The soil organic matter decomposition mechanisms in ectomycorrhizal fungi are tuned for liberating soil organic nitrogen
Nicolás, César LU ; Martin-Bertelsen, Tomas LU ; Floudas, Dimitrios LU ; Bentzer, Johan LU ; Smits, Mark LU ; Johansson, Tomas LU ; Troein, Carl LU
; Persson, Per
LU
and Tunlid, Anders
LU
(2018)
In ISME Journal
- Abstract
Many trees form ectomycorrhizal symbiosis with fungi. During symbiosis, the tree roots supply sugar to the fungi in exchange for nitrogen, and this process is critical for the nitrogen and carbon cycles in forest ecosystems. However, the extents to which ectomycorrhizal fungi can liberate nitrogen and modify the soil organic matter and the mechanisms by which they do so remain unclear since they have lost many enzymes for litter decomposition that were present in their free-living, saprotrophic ancestors. Using time-series spectroscopy and transcriptomics, we examined the ability of two ectomycorrhizal fungi from two independently evolved ectomycorrhizal lineages to mobilize soil organic nitrogen. Both species oxidized the organic... (More)
Many trees form ectomycorrhizal symbiosis with fungi. During symbiosis, the tree roots supply sugar to the fungi in exchange for nitrogen, and this process is critical for the nitrogen and carbon cycles in forest ecosystems. However, the extents to which ectomycorrhizal fungi can liberate nitrogen and modify the soil organic matter and the mechanisms by which they do so remain unclear since they have lost many enzymes for litter decomposition that were present in their free-living, saprotrophic ancestors. Using time-series spectroscopy and transcriptomics, we examined the ability of two ectomycorrhizal fungi from two independently evolved ectomycorrhizal lineages to mobilize soil organic nitrogen. Both species oxidized the organic matter and accessed the organic nitrogen. The expression of those events was controlled by the availability of glucose and inorganic nitrogen. Despite those similarities, the decomposition mechanisms, including the type of genes involved as well as the patterns of their expression, differed markedly between the two species. Our results suggest that in agreement with their diverse evolutionary origins, ectomycorrhizal fungi use different decomposition mechanisms to access organic nitrogen entrapped in soil organic matter. The timing and magnitude of the expression of the decomposition activity can be controlled by the below-ground nitrogen quality and the above-ground carbon supply.
(Less)
- author
- Nicolás, César
LU
; Martin-Bertelsen, Tomas
LU
; Floudas, Dimitrios
LU
; Bentzer, Johan
LU
; Smits, Mark
LU
; Johansson, Tomas
LU
; Troein, Carl
LU
; Persson, Per
LU
and Tunlid, Anders
LU
- organization
- publishing date
- 2018-12-11
- type
- Contribution to journal
- publication status
- published
- subject
- in
- ISME Journal
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:85058371616
- pmid:30538275
- ISSN
- 1751-7362
- DOI
- 10.1038/s41396-018-0331-6
- project
- MICCS - Molecular Interactions Controlling soil Carbon Sequestration
- language
- English
- LU publication?
- yes
- id
- 5e900e4f-9c82-4fd5-b856-b76269f1b64f
- date added to LUP
- 2019-01-08 14:15:17
- date last changed
- 2024-04-15 19:34:13
@article{5e900e4f-9c82-4fd5-b856-b76269f1b64f,
abstract = {{<p>Many trees form ectomycorrhizal symbiosis with fungi. During symbiosis, the tree roots supply sugar to the fungi in exchange for nitrogen, and this process is critical for the nitrogen and carbon cycles in forest ecosystems. However, the extents to which ectomycorrhizal fungi can liberate nitrogen and modify the soil organic matter and the mechanisms by which they do so remain unclear since they have lost many enzymes for litter decomposition that were present in their free-living, saprotrophic ancestors. Using time-series spectroscopy and transcriptomics, we examined the ability of two ectomycorrhizal fungi from two independently evolved ectomycorrhizal lineages to mobilize soil organic nitrogen. Both species oxidized the organic matter and accessed the organic nitrogen. The expression of those events was controlled by the availability of glucose and inorganic nitrogen. Despite those similarities, the decomposition mechanisms, including the type of genes involved as well as the patterns of their expression, differed markedly between the two species. Our results suggest that in agreement with their diverse evolutionary origins, ectomycorrhizal fungi use different decomposition mechanisms to access organic nitrogen entrapped in soil organic matter. The timing and magnitude of the expression of the decomposition activity can be controlled by the below-ground nitrogen quality and the above-ground carbon supply.</p>}},
author = {{Nicolás, César and Martin-Bertelsen, Tomas and Floudas, Dimitrios and Bentzer, Johan and Smits, Mark and Johansson, Tomas and Troein, Carl and Persson, Per and Tunlid, Anders}},
issn = {{1751-7362}},
language = {{eng}},
month = {{12}},
publisher = {{Nature Publishing Group}},
series = {{ISME Journal}},
title = {{The soil organic matter decomposition mechanisms in ectomycorrhizal fungi are tuned for liberating soil organic nitrogen}},
url = {{http://dx.doi.org/10.1038/s41396-018-0331-6}},
doi = {{10.1038/s41396-018-0331-6}},
year = {{2018}},
}