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A dynamic leaf gas-exchange strategy is conserved in woody plants under changing ambient CO2 : evidence from carbon isotope discrimination in paleo and CO2 enrichment studies.
Journal article

A dynamic leaf gas-exchange strategy is conserved in woody plants under changing ambient CO2 : evidence from carbon isotope discrimination in paleo and CO2 enrichment studies.

  • Voelker SL Department of Forest Ecosystems & Society, Oregon State University, Corvallis, OR, 97331, USA.
  • Brooks JR Western Ecology Division, National Health and Environmental Effects Research Laboratory (NHEERL), U.S. Environmental Protection Agency, 200 SW 35th Street, Corvallis, OR, 97333, USA.
  • Meinzer FC U.S.D.A. Forest Service, Pacific Northwest Research Station, 3200 SW Jefferson Way, Corvallis, OR, 97331, USA.
  • Anderson R Jack Baskin Engineering, University of California Santa Cruz, Santa Cruz, CA, 95604, USA.
  • Bader MK New Zealand Forest Research Institute (SCION), Te Papa Tipu Innovation Park, 20 Sala Street, 3046, Rotorua, New Zealand.
  • Battipaglia G Department of Environmental, Biological and Pharmaceutical Sciences and Technologies (DiSTABiF), Second University of Naples, 81100, Caserta, Italy.
  • Becklin KM Department of Ecology and Evolutionary Biology, University of Kansas, 1200 Sunnyside Avenue, Lawrence, KS, 66045, USA.
  • Beerling D Department of Animal and Plant Sciences, University of Sheffield, Sheffield, S10 2TN, UK.
  • Bert D UMR1202 BIOGECO, INRA, F-33610, Cestas, France.
  • Betancourt JL National Research Program, Water Mission Area, U.S. Geological Survey, Mail Stop 430, 12201 Sunrise Valley Drive, Reston, VA, 20192, USA.
  • Dawson TE Department of Integrative Biology, University of California Berkeley, 1105 Valley Life Science Bldg #3140, Berkeley, CA, 94720, USA.
  • Domec JC Bordeaux Sciences Agro, UMR ISPA 1391, INRA, 33175, Gradignan, France.
  • Guyette RP Department of Forestry, University of Missouri, 203 ABNR Building, Columbia, MO, 65211, USA.
  • Körner C Institute of Botany, University of Basel, Schonbeinstrasse 6, CH-4056, Basel, Switzerland.
  • Leavitt SW UMR1391 ISPA, INRA, 33140, Villenave d'Ornon, France.
  • Linder S Laboratory for Tree-Ring Research, University of Arizona, 1215 E. Lowell St., Tucson, AZ, 85721-0045, USA.
  • Marshall JD Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, PO Box 49, SE-230 53, Alnarp, Sweden.
  • Mildner M Institute of Botany, University of Basel, Schonbeinstrasse 6, CH-4056, Basel, Switzerland.
  • Ogée J Bordeaux Sciences Agro, UMR ISPA 1391, INRA, 33175, Gradignan, France.
  • Panyushkina I Laboratory for Tree-Ring Research, University of Arizona, 1215 E. Lowell St., Tucson, AZ, 85721-0045, USA.
  • Plumpton HJ UMR1391 ISPA, INRA, 33140, Villenave d'Ornon, France.
  • Pregitzer KS Department of Forest, Rangeland and Fire Sciences, University of Idaho, 875 Perimeter Drive, Moscow, ID, 83844, USA.
  • Saurer M Paul Scherrer Institute, CH-5323, Villigen, Switzerland.
  • Smith AR School of the Environment, Natural Resources and Geography, Bangor University, Gwynedd, LL57 2UW, UK.
  • Siegwolf RT Paul Scherrer Institute, CH-5323, Villigen, Switzerland.
  • Stambaugh MC Department of Forestry, University of Missouri, 203 ABNR Building, Columbia, MO, 65211, USA.
  • Talhelm AF Department of Forest, Rangeland and Fire Sciences, University of Idaho, 875 Perimeter Drive, Moscow, ID, 83844, USA.
  • Tardif JC Centre for Forest Interdisciplinary Research (C-FIR), University of Winnipeg, 515 Avenue Portage, Winnipeg, MB, Canada, R3B 2E9.
  • Van de Water PK Department of Earth & Environmental Sciences, California State University, Fresno, 2576 E. San Ramon Ave., Mail Stop ST-24, Fresno, CA, 93740, USA.
  • Ward JK Department of Ecology and Evolutionary Biology, University of Kansas, 1200 Sunnyside Avenue, Lawrence, KS, 66045, USA.
  • Wingate L Bordeaux Sciences Agro, UMR ISPA 1391, INRA, 33175, Gradignan, France.
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  • 2015-09-23
Published in:
  • Global change biology. - 2016
angiosperm
carbon dioxide
free-air CO2 enrichment
gymnosperm
optimal stomatal behavior
photosynthesis
stomatal conductance
water use efficiency
Carbon Dioxide
Carbon Isotopes
Cycadopsida
Magnoliopsida
Plant Leaves
Plant Stomata
Trees
English Rising atmospheric [CO2 ], ca , is expected to affect stomatal regulation of leaf gas-exchange of woody plants, thus influencing energy fluxes as well as carbon (C), water, and nutrient cycling of forests. Researchers have proposed various strategies for stomatal regulation of leaf gas-exchange that include maintaining a constant leaf internal [CO2 ], ci , a constant drawdown in CO2 (ca  - ci ), and a constant ci /ca . These strategies can result in drastically different consequences for leaf gas-exchange. The accuracy of Earth systems models depends in part on assumptions about generalizable patterns in leaf gas-exchange responses to varying ca . The concept of optimal stomatal behavior, exemplified by woody plants shifting along a continuum of these strategies, provides a unifying framework for understanding leaf gas-exchange responses to ca . To assess leaf gas-exchange regulation strategies, we analyzed patterns in ci inferred from studies reporting C stable isotope ratios (δ(13) C) or photosynthetic discrimination (∆) in woody angiosperms and gymnosperms that grew across a range of ca spanning at least 100 ppm. Our results suggest that much of the ca -induced changes in ci /ca occurred across ca spanning 200 to 400 ppm. These patterns imply that ca  - ci will eventually approach a constant level at high ca because assimilation rates will reach a maximum and stomatal conductance of each species should be constrained to some minimum level. These analyses are not consistent with canalization toward any single strategy, particularly maintaining a constant ci . Rather, the results are consistent with the existence of a broadly conserved pattern of stomatal optimization in woody angiosperms and gymnosperms. This results in trees being profligate water users at low ca , when additional water loss is small for each unit of C gain, and increasingly water-conservative at high ca , when photosystems are saturated and water loss is large for each unit C gain.
Language
  • English
Open access status
closed
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Persistent URL
https://sonar.ch/global/documents/231801
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