternativn\u00ed evolu\u010dn\u00ed strategie. <\/p>\n<blockquote>\n<p>Existence <em>Prototaxit\u016f<\/em> zd\u016fraz\u0148uje, \u017ee \u010dasn\u00fd \u017eivot na Zemi byl mnohem experiment\u00e1ln\u011bj\u0161\u00ed, ne\u017e se d\u0159\u00edve myslelo. Jeho objev n\u00e1s nut\u00ed p\u0159ehodnotit hranice zaveden\u00fdch biologick\u00fdch kr\u00e1lovstv\u00ed a rozmanitosti \u017eivota, kter\u00fd vzkv\u00e9tal p\u0159ed vznikem na\u0161ich modern\u00edch ekosyst\u00e9m\u016f.<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>V\u00edce ne\u017e 170 let si v\u011bdci l\u00e1mali hlavu nad t\u00edm, co byli Prototaxiti \u2013 ob\u0159\u00ed fosilie podobn\u00e9 strom\u016fm, kter\u00e9 p\u0159edch\u00e1zely lesy o miliony let. Tyto struktury, dosahuj\u00edc\u00ed v\u00edce ne\u017e 7,5 metru na v\u00fd\u0161ku, dominovaly krajin\u011b Zem\u011b p\u0159ed v\u00fdvojem modern\u00edch strom\u016f. Navzdory d\u016fkladn\u00e9mu studiu jejich m\u00edsto v d\u011bjin\u00e1ch \u017eivota z\u016fst\u00e1valo z\u00e1hadou \u2013 a\u017e dosud. Star\u00e9 tajemstv\u00ed [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7300,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":""},"categories":[1],"tags":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.schooler.org.ua\/fr\/wp-json\/wp\/v2\/posts\/7302"}],"collection":[{"href":"https:\/\/www.schooler.org.ua\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.schooler.org.ua\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.schooler.org.ua\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.schooler.org.ua\/fr\/wp-json\/wp\/v2\/comments?post=7302"}],"version-history":[{"count":0,"href":"https:\/\/www.schooler.org.ua\/fr\/wp-json\/wp\/v2\/posts\/7302\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.schooler.org.ua\/fr\/wp-json\/wp\/v2\/media\/7300"}],"wp:attachment":[{"href":"https:\/\/www.schooler.org.ua\/fr\/wp-json\/wp\/v2\/media?parent=7302"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.schooler.org.ua\/fr\/wp-json\/wp\/v2\/categories?post=7302"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.schooler.org.ua\/fr\/wp-json\/wp\/v2\/tags?post=7302"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}