Exposure to nitrogen does not eliminate N-2 fixation in the feather moss Pleurozium schreberi (Brid.) Mitt.
(2014) In Plant and Soil 374(1-2). p.513-521- Abstract
- The feather moss Pleurozium schreberi (Brid.) Mitt. is colonized by cyanobacteria, which fix substantial amounts of atmospheric nitrogen (N) in pristine and N-poor ecosystems. Cyanobacterial N-2 fixation is inhibited by N deposition. However, the threshold of N input that leads to the inhibition of N-2 fixation has not been adequately investigated. Further, the ability of N-2 fixation to recover in mosses from high N deposition areas has not been studied to date. We conducted two laboratory studies in which we (1) applied a range of concentrations of N as NH4NO3 to mosses from low N-deposition areas, and (2) we deprived mosses from a high N-deposition area of N to test their ability to recover N-2 fixation. Higher addition rates (up to 10... (More)
- The feather moss Pleurozium schreberi (Brid.) Mitt. is colonized by cyanobacteria, which fix substantial amounts of atmospheric nitrogen (N) in pristine and N-poor ecosystems. Cyanobacterial N-2 fixation is inhibited by N deposition. However, the threshold of N input that leads to the inhibition of N-2 fixation has not been adequately investigated. Further, the ability of N-2 fixation to recover in mosses from high N deposition areas has not been studied to date. We conducted two laboratory studies in which we (1) applied a range of concentrations of N as NH4NO3 to mosses from low N-deposition areas, and (2) we deprived mosses from a high N-deposition area of N to test their ability to recover N-2 fixation. Higher addition rates (up to 10 kg N ha(-1)) did not systematically inhibit N-2 fixation in P. schreberi. Conversely, upon weeks of N deprivation of mosses from a high N environment, N-2 fixation rates increased. The threshold of total N deposition above which N-2 fixation in P. schreberi is inhibited is likely to be > 10 kg N ha(-1). Further, cyanobacteria are able to recover from high N inputs and are able to fix atmospheric N-2 after a period of N deprivation. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4255907
- author
- Rousk, Kathrin LU ; Jones, Davey L. and DeLuca, Thomas H.
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Boreal forests, Bryophytes, Cyanobacteria, Nitrogenase activity, N, deposition, Symbiosis
- in
- Plant and Soil
- volume
- 374
- issue
- 1-2
- pages
- 513 - 521
- publisher
- Springer
- external identifiers
-
- wos:000328849200039
- scopus:84890861355
- ISSN
- 0032-079X
- DOI
- 10.1007/s11104-013-1908-5
- language
- English
- LU publication?
- yes
- id
- de3acfee-bd95-443a-bdcb-8bd9438665c1 (old id 4255907)
- date added to LUP
- 2016-04-01 14:45:14
- date last changed
- 2020-10-07 03:57:44
@article{de3acfee-bd95-443a-bdcb-8bd9438665c1,
abstract = {The feather moss Pleurozium schreberi (Brid.) Mitt. is colonized by cyanobacteria, which fix substantial amounts of atmospheric nitrogen (N) in pristine and N-poor ecosystems. Cyanobacterial N-2 fixation is inhibited by N deposition. However, the threshold of N input that leads to the inhibition of N-2 fixation has not been adequately investigated. Further, the ability of N-2 fixation to recover in mosses from high N deposition areas has not been studied to date. We conducted two laboratory studies in which we (1) applied a range of concentrations of N as NH4NO3 to mosses from low N-deposition areas, and (2) we deprived mosses from a high N-deposition area of N to test their ability to recover N-2 fixation. Higher addition rates (up to 10 kg N ha(-1)) did not systematically inhibit N-2 fixation in P. schreberi. Conversely, upon weeks of N deprivation of mosses from a high N environment, N-2 fixation rates increased. The threshold of total N deposition above which N-2 fixation in P. schreberi is inhibited is likely to be > 10 kg N ha(-1). Further, cyanobacteria are able to recover from high N inputs and are able to fix atmospheric N-2 after a period of N deprivation.},
author = {Rousk, Kathrin and Jones, Davey L. and DeLuca, Thomas H.},
issn = {0032-079X},
language = {eng},
number = {1-2},
pages = {513--521},
publisher = {Springer},
series = {Plant and Soil},
title = {Exposure to nitrogen does not eliminate N-2 fixation in the feather moss Pleurozium schreberi (Brid.) Mitt.},
url = {http://dx.doi.org/10.1007/s11104-013-1908-5},
doi = {10.1007/s11104-013-1908-5},
volume = {374},
year = {2014},
}