Fungal colonization patterns and enzymatic activities of peatland ericaceous plants following long-term nutrient addition

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Kiheri , H , Velmala , S , Pennanen , T , Timonen , S , Sietiö , O-M , Fritze , H , Heinonsalo , J , van Dijk , N , Dise , N & Larmola , T 2020 , ' Fungal colonization patterns and enzymatic activities of peatland ericaceous plants following long-term nutrient addition ' , Soil Biology & Biochemistry , vol. 147 , 107833 . https://doi.org/10.1016/j.soilbio.2020.107833

Title: Fungal colonization patterns and enzymatic activities of peatland ericaceous plants following long-term nutrient addition
Author: Kiheri, Heikki; Velmala, Sannakajsa; Pennanen, Taina; Timonen, Sari; Sietiö, Outi-Maaria; Fritze, Hannu; Heinonsalo, Jussi; van Dijk, Netty; Dise, Nancy; Larmola, Tuula
Contributor organization: Department of Microbiology
Soils and climate change
Ecosystem processes (INAR Forest Sciences)
Institute for Atmospheric and Earth System Research (INAR)
Viikki Plant Science Centre (ViPS)
Jussi Heinonsalo / Principal Investigator
Forest Soil Science and Biogeochemistry
Date: 2020-08
Language: eng
Number of pages: 11
Belongs to series: Soil Biology & Biochemistry
ISSN: 0038-0717
DOI: https://doi.org/10.1016/j.soilbio.2020.107833
URI: http://hdl.handle.net/10138/317317
Abstract: Northern peatlands are often dominated by ericaceous shrub species which rely on ericoid mycorrhizal fungi (ERM) for access to organic sources of nutrients, such as nitrogen (N) and phosphorus (P), and host abundant dark septate endophytes (DSE). Relationships between hosts and fungal symbionts may change during deposition of anthropogenic N and P. We studied the long-term effects of N and P addition on two ericaceous shrubs, Calluna vulgaris and Erica tetralix, at Whim Bog, Scotland by analyzing fungal colonization of roots, enzymatic activity, and fungal species composition. Unexpectedly, the frequency of typical ERM intracellular colonization did not change while the occurrence of ERM hyphae tended to increase and DSE hyphae to decrease. Our findings indicate that altered nutrient limitations shift root associated fungal colonization patterns as well as affecting ericaceous root enzyme activity and thereby decomposition potential. Reduction of recalcitrant fungal biomass in melanized DSE may have implications for peatland C sequestration under nutrient addition.
Subject: 1181 Ecology, evolutionary biology
4112 Forestry
Ericoid mycorrhizae
Peatland
Nutrient limitation
Enzyme activity
Mycorrhizal colonization
Dark septate endophyte
Nitrogen deposition
PHOSPHORUS
LAND
MYCORRHIZAL FUNGI
Sphagnum
GROWTH
NITROGEN
ROOTS
DIVERSITY
VEGETATION
11832 Microbiology and virology
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: acceptedVersion


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