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Efflux and assimilation of xylem-transported CO2 in stems and leaves of tree species with different wood anatomy

Roberto Luis Salomon Moreno (UGent) , Linus De Roo (UGent) , Samuel Bodé (UGent) , Pascal Boeckx (UGent) and Kathy Steppe (UGent)
(2021) PLANT CELL AND ENVIRONMENT.
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Abstract
Determining the fate of CO2 respired in woody tissues is necessary to understand plant respiratory physiology and to evaluate CO2 recycling mechanisms. An aqueous 13 C-enriched CO2 solution was infused into the stem of 3-4 m tall trees to estimate efflux and assimilation of xylem-transported CO2 via cavity ring down laser spectroscopy and isotope ratio mass spectrometry, respectively. Different tree locations (lower stem, upper stem and leafy shoots) and tissues (xylem, bark and leaves) were monitored in species with tracheid, diffuse- and ring- porous wood anatomy (cedar, maple and oak, respectively). Radial xylem CO2 diffusivity and xylem [CO2 ] were lower in cedar relative to maple and oak trees, thereby limiting label diffusion. Part of the labeled 13 CO2 was assimilated in cedar (8.7 %) and oak (20.6 %) trees, mostly in xylem and bark tissues of the stem, while limited solution uptake in maple trees hindered detection of label assimilation. Little label reached foliar tissues, suggesting substantial label loss along the stem-branch transition following reductions in the radial diffusive pathway. Differences in respiration rates and radial xylem CO2 diffusivity (lower in conifer relative to angiosperm species) might reconcile discrepancies in efflux and assimilation of xylem-transported CO2 so far observed between taxonomic clades. This article is protected by copyright. All rights reserved.

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MLA
Salomon Moreno, Roberto Luis, et al. “Efflux and Assimilation of Xylem-Transported CO2 in Stems and Leaves of Tree Species with Different Wood Anatomy.” PLANT CELL AND ENVIRONMENT, 2021, doi:10.1111/pce.14062.
APA
Salomon Moreno, R. L., De Roo, L., Bodé, S., Boeckx, P., & Steppe, K. (2021). Efflux and assimilation of xylem-transported CO2 in stems and leaves of tree species with different wood anatomy. PLANT CELL AND ENVIRONMENT. https://doi.org/10.1111/pce.14062
Chicago author-date
Salomon Moreno, Roberto Luis, Linus De Roo, Samuel Bodé, Pascal Boeckx, and Kathy Steppe. 2021. “Efflux and Assimilation of Xylem-Transported CO2 in Stems and Leaves of Tree Species with Different Wood Anatomy.” PLANT CELL AND ENVIRONMENT. https://doi.org/10.1111/pce.14062.
Chicago author-date (all authors)
Salomon Moreno, Roberto Luis, Linus De Roo, Samuel Bodé, Pascal Boeckx, and Kathy Steppe. 2021. “Efflux and Assimilation of Xylem-Transported CO2 in Stems and Leaves of Tree Species with Different Wood Anatomy.” PLANT CELL AND ENVIRONMENT. doi:10.1111/pce.14062.
Vancouver
1.
Salomon Moreno RL, De Roo L, Bodé S, Boeckx P, Steppe K. Efflux and assimilation of xylem-transported CO2 in stems and leaves of tree species with different wood anatomy. PLANT CELL AND ENVIRONMENT. 2021;
IEEE
[1]
R. L. Salomon Moreno, L. De Roo, S. Bodé, P. Boeckx, and K. Steppe, “Efflux and assimilation of xylem-transported CO2 in stems and leaves of tree species with different wood anatomy,” PLANT CELL AND ENVIRONMENT, 2021.
@article{8704409,
  abstract     = {{Determining the fate of CO2 respired in woody tissues is necessary to understand plant respiratory physiology and to evaluate CO2 recycling mechanisms. An aqueous 13 C-enriched CO2 solution was infused into the stem of 3-4 m tall trees to estimate efflux and assimilation of xylem-transported CO2 via cavity ring down laser spectroscopy and isotope ratio mass spectrometry, respectively. Different tree locations (lower stem, upper stem and leafy shoots) and tissues (xylem, bark and leaves) were monitored in species with tracheid, diffuse- and ring- porous wood anatomy (cedar, maple and oak, respectively). Radial xylem CO2 diffusivity and xylem [CO2 ] were lower in cedar relative to maple and oak trees, thereby limiting label diffusion. Part of the labeled 13 CO2 was assimilated in cedar (8.7 %) and oak (20.6 %) trees, mostly in xylem and bark tissues of the stem, while limited solution uptake in maple trees hindered detection of label assimilation. Little label reached foliar tissues, suggesting substantial label loss along the stem-branch transition following reductions in the radial diffusive pathway. Differences in respiration rates and radial xylem CO2 diffusivity (lower in conifer relative to angiosperm species) might reconcile discrepancies in efflux and assimilation of xylem-transported CO2 so far observed between taxonomic clades. This article is protected by copyright. All rights reserved.}},
  author       = {{Salomon Moreno, Roberto Luis and De Roo, Linus and Bodé, Samuel and Boeckx, Pascal and Steppe, Kathy}},
  issn         = {{0140-7791}},
  journal      = {{PLANT CELL AND ENVIRONMENT}},
  language     = {{eng}},
  title        = {{Efflux and assimilation of xylem-transported CO2 in stems and leaves of tree species with different wood anatomy}},
  url          = {{http://dx.doi.org/10.1111/pce.14062}},
  year         = {{2021}},
}
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