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Graf-Wimark, Daniel Robert Heinrich, 2010. Substrate utilization, ammonium mineralization and phylogenetic relationships of the fungi Leptodontidium sp. found in boreal forest soil. Second cycle, A2E. Uppsala: SLU, Dept. of Forest Mycology and Plant Pathology



Many studies on global elements fluxes neglect biological aspects or simply refer to them unspecifiedly as biological activity. The advent of molecular tools to investigate these ac-tivities has although given rise to a further understanding of the matter. In this study an attempt to determine the ecology and function of 11 strains of the fungal genus Leptodon-tidium (L.) in boreal forest soils is made. In an earlier study (Lindahl et al. 2010) strains with affinity to L. increased in abundance after the disruption of root carbon transport from host trees to ectomycorrhizal Fungi. At the same time ectomycorrhizal species de-creased in abundance which provoked the hypothesis that the senescent ectomycorrhiza is decomposed by L. and other opportunistic Fungi. To test this hypothesis L. strains were grown on different agar based substrates while substrate utilization was assessed by measuring respiration. Since other studies observed increased soil ammonium levels in disturbed forests (e.g. clear cut areas) another experiment was set up to measure ammo-nium mineralization of L. when decomposing fungal substrate. Finally a phylogeny of the strains based on the rDNA internal spacer and large subunit region was made in order to get more information on taxonomic relationships as well as ecological and functional in-formation.

Main title:Substrate utilization, ammonium mineralization and phylogenetic relationships of the fungi Leptodontidium sp. found in boreal forest soil
Authors:Graf-Wimark, Daniel Robert Heinrich
Supervisor:Bödeker, Inga and Lindahl, Björn
Examiner:Fransson, Petra Maud Asta
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2010
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:NM010 Soil and Water Management - Master's Programme 120 HEC
Supervising department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
Keywords:Leptodontidium sp., soil fungi, ammonium mineralization, phylogeny, boreal forest
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Subject. Use of subject categories until 2023-04-30.:Soil biology
Deposited On:01 Feb 2011 14:22
Metadata Last Modified:20 Apr 2012 14:17

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