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172. Molekularna analiza bioloških vzorcev : SOP FIGE MET 001 : velja od 01.03.2004Tine Grebenc, Hojka Kraigher, 2004, treatise, preliminary study, study Keywords: tehnična navodila, križanci, identifikacija, gozdarstvo, določanje genotipov, molekularne baze
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173. Genetic differentiation of the Western Capercaillie highlights the importance of South-Eastern Europe for understanding the species phylogeographyMarko Bajc, Miran Čas, Dalibor Ballian, S. Kunovac, Goran Zubić, Marijan Grubešić, Petr Zhelev, Ladislav Paule, Tine Grebenc, Hojka Kraigher, 2011, original scientific article Published in DiRROS: 12.07.2017; Views: 2967; Downloads: 1329
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175. Morphological variability of Fraxinus angustifolia Vahl in the north-western BalkansKristjan Jarni, Marjana Westergren, Hojka Kraigher, Robert Brus, 2011, original scientific article Abstract: Fraxinus angustifolia Vahl is a species native in the north-western Balkans, where it has a divided range. Most of its range is
located in flood-prone riparian sites in the Pannonian plain but the species is also found on humid sites along some rivers in the
Submediterranean region. We analysed morphologic variation within and between five populations (14 trees/population) located in the Subpannonian and Submediterranean region of Slovenia. Thirty two characters were assessed on ca. 80 leaves from
each tree which were divided depending on exposure to sunlight (sun and shade leaves), and 8 traits on each fruit (ca. 50 fruits/
tree). A hierarchically designed experiment using analysis of variance confirmed the significant contribution of all the analysed
hierarchical levels of variation to the total variation. The results show that the differences between the trees in a single population are the greatest factor of variability of leaves, followed by differences between populations and differences which are the result of variation in exposure to sunlight. Leaves in shade positions are typically larger than those in sunny positions, and they
have broader and shorter-pointed leaflets; in this feature they are very similar to the leaves of F. excelsior. Stepwise discriminant
analysis showed that the traits which refer to the leaflet number and length are the best differentiating traits between individual populations. The Submediterranean population Dragonja stands out with the smallest leaves and the population Lijak from
the same region is the most similar to Dragonja for most morphological traits. In general, phenotypic differences between the
Subpannonian and the Submediterranean populations of F. angustifolia are minor and indistinct. Based on the differences ascertained by the study, we can only confirm the presence of F. angustifolia subsp. oxycarpa (Bieb. ex Willd.) Franco et Rocha Alfonso in this part of its natural range.
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176. Improvement of truffle cultivation via novel quality control, soil analysis and inoculation methods : advanced inoculation methods, novel site selection tools and the establishmentof mycelial gene banks for economically important truffle specieswill improve truffle cultivation : Eureka: E! 3835-cultuber : final reportTine Grebenc, Marko Bajc, Melita Hrenko, Barbara Štupar, Igor Dakskobler, Gregor Božič, Nataša Milenković, Hojka Kraigher, Žaklina Marjanović, 2010, final research report Published in DiRROS: 12.07.2017; Views: 2933; Downloads: 764
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180. The production and turnover of extramatrical mycelium of ectomycorrhizal fungi in forest soils: role in carbon cyclingA. Ekblad, Hojka Kraigher, 2013, review article Abstract: There is growing evidence of the importance of extramatrical mycelium (EMM) of mycorrhizal fungi in carbon (C) cycling in ecosystems. However, our understanding has until recently been mainly based on laboratory experiments, and knowledge of such basic parameters as variations in mycelial production, standing biomass and turnover as well as the regulatory mechanisms behind such variations in forest soils is limited. Presently, the production of EMM by ectomycorrhizal (EM) fungi has been estimated at ~140 different forest sites to be up to several hundreds of kg per ha per year, but the published data are biased towards Picea abies in Scandinavia. Little is known about the standing biomass and turnover of EMM in other systems, and its
influence on the C stored or lost from soils. Here,
focussing on ectomycorrhizas, we discuss the factors
that regulate the production and turnover of EMM and
its role in soil C dynamics, identifying important gaps
in this knowledge. C availability seems to be the key
factor determining EMM production and possibly its
standing biomass in forests but direct effects of mineral nutrient availability on the EMM can be important. There is great uncertainty about the rate of turnover of EMM. There is increasing evidence that residues of EM fungi play a major role in the formation of stable N and C in SOM, which highlights the need to include mycorrhizal effects in models of global soil C stores.
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