1. Fecal short-chain fatty acids are associated with obesity in gestational diabetesKatja Molan, Jerneja Ambrožič, Matevž Likar, Draženka Pongrac Barlovič, Darja Žgur-Bertok, Marjanca Starčič Erjavec, 2025, izvirni znanstveni članek Povzetek: Background: Short-chain fatty acids (SCFAs), which are produced by the microbial fermentation of undigested carbohydrates, play an important role in the metabolism and physiology of the host. SCFAs are involved in the regulation of maternal metabolism during pregnancy and influence weight gain, glucose metabolism, and metabolic hormones. Methods: In 2017, women who were treated for gestational diabetes mellitus (GDM) at the University Medical Centre Ljubljana were invited to participate in a longitudinal study. A total of 45 women were included in this study and comprehensively phenotyped. During the second and third trimester of pregnancy, the women with GDM provided fecal samples for SCFA analysis. The samples were analyzed by high-performance liquid chromatography for the simultaneous determination of acetate, propionate, and butyrate. Results: SCFA concentrations in feces differed between overweight/obese and normal-weight women with GDM. Acetate and propionate concentrations were significantly higher in pregnant women who were overweight or obese before pregnancy compared to normal-weight women but butyrate concentrations were not. Butyrate was elevated in the third trimester in the group with excessive gestational weight gain. Conclusions: The relationship between SCFAs and obesity is complex, and the association between SCFAs and GDM remains to be clarified. Regardless of the conflicting publications on the role of SCFAs, our study showed that higher acetate and propionate levels were associated with the weight categories of overweight or obesity before pregnancy and higher butyrate levels were associated with excessive gestational weight gain.
Ključne besede: fecal SCFA, pregnancy, gestational diabetes mellitus, preconception BMI, gestational weight gain
Objavljeno v DiRROS: 01.12.2025; Ogledov: 76; Prenosov: 42
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2. New insights into structures and composition of plant food materialsIvan Kreft, Paula Pongrac, Meiliang Zhou, Katarina Vogel-Mikuš, Primož Pelicon, Primož Vavpetič, Marijan Nečemer, Johannes Teun van Elteren, Marjana Regvar, Matevž Likar, Mateja Germ, Aleksandra Golob, Alenka Gaberščik, Igor Pravst, Anita Kušar, Blanka Vombergar, Vida Škrabanja, Darja Kocjan Ačko, Zlata Luthar, 2017, pregledni znanstveni članek Ključne besede: micro-PIXE, micro-XRF, SEM, transmission electron microscopy, laser ablation, food composition, plant structures
Objavljeno v DiRROS: 24.11.2025; Ogledov: 124; Prenosov: 73
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3. Breeding buckwheat for increased levels of rutin, quercetin and other bioactive compounds with potential antiviral effectsZlata Luthar, Mateja Germ, Matevž Likar, Aleksandra Golob, Katarina Vogel-Mikuš, Paula Pongrac, Anita Kušar, Igor Pravst, Ivan Kreft, 2020, pregledni znanstveni članek Objavljeno v DiRROS: 24.11.2025; Ogledov: 92; Prenosov: 58
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4. Nodulation performance and agronomic traits of European common bean (Phaseolus vulgaris L.) genetic resourcesEva Plestenjak, Vladimir Meglič, Lovro Sinkovič, Matevž Likar, Marjana Regvar, Barbara Pipan, 2024, izvirni znanstveni članek Povzetek: Field production of common beans benefit from root microbial associations, although they are generally considered to be weaker nitrogen fixers than other legumes. Therefore, the number of nodules on the roots of 64 accessions of the European common bean (Phaseolus vulgaris L.) and the relationship between the number of nodules per accession and other plant characteristics (growth type, earliness, seed yield, and total nitrogen content in seeds) were studied. The results indicated that growth type and earliness influenced the number of nodules per accession (the contributions of principal component analysis were 34.9% for Dim1 and 29.8% for Dim2). The average number of nodules per accession with indeterminate growth type was almost five times higher (20.1) than for accessions with determinate growth type (4.4). Common bean accessions with regular growth cycle length had the highest number of nodules (21.9). In contrast, nodulation efficiency, measured as seed yield per plant and total nitrogen content in seeds, were not correlated with the number of nodules per accession (correlation analysis, r < 0.1). Consequently, data on the nodulation efficiency of European common bean accessions are important for breeding programmes in conjunction with other agronomically important traits for commercial and/or organic cultivation systems.
Ključne besede: agronomic traits, common bean, nitrogen fixation, nodules, symbiotic efficiency
Objavljeno v DiRROS: 30.09.2024; Ogledov: 1004; Prenosov: 262
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5. Buckwheat milling waste effects on root morphology and mycorrhization of Silver fir seedlings inoculated with Black Summer Truffle (Tuber aestivum Vittad.)Tina Unuk Nahberger, Tine Grebenc, Daniel Žlindra, Tanja Mrak, Matevž Likar, Hojka Kraigher, Zlata Luthar, 2022, izvirni znanstveni članek Povzetek: Large amounts of buckwheat waste are generated annually by the industry and are used in several different ways. To date, there has been little research regarding its suitability as a medium for growing seedlings in nurseries. The aim of this study was therefore to analyze the suitability of common and Tartary buckwheat wastes (brans and husks) as media used for raising seedlings. A pot experiment with five different treatments was carried out, in which silver fir root parameters were analyzed and compared 6 and 12 months after summer truffle-spore inoculation. A significantly higher concentration of the antioxidant rutin was confirmed in Tartary buckwheat bran compared to other buckwheat waste used. We also confirmed a significantly positive effect of added Tartary buckwheat husks on specific root length, root tip density, and specific root tip density compared to added common buckwheat husks or Tartary buckwheat bran, for which a significantly negative effect on branching density was confirmed. A significantly negative effect of added buckwheat husks and Tartary buckwheat bran was confirmed for summer truffle mycorrhization level.
Ključne besede: buckwheat waste, root growth, summer truffle, forest nursery, silver fir, inoculation with ectomycorrhizal fungi
Objavljeno v DiRROS: 09.02.2022; Ogledov: 1988; Prenosov: 1304
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6. Elemental composition of wheat, common buckwheat, and tartary buckwheat grains under conventional productionLea Orožen, Katarina Vogel-Mikuš, Matevž Likar, Marijan Nečemer, Peter Kump, Marjana Regvar, 2012, izvirni znanstveni članek Ključne besede: dietary reference intake, energy dispersive X-ray fluorescence spectrometry, metals, minerals, trace elements, total reflection X-ray fluorescence spectrometry
Objavljeno v DiRROS: 11.07.2017; Ogledov: 5323; Prenosov: 2372
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