magistrsko delo
Alenka Peternelj (Author), Maja Mikulič Petkovšek (Mentor), Zalika Črepinšek (Thesis defence commission member), Damijana Kastelec (Thesis defence commission member)

Abstract

Japonski dresnik (Fallopia japonica (Houtt.) Ronse Decraene) velja za najbolj problematično tujerodno invazivno rastlinsko vrsto v Evropi. Znan je predvsem po sposobnosti agresivnega širjenja z vegetativnim razmnoževanjem. Ker pa deluje tudi močno alelopatsko, nas je zanimalo, kako izvlečki nadzemnih delov japonskega dresnika delujejo na kalitev in rast semen ajde ter inkarnatke ter katere fenolne snovi vsebuje ekstrakt. V ekstraktu japonskega dresnika smo analizirali 63 fenolnih snovi iz 7 različnih fenolnih skupin, kjer so po vsebnosti prevladovali flavanoli. Ugotovili smo, da je metanol učinkovitejše topilo za ekstrakcijo fenolov v primerjavi z vodo. Na vsebnost fenolov v ekstraktu vpliva tudi termin nabiranja rastlinskega materiala. Pri analizi vodnih pripravkov smo potrdili, da na vsebnost fenolnih snovi v ekstraktu značilno vpliva tudi koncentracija ekstrakta. Vodni izvlečki japonskega dresnika na kalitev semen ajde in inkarnatke niso imeli značilnega vpliva, so pa močno vplivali na rast semen. Pri inkarnatki je nižja koncentracija uporabljenega pripravka povzročila izdolževanje rastlinic, višja koncentracija pa zaviranje rasti. Pri ajdi izdolževanja nismo opazili, je pa v nekaterih terminih že nižja koncentracija vodnega ekstrakta japonskega dresnika povzročila zaviranje rasti.

Keywords

japonski dresnik;alelopatija;fenolne snovi;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [A. Hrovat]
UDC: 582.665:547.56:631.547.1(043.2)
COBISS: 170362115 Link will open in a new window
Views: 17
Downloads: 9
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Other data

Secondary language: English
Secondary title: Effect of different extracts of japanese knotweed (Fallopia japonica (Houtt.) Ronse Decraene) on selected plant species seed germination under laboratory conditions
Secondary abstract: Japanese knotweed (Fallopia japonica (Houtt.) Ronse Decraene) is considered the most problematic non-native invasive plant species in Europe. It is known primarily for its ability to spread aggressively through vegetative reproduction. However, because it also has a strong allelopathic effect, we were interested in how extracts from the aerial parts of Japanese knotweed affect the germination and growth of buckwheat and incarnate seeds and what phenolic substances the extract contains. We analyzed 63 phenolic substances from 7 different phenolic groups in the extract of Japanese knotweed, and flavanols predominated in terms of content. We found that methanol is a more effective solvent for the extraction of phenolics than water. The phenolic content of the extract is also affected by the time of sampling of the plant material. We confirmed that the phenolic content of the aqueous extract is also significantly affected by the concentration of the extract. Aqueous extracts of Japanese knotweed had no significant effect on the germination of buckwheat and crimson clover seeds, but they had a significant effect on seedling growth. Lower extract concentrations resulted in elongation of crimson clover seedlings, while higher concentrations inhibited their growth. No elongation was observed in buckwheat, but in some cases even a lower concentration of the water extract of Japanese knotweed resulted in growth inhibition.
Secondary keywords: Fallopia japonica;
Type (COBISS): Master's thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za agronomijo
Pages: 1 spletni vir (1 datoteka PDF (X, 43 str., [19] str. pril.))
ID: 20488333