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dc.contributor.author
Barthel, Matti
dc.contributor.author
Cieraad, Ellen
dc.contributor.author
Zakharova, Elena A.
dc.contributor.author
Hunt, J.E.
dc.date.accessioned
2018-12-21T17:04:18Z
dc.date.available
2017-06-11T03:30:26Z
dc.date.available
2018-12-21T17:04:18Z
dc.date.issued
2013
dc.identifier.issn
1810-6277
dc.identifier.issn
1810-6285
dc.identifier.other
10.5194/bgd-10-17939-2013
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/78667
dc.identifier.doi
10.3929/ethz-b-000078667
dc.description.abstract
Since substrates for respiration are supplied mainly by recent photo-assimilates, there is a strong but time-lagged link between short-term above- and belowground carbon (C) cycling. However, regulation of this coupling by environmental variables is poorly understood. Whereas recent studies focussed on the effect of drought and shading on the link between above- and belowground short-term C cycling, the effect of temperature remains unclear. We used a 13CO2 pulse-chase labelling experiment to investigate the effect of a sudden temperature change from 25 to 10◦C on the short-term coupling between assimilatory C uptake and respiratory loss. The study was done in the laboratory using two-month-old perennial rye-grass plants (Lolium perenne L.). After label application, the δ13 C signal of respired shoot and root samples was analysed at regular time intervals using laser spectroscopy. In addition, δ13C was analysed in bulk root and shoot samples. Cold temperature (10◦C) reduced the short-term coupling between shoot and roots by delaying belowground transfer of recent assimilates and its subsequent respiratory use, as indicated by the δ13 C signal of root respiration (δ13C RR). That is, the time lag from the actual shoot labelling to the first appearance of the label in 13CRR was about 1.5 times longer under cold temperature. Moreover, analysis of bulk shoot and root material revealed that plants at cold temperature invest relatively more carbon into respiration compared to growth or storage. While the whole plant C turnover increased under cold temperature, the turnover time of the labile C pool decreased, probably because less 13C is used for growth and/or storage. That is, (almost) all recent C remained in the labile pool serving respiration under these conditions. Overall, our results highlight the importance of temperature as a driver of C transport and relative C allocation within the plant–soil system.
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Sudden cold temperature regulates the time-lag between plant CO2 uptake and release
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2013-11-18
ethz.journal.title
Biogeosciences Discussions
ethz.journal.volume
10
en_US
ethz.journal.issue
11
en_US
ethz.journal.abbreviated
Biogeosci. discuss.
ethz.pages.start
17939
en_US
ethz.pages.end
17964
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.publication.place
Göttingen
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03648 - Buchmann, Nina / Buchmann, Nina
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03648 - Buchmann, Nina / Buchmann, Nina
ethz.date.deposited
2017-06-11T03:33:35Z
ethz.source
ECIT
ethz.identifier.importid
imp59365180462e434477
ethz.ecitpid
pub:123716
ethz.eth
no
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-19T09:48:18Z
ethz.rosetta.lastUpdated
2018-12-21T17:04:23Z
ethz.rosetta.exportRequired
false
ethz.rosetta.versionExported
true
ethz.COinS
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