20.500.12556/RUL-138404 Vzdrževanje juvenilnosti matičnih rastlin pri okrasni češnji Prunus subhirtela 'Autumnalis' Maintaining the juvenility of the mothers plants of ornamental cherries Prunus subhirtela 'Autumnalis' Namen diplomskega dela je bil proučiti, kakšna je juvenilnost pri treh predhodno različno razmnoženih rastlinah in po koliko letih se le-ta še ohranja. Kot matični material smo uporabili okrasno češnjo Prunus subhirtella sorte ´Autumnalis´. Potaknjence smo nabrali na treh tipih matičnih rastlin, na fiziološko starem drevesu (60 let stara drevesa) in na juvenilnih rastlinah, ki so bile predhodno razmnožene s potaknjenci in z in vitro metodo razmnoževanja (17 let stara drevesa). Ovrednotili smo delež ukoreninjenih in neukoreninjenih potaknjencev, delež propadlih a ukoreninjenih potaknjencev, dolžino korenin, število korenin, dolžino poganjkov, število poganjkov, razvoj korenin s kalusom, akrobazalno in bazalno koreninjenje. Najbolje so se koreninili potaknjenci katerih matična rastlina je bila predhodno razmnožena s potaknjenci, 95,0 %. Po koreninjenju je največ potaknjencev propadlo pri stari matični rastlini, in sicer 21,7 %. Potaknjenci fiziološko stare matične rastline so pokazali največji delež bazalnega koreninjenja, in sicer 89,7 %. Potaknjenci, katerih matična rastlina je bila razmnožena s potaknjenci so pokazali najboljše rezultate akrobazalnega koreninjenja s 44,2 %. Največji delež korenin s kalusom so razvili potaknjenci fiziološko stare matične rastline z 52,9 %. Največje število poganjkov se je razvilo pri potaknjencih, katerih matična rastlina je razmnožena s potaknjenci, in sicer povprečno 6 poganjkov. Potaknjenci, katerih matična rastlina je bila predhodno razmnožena s potaknjenci, so razvili povprečno najdaljše na novo nastale poganjke s skupno povprečno dolžino 99,5cm. Največ glavnih korenin so povprečno razvili potaknjenci, katerih matična rastlina je bila razmnožena s potaknjenci, in sicer 7. Najdaljši koreninski šop so povprečno razvili potaknjenci predhodno razmnoženi z in vitro metodo, in sicer 24,7 cm. The aim of this thesis was to determine the juvenility of three differently propagated plants and the juvenility duration. The ornamental cherry cultivar Prunus subhirtella 'Autumnalis' served as the starting material. Cuttings were taken from three different types of mother plants. The first mother plant was a physiologically old ornamental cherry (60 years old). The second group of mother plants were ornamental cherries grown from cuttings. The third group of mother plants were ornamental cherries grown in vitro. The trees in the second and third groups were 17 years old. The percentage of rooted and unrooted cuttings, percentage of rooted but failed cuttings, root length, number of roots, length of cuttings, number of cuttings, root development with callus, acrobasal rooting and basal rooting were estimated. The highest rooting rate was found in cuttings whose mother plants were propagated with cuttings, namely 95%. Most of the failed cuttings were from old trees, namely 21.7%. Cuttings from physiologically old trees had the most basal rooting. Cuttings whose mother plant was propagated with cuttings had the highest acrobasal rooting, namely 44.2%. Cuttings from physiologically old trees had the highest percentage of developed roots, 52.9%. Cuttings whose mother plant was propagated with cuttings had the highest number of shoots, the longest average cutting length and the highest number of main roots, namely 6, 99.5cm and 7, respectively. Cuttings whose parents were propagated in vitro developed the longest root cluster, namely 24.7cm. okrasna češnja Prunus subhirtella ´Autumnalis´ zeleni potaknjenci fiziološko staro drevo in vitro ornamental cherry Prunus subhirtella ´Autumnalis´ green cuttings physiologically old tree in vitro true false false [R. Komac] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2022-07-20 07:15:39 2022-07-20 07:15:50 2022-09-15 04:16:43 0000-00-00 00:00:00 2022 0 Ljubljana 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 635.924:631.535:581.14(043.2) 204805 115570947 23255.pdf 23255.pdf 1 80D270D62F04F947725EEB0D564C5BB1 50825db9fb9d20adae643e4e3fcc1fe19382ed631715acba44fcbe5e726328fe c58b93b5-07ea-11ed-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=158718 Biotehniška fakulteta 0 0 0