Universität zu Köln

Otgonsuren, Burenjargal ORCID: 0000-0001-7732-7173, Rosinger, Christoph, Wang, Lixia and Godbold, Douglas L. (2020). Winter soils of Mongolian forests have viable ectomycorrhizas and soil enzymatic activity. Soil Biol. Biochem., 148. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 0038-0717

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Abstract

In forests in Mongolia, tree roots and ectomycorrhizal fungi must survive several months of soil freezing in winter. To investigate the ectomycorrhizal community after winter, we collected fine roots of Scots pine (Pinus sylvestris) and Siberian pine (Pinus sibirica) and associated soil from Nukht forest in the Bogd-Khan National Reserve, Mongolia. Soil samples were collected from frozen soil at the end of April 2016. We described the ectomycorrhizal community, and determined on ectomycorrhizal roots tips and in soils the potential activity of enzymes involved in the degradation of soil organic matter. In order to assess the temperature sensitivity of enzyme activity, potential soil enzyme activities were assayed at temperatures from 5 to 20 degrees C. We detected 24 different ectomycorrhizal morphotypes associated with Pinus sylvestris and Pinus sibirica, and 18 morphotypes were identified to taxa. The two Pinus species had dissimilar ectomycorrhizal communities, and only 2 ectomycorrhizal fungal taxa were common to both species. Most ectomycorrhizal taxa had measurable activity of at least one extracellular enzyme. A high contribution to the community extracellular enzyme activity was shown for both abundant and less abundant taxa. Among the eight tested soil enzymes, only the activity of leucine amino peptidase showed consistent higher Q(10) values at 5-15 degrees C than at 10-20 degrees C, suggesting that the enzyme is adapted to colder temperatures. Total soil N was the strongest factor explaining differences in soil enzyme potential activity. A positive relationship was found between soil N and the soil potential enzyme activity of acid phosphatase. We suggest that viable ectomycorrhizas during winter provide an advantage to Pinus sibirica and Pinus sylvestris in acquiring nutrients as soil thaws in spring.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Otgonsuren, Burenjargal UNSPECIFIED orcid.org/0000-0001-7732-7173 UNSPECIFIED Rosinger, Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, Lixia UNSPECIFIED UNSPECIFIED UNSPECIFIED Godbold, Douglas L. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-321762
DOI:	10.1016/j.soilbio.2020.107914
Journal or Publication Title:	Soil Biol. Biochem.
Volume:	148
Date:	2020
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	0038-0717
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MICROBIAL COMMUNITY; SEASONAL-VARIATION; COLD-ACCLIMATION; LOW-TEMPERATURE; NORWAY SPRUCE; TOLERANCE; FUNGI; PINE; GRADIENT; TUNDRA Multiple languages Soil Science Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/32176