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

Kiheri, Heikki; Velmala, Sannakajsa; Pennanen, Taina; Timonen, Sari; Sietiö, Outi-Maaria; Fritze, Hannu; Heinonsalo, Jussi; van Dijk, Netty; Dise, Nancy; Larmola, Tuula. 2020 Fungal colonization patterns and enzymatic activities of peatland ericaceous plants following long-term nutrient addition. Soil Biology and Biochemistry, 147, 107833. 11, pp. https://doi.org/10.1016/j.soilbio.2020.107833

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Official URL: http://dx.doi.org/10.1016/j.soilbio.2020.107833

Abstract/Summary

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 affect 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.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1016/j.soilbio.2020.107833
UKCEH and CEH Sections/Science Areas:	Atmospheric Chemistry and Effects (Science Area 2017-) UKCEH Fellows
ISSN:	0038-0717
Additional Information. Not used in RCUK Gateway to Research.:	Open Access paper - full text available via Official URL link.
Additional Keywords:	ericoid mycorrhizae, peatland, nutrient limitation, enzyme activity, mycorrhizal colonization, dark septate endophyte, nitrogen deposition, sphagnum
NORA Subject Terms:	Ecology and Environment
Date made live:	03 Jun 2020 16:48 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/527867

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1016/j.soilbio.2020.107833

UKCEH and CEH Sections/Science Areas:

Atmospheric Chemistry and Effects (Science Area 2017-)
UKCEH Fellows

ISSN:

0038-0717

Additional Information. Not used in RCUK Gateway to Research.:

Open Access paper - full text available via Official URL link.

Additional Keywords:

ericoid mycorrhizae, peatland, nutrient limitation, enzyme activity, mycorrhizal colonization, dark septate endophyte, nitrogen deposition, sphagnum