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Query: "author" (Tanja Mrak) .

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Towards fine root identification key of common tree species
Tanja Mrak, Peter Železnik, Jožica Gričar, Hojka Kraigher, 2014

DiRROS - Published: 12.07.2017; Views: 1241; Downloads: 490
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Influence of soil temperature on growth traits of European beech seedlings
Ines Štraus, Tanja Mrak, Mitja Ferlan, Peter Železnik, Hojka Kraigher, 2015

DiRROS - Published: 12.07.2017; Views: 1941; Downloads: 550
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Scleroderma areolatum ectomycorrhiza on Fagus sylvatica L.
Tanja Mrak, Katja Kühdorf, Tine Grebenc, Ines Štraus, Bebette Münzenberger, Hojka Kraigher, 2017

Abstract: Despite its broad host range and distribution and its potential applications in commercial plantation forests, comprehensive descriptions of Scleroderma ectomycorrhizae are available only for Scleroderma citrinum, Scleroderma bovista and Scleroderma sinnamariense. This study provides a morphological and anatomical description of tree nursery derived ectomycorrhizae of Scleroderma areolatum on Fagus sylvatica, grown for several years in a climatized room. Ectomycorrhizae of S. areolatum were silvery white with abundant rhizomorphs; all mantle layers were plectenchymatous, rhizomorphs of type E, with prominent emanating hyphae with thick cell wall. The distal ends of emanating hyphae of rhizomorphs were inflated and often merged with other emanating hyphae. All parts of the mycorrhiza were clampless. In hyphae of the outer mantle layer, rhizomorphs and emanating hyphae, oily droplets were observed that did not stain in sulfo-vanillin and disappeared in lactic acid after a few hours. Although the phylogenetic analysis positioned the newly described ectomycorrhiza together with Scleroderma verrucosum and Scleroderma cepa in a single clade with a taxon name SH005470.07FU, the ectomycorrhizae of these three species can be morphologically well separated based on rhizomorph type.
DiRROS - Published: 12.07.2017; Views: 1291; Downloads: 345
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Vpliv suše na drobne korenine dreves in ektomikorizo v gozdnih ekosistemih
Tanja Mrak, Hojka Kraigher, 2019

Abstract: Sušni stres sproži tako pri drobnih koreninah dreves kot pri ektomikoriznih glivah številne spremembe na različnih nivojih. Drevesa se branijo pred sušo z mehanizmi izogibanja in tolerance. Suša lahko vpliva na kolonizacijo z ektomikoriznimi glivami in na strukturo ektomikorizne združbe. Pomembno vlogo pri preživetju mladja ob suši imajo skupne micelijske mreže. Ob zmerni suši je kolonizacija z ektomikoriznimi glivami večja kot ob ekstremni suši, kar ima za drevo številne pozitivne učinke. V sušnih razmerah se pogosto še posebej poveča pogostnost ektomikorizne vrste Cenococcum geophilum Fr., ki omogoča, da drobne korenine ostanejo funkcionalne in takoj po končanem sušnem obdobju pričnejo z absorpcijo vode. V sušnih razmerah se poveča tvorba težko razgradljivih molekul v koreninah (lignin), prav tako pa se težko razgradljive molekule (melanin) tvorijo tudi pri ektomikorizni vrsti C. geophilum, kar prispeva h kopičenju težko razgradljivih organskih snovi v tleh.
Keywords: globalne spremembe, drobne korenine, mikorizne glive, prilagoditve, organska snov v tleh
DiRROS - Published: 29.11.2019; Views: 1033; Downloads: 497
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