Elevated atmospheric CO2 increases fine root production, respiration, rhizosphere respiration and soil CO2 efflux in Scots pine seedlings
Elevated atmospheric CO2 increases fine root production, respiration, rhizosphere respiration and soil CO2 efflux in Scots pine seedlings
In this study, we investigated the impact of elevated atmospheric CO2 (ambient + 350 µmol mol–1) on fine root production and respiration in Scots pine (Pinus sylvestris L.) seedlings. After six months exposure to elevated CO2, root production measured by root in-growth bags, showed significant increases in mean total root length and biomass, which were more than 100% greater compared to the ambient treatment. This increased root length may have lead to a more intensive soil exploration. Chemical analysis of the roots showed that the roots in the elevated treatment accumulated more starch and had a lower C/N-ratio. Specific root respiration rates were significantly higher in the elevated treatment and this was probably attributed to increased nitrogen concentrations in the roots. Rhizospheric respiration and soil CO2 efflux were also enhanced in the elevated treatment. These results clearly indicate that under elevated atmospheric CO2 root production and development in Scots pine seedlings is altered and respiratory carbon losses through the root system are increased.
871-878
Janssens, Ivan. A.
2956c535-8dac-4c6f-88d3-297c8d87f0ee
Crookshanks, Meg
2cc48ea3-df8c-40c7-b894-d3d54201f7de
Ceulemans, Reinhart
2a21441a-1912-4985-b19a-a67b9640347a
1998
Janssens, Ivan. A.
2956c535-8dac-4c6f-88d3-297c8d87f0ee
Crookshanks, Meg
2cc48ea3-df8c-40c7-b894-d3d54201f7de
Ceulemans, Reinhart
2a21441a-1912-4985-b19a-a67b9640347a
Janssens, Ivan. A., Crookshanks, Meg, Taylor, Gail and Ceulemans, Reinhart
(1998)
Elevated atmospheric CO2 increases fine root production, respiration, rhizosphere respiration and soil CO2 efflux in Scots pine seedlings.
Global Change Biology, 4 (8), .
(doi:10.1046/j.1365-2486.1998.00199.x).
Abstract
In this study, we investigated the impact of elevated atmospheric CO2 (ambient + 350 µmol mol–1) on fine root production and respiration in Scots pine (Pinus sylvestris L.) seedlings. After six months exposure to elevated CO2, root production measured by root in-growth bags, showed significant increases in mean total root length and biomass, which were more than 100% greater compared to the ambient treatment. This increased root length may have lead to a more intensive soil exploration. Chemical analysis of the roots showed that the roots in the elevated treatment accumulated more starch and had a lower C/N-ratio. Specific root respiration rates were significantly higher in the elevated treatment and this was probably attributed to increased nitrogen concentrations in the roots. Rhizospheric respiration and soil CO2 efflux were also enhanced in the elevated treatment. These results clearly indicate that under elevated atmospheric CO2 root production and development in Scots pine seedlings is altered and respiratory carbon losses through the root system are increased.
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Published date: 1998
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Local EPrints ID: 159937
URI: http://eprints.soton.ac.uk/id/eprint/159937
ISSN: 1354-1013
PURE UUID: 7daf7a6b-6c3f-4ae0-86c9-307eec630ec7
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Date deposited: 08 Jul 2010 11:46
Last modified: 14 Mar 2024 01:55
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Author:
Ivan. A. Janssens
Author:
Meg Crookshanks
Author:
Gail Taylor
Author:
Reinhart Ceulemans
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