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Winter soils of Mongolian forests have viable ectomycorrhizas and soil enzymatic activity
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SYSNO ASEP 0532524 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Winter soils of Mongolian forests have viable ectomycorrhizas and soil enzymatic activity Author(s) Otgonsuren, B. (MN)
Rosinger, C. (AT)
Wang, L. (CN)
Godbold, Douglas (UEK-B) ORCID, SAI, RIDNumber of authors 4 Article number 107914 Source Title Soil Biology and Biochemistry. - : Elsevier - ISSN 0038-0717
Roč. 148, SEP (2020)Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords microbial community ; seasonal-variation ; cold-acclimation ; low-temperature ; norway spruce ; tolerance ; fungi ; pine ; gradient ; tundra ; Ectomycorrhizas ; Enzyme activity ; Soil freezing ; Pinus sibirica ; Pinus sylvestris Subject RIV DF - Soil Science OECD category Soil science R&D Projects LO1415 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CzeCOS III - 90123 - Ústav výzkumu globální změny AV ČR, v. v. i. Method of publishing Open access Institutional support UEK-B - RVO:86652079 UT WOS 000566668900045 EID SCOPUS 85088976102 DOI https://doi.org/10.1016/j.soilbio.2020.107914 Annotation 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. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2021 Electronic address https://www.sciencedirect.com/science/article/pii/S003807172030211X?via%3Dihub
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