1. Ectomycorrhizal symbionts of silver fir (Abies alba Mill.) in SloveniaTina Unuk Nahberger, Hojka Kraigher, Tine Grebencs, 2024, original scientific article Abstract: Ectomycorrhizal symbionts of silver fir have been in Slovenia rarely analyzed and identified, thereby little is known about their diversity and distribution across Slovenia. The aim of this study was to identify ectomycorrhizal fungal symbionts of silver fir in silver fir natural distribution area in Slovenia. Ectomycorrhizal fungi were identified based on morphological and anatomical descriptions and by ITS DNA barcoding. Altogether we identified 86 different ectomycorrhizal symbionts of silver fir, many of them were in symbiosis with silver fir, in our study identified for the first-time. The most abundant ECM fungal taxa were assigned to Russula, Tomentella and Lactarius genus.
Keywords: silver fir, ectomycorrhizal symbionts, ITS barcoding, Slovenia
Published in DiRROS: 09.01.2026; Views: 238; Downloads: 101
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3. Cultivation and utilization of Poplars, Willows and other fast-growing trees in Slovenia : report of the National poplar commission, time period: 2020-2023Gregor Božič, Andreja Ferreira, Anže Martin Pintar, Gordana Beltram, Marko Kovač, Darja Istenič, Marjana Westergren, Nikica Ogris, Barbara Piškur, Hojka Kraigher, Aleksander Koren, Tadej Törnar, Anja Cigan, Špela Ščap, Katja Kavčič Sonnenschein, Simon Veberič, Andraž Čarni, 2024, treatise, preliminary study, study Keywords: Poplar, Willow, Black Walnut, Black Locust, international commission, FAO, national report, questionnaire, genetics, forest protection, legislation, categorisation, forest products, ecology, Slovenia
Published in DiRROS: 08.12.2025; Views: 273; Downloads: 125
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6. Kako naravna obnova jelovo-bukovega gozda vpliva na sestavo talnega mikrobioma?Nataša Šibanc, Petr Baldrian, Vendula Brabcová, Janez Kermavnar, Hojka Kraigher, Lado Kutnar, Tijana Martinović, Martina Štursová, Tanja Mrak, 2025, published scientific conference contribution abstract Keywords: naravna obnova, gozdovi, talni mikrobiom
Published in DiRROS: 27.11.2025; Views: 242; Downloads: 70
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7. Low but significant evolutionary potential for growth, phenology and reproduction traits in European beechMarjana Westergren, Juliette Archambeau, Marko Bajc, Rok Damjanić, Adélaïde Theraroz, Hojka Kraigher, Sylvie Oddou-Muratorio, Santiago C. González-Martínez, 2023, complete scientific database of research data Abstract: Local survival of forest tree populations under climate change depends on existing genetic variation and their adaptability to changing environments. Responses to selection were studied in European beech (Fagus sylvatica) under field conditions. A total of 1,087 adult trees, seeds, one-year-old seedlings, and established multiyear saplings were genotyped with 16 nuSSRs. Adult trees were assessed for phenotypic traits related to growth, phenology and reproduction. Parentage and paternity analyses were used to estimate effective female and male fecundity as a proxy of fitness and showed that few parents contributed to successful regeneration. Selection gradients were estimated from the relationship between traits and fecundity, while heritability and evolvability were estimated using mixed models and the breeder’s equation. Larger trees bearing more fruit and early male flowering had higher total fecundity, while trees with longer growth season had lower total fecundity (directional selection). Stabilising selection on spring phenology was found for female fecundity, highlighting the role of late frosts as a selection driver. Selection gradients for other traits varied between measurement years and the offspring cohort used to estimate parental fecundity. Compared to other studies in natural populations, we found low to moderate heritability and evolvability for most traits. Response to selection was higher for growth than for budburst, leaf senescence or reproduction traits, reflecting more consistent selection gradients across years and sex functions, and higher phenotypic variability in the population. Our study provides empirical evidence suggesting that populations of long-lived organisms such as forest trees can adapt locally, even at short-time scales.
Keywords: climate change, Fagus sylvatica, heritability, in situ adaptation, response to selection, selection gradients
Published in DiRROS: 10.09.2025; Views: 349; Downloads: 193
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8. Mycelial communities associated with Ostrya carpinifolia, Quercus pubescens and Pinus nigra in a patchy Sub-Mediterranean Karst woodlandTanja Mrak, Philip Alan Brailey-Crane, Nataša Šibanc, Tijana Martinović, Jožica Gričar, Hojka Kraigher, 2025, original scientific article Abstract: Common mycorrhizal networks of ectomycorrhizal (EcM) fungi could be of great benefit to trees growing in the shallow soils of Sub-Mediterranean Karst ecosystems, potentially playing a crucial role in the survival of trees in this harsh environment. The first step to confirm the existence of such networks is to assess the extent and nature of symbiont sharing in the mycelial community. To address this question, we incubated in-growth mesh bags under the native Ostrya carpinifolia and Quercus pubescens, and the non-native Pinus nigra, over two consecutive years. In Q. pubescens and P. nigra, but not in O. carpinifolia, mycelium production was significantly higher in the year with higher spring precipitation, indicating the influence of climatic conditions, but also the identity of the host tree. We observed a complex interaction between tree species and sampling year in structuring the composition and diversity of mycelial communities. Local environmental conditions contributed additionally and were responsible for 21.46% of the community variation between samples. Although ~ 70% of fungal operational taxonomic units were shared across the studied tree species, distinct community compositions emerged, emphasizing the role of host tree specificity. Q. pubescens exhibited greater stability in EcM richness between sampling years, whereas P. nigra showed lower EcM richness, likely due to limited availability of compatible fungi and reliance on introduced fungal partners. Additionally, differences in EcM fungal exploration strategies were observed. O. carpinifolia and Q. pubescens mainly hosted non-specific EcM fungi with short distance exploration types. In contrast, EcM fungi of P. nigra had higher spatial spread, and were predominantly conifer specific. Overall, our results emphasize the importance of host specificity, soil parameters, spatial proximity, and climatic variability for the structuring of mycelial communities in fragmented forests.
Keywords: ectomycorrhizal fungi, mesh bags, exploration strategies, hop-hornbeam, Pubescent oak, European black pine
Published in DiRROS: 30.07.2025; Views: 495; Downloads: 322
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9. Raznolikost in sestava talnega mikrobioma med procesi naravne obnove v jelovo-bukovem gozduNataša Šibanc, Petr Baldrian, Vendula Brabcová, Janez Kermavnar, Hojka Kraigher, Lado Kutnar, Tijana Martinović, Martina Štursová, Tanja Mrak, 2025, published scientific conference contribution abstract Keywords: mikrobne združbe, HTS, sečnja, bukev, naravna obnova
Published in DiRROS: 05.06.2025; Views: 656; Downloads: 229
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