Jmel\u00ed je fascinuj\u00edc\u00ed rostlina, kter\u00e1 je nejl\u00e9pe zn\u00e1m\u00e1 svou rol\u00ed ve sv\u00e1te\u010dn\u00edch oslav\u00e1ch. Krom\u011b sv\u00e9ho dekorativn\u00edho vyu\u017eit\u00ed je v\u0161ak jmel\u00ed botanick\u00fdm divem s jedine\u010dn\u00fdm \u017eivotn\u00edm stylem a ekologick\u00fdm v\u00fdznamem.<\/p>\n\n
Jmel\u00ed jsou parazitick\u00e9 rostliny, co\u017e znamen\u00e1, \u017ee z\u00edsk\u00e1vaj\u00ed vodu a \u017eiviny z jin\u00fdch rostlin, zn\u00e1m\u00fdch jako jejich hostitel\u00e9. Toho dosahuj\u00ed prost\u0159ednictv\u00edm specializovan\u00fdch struktur naz\u00fdvan\u00fdch haustoria, kter\u00e9 pronikaj\u00ed do tk\u00e1n\u00ed hostitele a p\u0159ipojuj\u00ed se k jeho c\u00e9vn\u00edmu syst\u00e9mu.<\/p>\n\n
Jmel\u00ed maj\u00ed rozmanit\u00e9 haustorie, kter\u00e9 odr\u00e1\u017eej\u00ed jejich r\u016fznorod\u00e9 parazitick\u00e9 strategie. N\u011bkter\u00e9 tvo\u0159\u00ed zplo\u0161t\u011bl\u00e9 podlo\u017eky, kter\u00e9 obklopuj\u00ed v\u011btve hostitele, zat\u00edmco jin\u00e9 vyv\u00edjej\u00ed \u201ed\u0159ev\u011bn\u00e9 r\u016f\u017ee\u201c nebo vys\u00edlaj\u00ed vinn\u00e9 roz\u0161\u00ed\u0159en\u00ed. N\u011bkter\u00e9 dokonce vytv\u00e1\u0159ej\u00ed vl\u00e1knit\u00e9 \u201ek\u016frov\u00e9 prameny\u201c, kter\u00e9 se \u0161\u00ed\u0159\u00ed pod k\u016frou hostitele a vyv\u00edjej\u00ed mal\u00e9 ponory, kter\u00e9 se p\u0159ipojuj\u00ed k hostitelovu potrub\u00ed.<\/p>\n\n
Po cel\u00e9m sv\u011bt\u011b existuje p\u0159es tis\u00edc druh\u016f jmel\u00ed. Rostou na v\u0161ech kontinentech krom\u011b Antarktidy a ob\u00fdvaj\u00ed \u0161irokou \u0161k\u00e1lu prost\u0159ed\u00ed, od pou\u0161t\u00ed po de\u0161tn\u00e9 pralesy.<\/p>\n\n
P\u0159es svou parazitickou povahu hraje jmel\u00ed z\u00e1sadn\u00ed ekologickou roli. Poskytuj\u00ed potravu, \u00fakryt a lovi\u0161t\u011b pro zv\u00ed\u0159ata, v\u010detn\u011b pt\u00e1k\u016f, mot\u00fdl\u016f a savc\u016f. Spadan\u00e9 listy jmel\u00ed uvol\u0148uj\u00ed \u017eiviny do lesn\u00ed p\u016fdy, co\u017e prosp\u00edv\u00e1 dal\u0161\u00edm rostlin\u00e1m a hmyzu.<\/p>\n\n
Semena jmel\u00ed jsou rozptylov\u00e1na pt\u00e1ky, kte\u0159\u00ed jed\u00ed bobule a vylu\u010duj\u00ed semena. N\u011bkter\u00e9 druhy jmel\u00ed vyvinuly v\u00fdbu\u0161n\u00e9 plody, kter\u00e9 vrhaj\u00ed sv\u00e1 semena sm\u011brem k bl\u00edzk\u00fdm strom\u016fm. Mnoho kv\u011bt\u016f jmel\u00ed je bohat\u00fdch na nektar a p\u0159itahuje pt\u00e1ky a hmyz k opylov\u00e1n\u00ed.<\/p>\n\n
Jmel\u00ed je pestr\u00e1 skupina rostlin, kter\u00e1 se vyvinula nez\u00e1visle alespo\u0148 p\u011btkr\u00e1t v r\u016fzn\u00fdch rostlinn\u00fdch \u010deled\u00edch. V\u0161ichni maj\u00ed p\u0159edky, kte\u0159\u00ed byli ko\u0159enov\u00fdmi parazity, ale od t\u00e9 doby p\u0159e\u0161li na vzdu\u0161n\u00fd parazitick\u00fd \u017eivotn\u00ed styl.<\/p>\n\n
Jmel\u00ed lze nal\u00e9zt v r\u016fzn\u00fdch stanovi\u0161t\u00edch, v\u010detn\u011b les\u016f, les\u00edk\u016f a k\u0159ovin. Mohou m\u00edt v\u00fdznamn\u00fd dopad na sv\u00e9 hostitelsk\u00e9 stromy a okoln\u00ed ekosyst\u00e9m. N\u011bkter\u00e9 druhy jmel\u00ed mohou zp\u016fsobit po\u0161kozen\u00ed strom\u016f d\u016fle\u017eit\u00fdch pro zahradnictv\u00ed, ale v\u011bt\u0161ina z nich nep\u0159edstavuje hrozbu pro plodiny.<\/p>\n\n
Jmel\u00ed je zaj\u00edmav\u00e1 a rozmanit\u00e1 rostlina s jedine\u010dn\u00fdm parazitick\u00fdm \u017eivotn\u00edm stylem. Jeho ekologick\u00fd v\u00fdznam, evolu\u010dn\u00ed historie a fascinuj\u00edc\u00ed adaptace z n\u011bj \u010din\u00ed poutav\u00e9 t\u00e9ma studia pro v\u011bdce i milovn\u00edky p\u0159\u00edrody.<\/p>","protected":false},"excerpt":{"rendered":"
Jmel\u00ed: Parazitick\u00e1 rostlina s unik\u00e1tn\u00edm \u017eivotn\u00edm stylem Jmel\u00ed je fascinuj\u00edc\u00ed rostlina, kter\u00e1 je nejl\u00e9pe zn\u00e1m\u00e1 svou rol\u00ed ve sv\u00e1te\u010dn\u00edch oslav\u00e1ch. Krom\u011b sv\u00e9ho dekorativn\u00edho vyu\u017eit\u00ed je v\u0161ak jmel\u00ed botanick\u00fdm divem s…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1823],"tags":[219,5311,5312,252,449],"class_list":["post-2646","post","type-post","status-publish","format-standard","hentry","category-botany","tag-ecology","tag-mistletoe","tag-parasitism","tag-nature","tag-plant-science"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/2646","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=2646"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/2646\/revisions"}],"predecessor-version":[{"id":2647,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/2646\/revisions\/2647"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=2646"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=2646"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=2646"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}