Complementary Roles of Wood-Inhabiting Fungi and Bacteria Facilitate Deadwood Decomposition

0542363 - MBÚ 2022 RIV GB eng J - Journal Article
Tláskal, Vojtěch - Brabcová, Vendula - Větrovský, Tomáš - Jomura, M. - López-Mondejár, Rubén - Monteiro, L. M. O. - Saraiva, J. P. - Human, Zander Rainier - Cajthaml, Tomáš - da Rocha, U. N. - Baldrian, Petr
Complementary Roles of Wood-Inhabiting Fungi and Bacteria Facilitate Deadwood Decomposition.
mSystems. Roč. 6, č. 1 (2021), č. článku e01078-20. ISSN 2379-5077. E-ISSN 2379-5077
R&D Projects: GA ČR(CZ) GA17-20110S; GA MŠMT(CZ) LTT17022
Research Infrastructure: e-INFRA CZ - 90140
Institutional support: RVO:61388971
Keywords : nitrogen-fixation * bacteria * deadwood * decomposition * forest ecosystems * fungi * metatranscriptomics * microbiome * nitrogen fixation * nutrient cycling
OECD category: Microbiology
Impact factor: 7.328, year: 2021
Method of publishing: Open access
https://msystems.asm.org/content/6/1/e01078-20.abstract

Forests accumulate and store large amounts of carbon (C), and a substantial fraction of this stock is contained in deadwood. This transient pool is subject to decomposition by deadwood-associated organisms, and in this process it contributes to CO2 emissions. Although fungi and bacteria are known to colonize deadwood, little is known about the microbial processes that mediate carbon and nitrogen (N) cycling in deadwood. In this study, using a combination of metagenomics, metatranscriptomics, and nutrient flux measurements, we demonstrate that the decomposition of deadwood reflects the complementary roles played by fungi and bacteria. Fungi were found to dominate the decomposition of deadwood and particularly its recalcitrant fractions, while several bacterial taxa participate in N accumulation in deadwood through N fixation, being dependent on fungal activity with respect to deadwood colonization and C supply. Conversely, bacterial N fixation helps to decrease the constraints of deadwood decomposition for fungi. Both the CO2 efflux and N accumulation that are a result of a joint action of deadwood bacteria and fungi may be significant for nutrient cycling at ecosystem levels. Especially in boreal forests with low N stocks, deadwood retention may help to improve the nutritional status and fertility of soils.
Permanent Link: http://hdl.handle.net/11104/0319790