magistrsko delo
Alenka Novak (Author), Katarina Vogel-Mikuš (Mentor), Zlata Luthar (Thesis defence commission member)

Abstract

Za namene preprečevanja rasti patogenih gliv, kontaminacije pridelkov z mikotoksini in fungicidi, zmanjševanja izgub pred in po žetvi ter izboljšanja kalitve in rasti rastlin, je ključnega pomena razviti in uporabljati okolju prijazne tehnologije pridelave in predelave hrane. Ena izmed takšnih inovativnih metod je uporaba hladne plinske plazme (HP). V naši raziskavi smo primerjali učinke hladne kisikove oz. dušikove plazme na kaljivost in glivno združbo semen tatarske ajde, z namenom najti najbolj optimalen plin (oz. mešanico plinov) ter čas obdelave s HP. Rezultati naše raziskave niso pokazali nobenih pozitivnih vplivov na izboljšanje kalitve semen tatarske ajde, ravno obratno, daljši časi obdelave s HP so povzročili tako statistično značilen (p < 0,05) upad kalitve kot tudi podaljšanje povprečnega časa kalitve. Do najmanjšega negativnega učinka je prišlo pri obdelavah, kjer je bil za delovni plin uporabljen le dušik. Skupno smo izolirali glive iz 11 rodov, ki jih lahko uvrstimo v 8 družin. Rodovi Alternaria, Epicoccum, Fusarium in Pseudopithomyces, ki so predstavljali 90 % vseh izoliranih gliv, so bili še vedno prisotni po vseh obdelavah. V nasprotju z dognanji nekaterih drugih avtorjev v naši raziskavi nismo opazili vpliva na zmanjšanje pojavnosti ali raznovrstnost gliv, vseeno pa smo pri eni izmed obdelav, ¾ O2 za 90 s, opazili statistično značilen upad deleža z glivami okuženih semen ter zmanjšanje povprečnega števila morfotipov na eno seme.

Keywords

dekontaminacija;glivna združba;hladna plazma;kalitev;tatarska ajda;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [A. Novak]
UDC: 602:632.93:631.53.02:631.547.1(043.2)
COBISS: 165001731 Link will open in a new window
Views: 62
Downloads: 14
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Other data

Secondary language: English
Secondary title: Effects of cold oxygen and nitrogen plasma treatment on germination and fungal community structure of tartary buckwheat (Fagopyrum tataricum) seeds
Secondary abstract: To prevent fungal growth, mycotoxin and fungicide contamination in crops, while trying to minimize pre- or postharvest losses, and avoid poor germination or plant growth due to fungal diseases – it's crucial to develop and utilize environmentally friendly food production and processing technologies. One such innovative method is cold plasma. In our study, we investigated the effects of cold oxygen or nitrogen plasma on the germination and fungal community structure of Tartary buckwheat seeds with the aim of identifying the most optimal gas (or gas mixture) and exposure time to cold plasma. However, the results of our research did not indicate any positive effects on improving germination of Tartary buckwheat seeds. On the contrary, longer treatments resulted in a statistically significant (p < 0.05) decline in germination rates and a prolonged mean germination time. The least detrimental effect was observed in treatments where only nitrogen was used as the working gas. Overall, we isolated fungi from 11 genera, classified into 8 families. Alternaria, Epicoccum, Fusarium and Pseudopithomyces, which accounted for 90 % of all isolated fungi, were present in all treatments. In contrast to the findings of other authors, we did not observe an impact on fungal frequency or diversity in our study, however, in one of the treatments, ¾ O2 for 90 s, we observed a statistically significant decrease in fungi-infected seeds and a reduction in the average number of morphotypes per seed.
Secondary keywords: decontamination;fungal community;cold plasma;germination;Tartary buckwheat;
Type (COBISS): Master's thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Študij biotehnologije
Pages: 1 spletni vir (1 datoteka PDF (XI, 65 str., [1] str. pril.))
ID: 19941475