Show simple item record

dc.contributor.authorDrake, John E.
dc.contributor.authorStoy, Paul C.
dc.contributor.authorJackson, Robert B.
dc.contributor.authorDeLucia, Evan H.
dc.identifier.citationDrake, John E., Paul C. Stoy, Robert B. Jackson, and Evan H. DeLucia. “Fine-Root Respiration in a Loblolly Pine (Pinus taeda L.) Forest Exposed to Elevated CO2 and N Fertilization.” Plant, Cell & Environment 31, no. 11 (November 2008): 1663–1672. doi:10.1111/j.1365-3040.2008.01869.x.en_US
dc.description.abstractForest ecosystems release large amounts of carbon to the atmosphere from fine‐root respiration (Rr), but the control of this flux and its temperature sensitivity (Q10) are poorly understood. We attempted to: (1) identify the factors limiting this flux using additions of glucose and an electron transport uncoupler (carbonyl cyanide m‐chlorophenylhydrazone); and (2) improve yearly estimates of Rr by directly measuring its Q10in situ using temperature‐controlled cuvettes buried around intact, attached roots. The proximal limits of Rr of loblolly pine (Pinus taeda L.) trees exposed to free‐air CO2 enrichment (FACE) and N fertilization were seasonally variable; enzyme capacity limited Rr in the winter, and a combination of substrate supply and adenylate availability limited Rr in summer months. The limiting factors of Rr were not affected by elevated CO2 or N fertilization. Elevated CO2 increased annual stand‐level Rr by 34% whereas the combination of elevated CO2 and N fertilization reduced Rr by 40%. Measurements of in situ Rr with high temporal resolution detected diel patterns that were correlated with canopy photosynthesis with a lag of 1 d or less as measured by eddy covariance, indicating a dynamic link between canopy photosynthesis and root respiration. These results suggest that Rr is coupled to daily canopy photosynthesis and increases with carbon allocation below ground.en_US
dc.rightsThis Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).en_US
dc.titleFine-Root Respiration in a Loblolly Pine (Pinus taeda L.) Forest Exposed to Elevated CO2 and N Fertilizationen_US
mus.citation.journaltitlePlant, Cell and Environmenten_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.departmentLand Resources & Environmental Sciences.en_US
mus.relation.universityMontana State University - Bozemanen_US

Files in this item


This item appears in the following Collection(s)

Show simple item record

MSU uses DSpace software, copyright © 2002-2017  Duraspace. For library collections that are not accessible, we are committed to providing reasonable accommodations and timely access to users with disabilities. For assistance, please submit an accessibility request for library material.