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Title:Vpliv suše na drobne korenine dreves in ektomikorizo v gozdnih ekosistemih
Authors:Mrak, Tanja (Author)
Kraigher, Hojka (Author)
Language:Slovenian
Tipology:1.01 - Original Scientific Article
Organisation:LogoSciVie - Slovenian Forestry Institute
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
Year of publishing:2019
COBISS_ID:5568166 Link is opened in a new window
UDC:630*16:630*18(045)=163=111
ISSN on article:2335-3112
OceCobissID:266761216 Link is opened in a new window
DOI:10.20315/ASetL.120.1 Link is opened in a new window
Note:Vzpor. besedilo v slov. in angl.;
Views:210
Downloads:70
Files:URL URL - Presentation file, visit https://doi.org/10.20315/ASetL.120.1
.pdf PDF - Presentation file, download (2,04 MB)
 
Journal:Acta silvae et ligni
Gozdarski inštitut Slovenije, založba Silvae Slovenica
 
Funder:EC - Evropska skupnost (EC)
Funding programme:FP7 - 7-th Framework Programme for Research and Technological Development
Project no.:315982
Project name:European Forest Research and Innovation
Project acronym:EUFORINNO
Project ID:info:eu-repo/grantAgreement/EC/FP7/315982
 
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Secondary language

Language:English
Title:Effects of drought on tree fine roots and ectomycorrhiza in forest ecosystems
Abstract:Drought stress elicits many changes in tree fine roots and ectomycorrhizal fungi. Trees cope with drought through avoidance mechanisms or tolerance. Drought can result in changes in colonization by ectomycorrhizal fungi and in the structure of ectomycorrhizal communities. Survival of tree seedlings is supported through common mycelium networks. In moderate drought, there is greater colonization by ectomycorrhizal fungi compared to severe drought, resulting in several beneficial effects to the tree. Under drought, the frequency of ectomycorrhizal fungus Cenococcum geophilum Fr. often increases. C. geophilum sustains tree fine roots function and therefore roots are able to absorb water as soon as the drought period is over. Under drought, synthesis of recalcitrant organic compounds in roots, e.g. lignine, is increased. Recalcitrant compounds such as melanine are also found in C. geophilum, contributing to the accumulation of recalcitrant soil organic matter.
Keywords:global changes, fine roots, mycorrhizal fungi, adaptation, soil organic matter


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