0532524 - ÚVGZ 2021 RIV GB eng J - Journal Article
Otgonsuren, B. - Rosinger, C. - Wang, L. - Godbold, Douglas
Winter soils of Mongolian forests have viable ectomycorrhizas and soil enzymatic activity.
Soil Biology and Biochemistry. Roč. 148, SEP (2020), č. článku 107914. ISSN 0038-0717. E-ISSN 1879-3428
R&D Projects: GA MŠMT(CZ) LO1415
Research Infrastructure: CzeCOS III - 90123
Institutional support: RVO:86652079
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
OECD category: Soil science
Impact factor: 7.609, year: 2020 ; AIS: 1.697, rok: 2020
Method of publishing: Open access
Result website:
https://www.sciencedirect.com/science/article/pii/S003807172030211X?via%3DihubDOI: https://doi.org/10.1016/j.soilbio.2020.107914

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.
Permanent Link: http://hdl.handle.net/11104/0310991