Johnson, D., Leake, J.R., Ostle, N. et al. (2 more authors) (2002) In situ 13CO2 pulse-labelling of upland grassland demonstrates a rapid pathway of carbon flux from arbuscular mycorrhizal mycelia to the soil. New Phytologist, 153 (2). pp. 327-334. ISSN 0028-646X
Abstract
• The flux of pulse-derived 13C from upland pasture plants to the external mycelium of their arbuscular mycorrhizal (AM) symbionts was traced and quantified over a 7-d post-labelling period.
• Mesh cores, which allowed in-growth of native AM mycelium but were impenetrable to roots, were inserted into unlimed and limed plots and the surrounding vegetation was exposed to 13CO2 at ambient CO2 concentrations.
• Release of 13CO2 from cores colonized by AM mycelium peaked 9–14 h after labelling and declined within 24 h after severance of mycelial connections to roots. Between 5 and 8% of carbon lost by plants was respired by AM mycelium over the first 21 h after labelling. Liming increased the amount of carbon fixed by plants and subsequently allocated to fine roots and AM mycelium.
• The results demonstrate for the first time under field conditions that AM mycelia provide a rapid and important pathway of carbon flux from plants to the soil and atmosphere.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Open access copy available from the journal web site. |
Keywords: | C-13, stable isotope, liming, carbon flow, carbon cycling, respiration, arbuscular mycorrhiza, mesh cores |
Dates: |
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Institution: | The University of York, The University of Sheffield |
Academic Units: | The University of York > Faculty of Sciences (York) > Biology (York) The University of Sheffield > Faculty of Science (Sheffield) > School of Biosciences (Sheffield) > Department of Animal and Plant Sciences (Sheffield) |
Depositing User: | Open Access From Journal |
Date Deposited: | 22 Dec 2008 15:31 |
Last Modified: | 22 Dec 2008 15:31 |
Published Version: | http://dx.doi.org/10.1046/j.0028-646X.2001.00316.x |
Status: | Published |
Publisher: | Wiley-Blackwell |
Refereed: | Yes |
Identification Number: | 10.1046/j.0028-646X.2001.00316.x |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:5104 |