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Updated: May 20, 2026

Design and Operation of a Continuous 13C and 15N Labeling Chamber for Uniform or Differential, Metabolic and Structural, Plant Isotope Labeling
Published on: January 16, 2014
Response to Comment on "Unexpected reversal of C3 versus C4 grass response to elevated CO2 during a 20-year field
Peter B Reich1,2, Sarah E Hobbie3, Tali D Lee4
1Department of Forest Resources, University of Minnesota, St. Paul, MN 55108, USA. preich@umn.edu.
Abstract:
Wolf and Ziska suggest that soil and species attributes can explain an unexpected 20-year reversal of C3-C4 grass responses to elevated CO2 This is consistent with our original interpretation; however, we disagree with the assertion that such explanations somehow render our results irrelevant for questioning a long-standing paradigm of plant response to CO2 based on C3-C4 differences in photosynthetic pathway.
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