71. Identification of types of ectomycorrhizae on seedlings in a beech provenance trialMarjana Westergren, Tine Grebenc, Gregor Božič, Robert Brus, Hojka Kraigher, 2004, izvirni znanstveni članek Povzetek: Root systems and types of ectomycorrhizae (ECM) were analysed on three 7-year-old beech seedlings (Fagus sylvatica L.) of three provenances (Val di Sella, Idrija, Nizbor) from an international beech provenance trial and on a naturally regenerated 5-year-old beech seedling from the same site (Kamenski vrh by Novo mesto). All short roots were mycorrhizal. In the sampled 20,302 root tips 49 % were non-turgescent and unidentifiable ECM. Twenty-two different types of ECM were identified, out of which 11 were successfully determined either to the species or genus level. All ECM were described by morphological and anatomical characteristics, basidiomycetes also by molecularmethods. ECM that was not successfully determined either to the species or genus level formed a new cluster in the Slovenian mycorrhizal molecular database. Species richness and percentage of vital ECM roots were highest for the provenance from Idrija (Slovenia). The results indicate that there might be differences between provenances regarding the abundance of ECM,which should be further studied. Ključne besede: beech, provenance trial, ectomycorrhizae, types of ectomycorrhizae Objavljeno v DiRROS: 12.07.2017; Ogledov: 4410; Prenosov: 1915 Celotno besedilo (2,48 MB) |
72. Predstavitev strokovnih osnov za pripravo dopolnitev in sprememb Pravilnika o določitvi provenienčnih območij : (Ur. l. RS 72/2003, 58/2012) : ekspertizaMarjana Westergren, Hojka Kraigher, 2017, elaborat, predštudija, študija Ključne besede: strukture drevesnih vrst, provenienčna območja, ekološke značilnosti, genetika, tujerodne drevesne vrste Objavljeno v DiRROS: 12.07.2017; Ogledov: 2880; Prenosov: 604 Celotno besedilo (825,17 KB) |
73. Ukrepi za zagotavljanje genskega varstva gozdov, identificiranih v okviru ciljnega raziskovalnega projekta V4-1140 : elaboratMarjana Westergren, Gregor Božič, Andrej Verlič, Hojka Kraigher, 2014, elaborat, predštudija, študija Ključne besede: gozdni genski viri, drevesa, varovanje, gozdovi, tehnične smernice, ohranitev Objavljeno v DiRROS: 12.07.2017; Ogledov: 2838; Prenosov: 718 Celotno besedilo (4,83 MB) |
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77. Morphological variability of Fraxinus angustifolia Vahl in the north-western BalkansKristjan Jarni, Marjana Westergren, Hojka Kraigher, Robert Brus, 2011, izvirni znanstveni članek Povzetek: 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. Objavljeno v DiRROS: 12.07.2017; Ogledov: 2894; Prenosov: 1326 Celotno besedilo (772,86 KB) Gradivo ima več datotek! Več... |
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