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Title:Biosinteza fenolnih spojin v ozkolistnem koščcu (berula erecta) in vitro pod vplivom svetlobe in temperature ter njihovo določanje s hplc-uv : magistrsko delo
Authors:ID Senekovič, Jan (Author)
ID Ambrožič-Dolinšek, Jana (Mentor) More about this mentor... New window
ID Islamčević Razboršek, Maša (Comentor)
Files:.pdf EMAG_Senekovic_Jan_2022.pdf (3,25 MB)
MD5: 93E2049A65888E21DC0A877C71F1AF9B
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:V okviru magistrske naloge smo najprej v tkivni kulturi s tehniko mikropropagacije namnožili rastlinski material vrste ozkolistni koščec (Berula erecta) in ga in vitro izpostavili različnim temperaturnim in svetlobnim razmeram. V nadaljevanju raziskave smo ugotavljali kako različne temperaturne in svetlobne razmere vplivajo na vsebnost celokupnih fenolnih spojin v vzorcih in tudi antioksidativno aktivnost ekstraktov rastlin. Razmnoženi rastlinski material smo po 14 dneh aklimatizacije za 28 dni izpostavili trem različnim temperaturno-svetlobnim pogojem: 23 °C in beli svetlobi, 12 °C in modri svetlobi in 12 °C in rdeči svetlobi. Material smo vzorčili na 14 dni in opazovali spreminjanje sveže mase in suhe mase glede na gojitvene pogoje. V drugi fazi raziskave smo določili najprimernejše ekstrakcijsko topilo za ekstrahiranje fenolnih spojin iz predhodno liofiliziranih rastlinskih vzorcev izpostavljenih različnim temperaturno-svetlobnimi razmeram, izbrali najprimernejšo metodo za določevaje fenolnih spojin s HPLC-UV, z metodo HPLC-UV določali vsebnost izbranih fenolnih kislin in flavonoidov v vzorcih in določili celokupno vsebnost fenolnih spojin v vzorcih, ter določili antioksidativno aktivnost etanolnih ekstraktov vzorcev. Ozkolistni koščec je pridobil največ sveže in suhe biomase 28 dni po končani aklimatizaciji pri 23 ̊C pod belo svetlobo. Kot najprimernejše ekstrakcijsko topilo se je izkazal 70 % etanol. Vseboval je kvercetin, kvercetin-3-beta-D-glukozid, kavno kislino in klorogensko kislino. Etanolni ekstrakti vzorcev ozkolistnega koščca so vsebovali največ klorogenske kisline. Najvišje koncentracije klorogenske kisline so vsebovale rastline, ki so bile gojene 28 dni po aklimatizaciji pri 12 ̊C in pod modro svetlobo. Prav tako so rastline gojene pod temi gojitvenimi pogoji dosegle najvišjo koncentracijo celokupnih fenolnih spojin in njihovi ekstrakti so izkazali najvišjo antioksidativno aktivnost. Ugotovili smo tudi, da bi glede na vsebnost klorogenske kisline v primerjavi z nekaterimi drugimi rastlinskimi vrstami ozkolistni koščec potencialno lahko gojili v namene pridobivanja klorogenske kisline, vendar bi morali gojitvene pogoje s podrobnejšimi raziskavami še dodatno optimizirati.
Keywords:in vitro, Berula erecta, HPLC, sekundarni metaboliti, fenolne spojine, antioksidativnost, fenolne kisline, flavonoidi, rastlinska tkivna kultura
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[J. Senekovič]
Year of publishing:2022
Number of pages:XVI, 124 f.
PID:20.500.12556/DKUM-83214 New window
UDC:581.5:582.795(043.2)
COBISS.SI-ID:127486979 New window
Publication date in DKUM:28.10.2022
Views:1122
Downloads:228
Metadata:XML DC-XML DC-RDF
Categories:FNM
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:28.09.2022

Secondary language

Language:English
Title:Biosynthesis of phenolic compounds in berula erecta in vitro under different light and temperaturconditions and their determination by hplc-uv method
Abstract:As a first part of the master's thesis, we propagated the plant material of Berula erecta in tissue culture using the micropropagation technique and exposed it to different temperature and light conditions. In the second part of the research, we determined how different temperature and light conditions affect the content of total phenolic compounds in the samples and also the antioxidant activity of plant extracts. After 14 days of acclimatization, the propagated plant material was exposed to three different temperature and light conditions for 28 days: 23 °C and white light, 12 °C and blue light, and 12 °C and red light. We sampled the material every 14 days and observed changes in fresh weight and dry weight. In the second phase of the research, we determined the most suitable extraction solvent for extracting phenolic compounds from previously lyophilized plant samples exposed to different temperature and light conditions, selected the most suitable method for determining phenolic compounds with HPLC-UV, determined the content of selected phenolic acids and flavonoids in the HPLC-UV method samples and determined the total content of phenolic compounds in the samples, and determined the antioxidant activity of the ethanol extracts. Berula erecta obtained the most fresh and dry biomass 28 days after the end of acclimatization at 23 ̊C under white light. 70% ethanol proved to be the most suitable extraction solvent. Extracts contained quercetin, quercetin-3-beta-D-glucoside, caffeic acid and chlorogenic acid. Ethanol extracts of Berula erecta contained the most chlorogenic acid. Plants grown 28 days after acclimatization at 12 ̊C and under blue light contained the highest concentrations of chlorogenic acid. Also, plants grown under these growing conditions reached the highest concentration of total phenolic compounds and their extracts showed the highest antioxidant activity. We also found that, considering the content of chlorogenic acid, compared to some other plant species, Berula erecta could potentially be cultivated for the purpose of obtaining chlorogenic acid, but the cultivation conditions should be further optimized with more detailed research.
Keywords:in vitro, Berula erecta, HPLC, secondary metabolites, phenolic compounds, antioxidant activity, phenolic acids, flavonoids, plant tissue culture


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