Arbuscular mycorrhizal fungi reduce nitrous oxide emissions from N2 O hotspots

© 2017 The Authors. New Phytologist © 2017 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 220(2018), 4 vom: 13. Dez., Seite 1285-1295
1. Verfasser: Storer, Kate (VerfasserIn)
Weitere Verfasser: Coggan, Aisha, Ineson, Phil, Hodge, Angela
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2018
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't N cycle agriculture arbuscular mycorrhizal fungi (AMF) greenhouse gas hyphosphere nitrification nitrogen (N) nitrous oxide (N2O) mehr... Carbon 7440-44-0 Nitrous Oxide K50XQU1029 Nitrogen N762921K75
Beschreibung
Zusammenfassung:© 2017 The Authors. New Phytologist © 2017 New Phytologist Trust.
Nitrous oxide (N2 O) is a potent, globally important, greenhouse gas, predominantly released from agricultural soils during nitrogen (N) cycling. Arbuscular mycorrhizal fungi (AMF) form a mutualistic symbiosis with two-thirds of land plants, providing phosphorus and/or N in exchange for carbon. As AMF acquire N, it was hypothesized that AMF hyphae may reduce N2 O production. AMF hyphae were either allowed (AMF) or prevented (nonAMF) access to a compartment containing an organic matter and soil patch in two independent microcosm experiments. Compartment and patch N2 O production was measured both before and after addition of ammonium and nitrate. In both experiments, N2 O production decreased when AMF hyphae were present before inorganic N addition. In the presence of AMF hyphae, N2 O production remained low following ammonium application, but increased in the nonAMF controls. By contrast, negligible N2 O was produced following nitrate application to either AMF treatment. Thus, the main N2 O source in this system appeared to be via nitrification, and the production of N2 O was reduced in the presence of AMF hyphae. It is hypothesized that AMF hyphae may be outcompeting slow-growing nitrifiers for ammonium. This has significant global implications for our understanding of soil N cycling pathways and N2 O production
Beschreibung:Date Completed 25.09.2019
Date Revised 04.10.2023
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.14931