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Vloga strigolaktonov pri adventivnem razvoju koreninskega sistema
Kupšek, Katarina (Author), Osterc, Gregor (Mentor) More about this mentor... This link opens in a new window

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Abstract
Adventivni ali nadomestni koreninski sistem predstavlja korenine, ki se razvijejo iz nekoreninskega tkiva. Lahko so posledica običajnega razvoja rastline ali pa se razvijejo kot odgovor na okoljski stres (poplavljanje, pomanjkanje hranil, ranitev tkiva). Okoljski stres je prav tisti dejavnik, ki med drugimi tudi pri procesih vegetativnega razmnoževanja (ne glede na razmnoževalno metodo) privede do nastanka in razvoja koreninskega sistema pri novih rastlinah. Pri razvoju NKS-ja imajo pomembno vlogo rastlinski hormoni, kot so avksini, etilen, jasmonska kislina in strigolaktoni. Strigolaktoni so rastlinski hormoni, ki so pomembni pri razvoju in rasti rastline, pri simbiotskih in parazitskih odnosih med rastlino in drugimi organizmi. Strigolaktoni imajo pomembno vlogo pri razvoju, rasti in obliki NKS-ja. Zaviralno vplivajo na arhitekturo in gostoto NKS-ja, kar pomeni, da vplivajo na manjše število nadomestnih korenin, ki so manj razrastle. Strigolaktoni pozitivno vplivajo na procese v rizosferi, ker omogočajo mutualistične odnose med gostiteljsko rastlino in glivo. Delovanje strigolaktonov je odvisno od njihove sinteze, transporta in koncentracije. Strigolaktoni delujejo predvsem v povezavi z avksini, kjer je vpliv odvisen od koncentracije obeh hormonov. V diplomskem delu je povzeto spolno in nespolno razmnoževanje rastlin, fiziološki procesi med razvojem NKS-ja ter vloga rastlinskih hormonov predvsem strigolaktonov pri razvoju nadomestnega koreninskega sistema.

Language:Slovenian
Keywords:razmnoževanje rastlin, adventivne korenine, rastlinski hormoni, strigolaktoni
Work type:Bachelor thesis/paper (mb11)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2017
Publisher:[K. Kupšek]
UDC:581.144.2:631.532:631.811.98:581.192(043.2)
COBISS.SI-ID:8781945 This link opens in a new window
Views:886
Downloads:369
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Secondary language

Language:English
Title:The role of strigolactones in the development of adventitve root system
Abstract:
Adventive root system represents the roots that develop from the non-root tissue. That may happen due to the usual formation of plants or they develop in response to the environmental stress (flooding, nutrient deficiency, tissue damage). Environmental stress is precisely the factor, which, among other things, in the processes of vegetative propagation (regardless of the propagation method) causes the formation of the root system in new plants. Phytohormones such as auxinis, ethylene, jasmonic acid in strigolactones play an important role in the formation of AR. Strigolactones are phytohormones that are important in the formation of plants, in symbiotic and parasitic relationships between plants in other organisms. Strigolactones play an important role in the formation, growth in the form of AR. They have a detrimental effect on the architecture and density of the ARF, which means that they influence the smaller number of replacement roots that are less elaborate. Strigolactones have a positive effect on the process in the rhizosphere because they allow interactions between the host plant in the fungus. The action of strigolactones depends on their synthesis, transport and concentration. Strigolactones act primarily in association with auxins, where the effect is dependent on the concentration of both hormones. In the diploma thesis is summarized sexual and asxual propagation of plants, physiological processes during the formation of the AR and the role of plant hormones, especially strigolactones in the formation of the adventious root formation.

Keywords:Plant propagation, adventitious roots, phytohormone, strigolactones

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