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

(2021) PLANT CELL AND ENVIRONMENT. 44(11). p.3494-3508
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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 C-13-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 (CO2)-C-13 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 the 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.
Keywords
C-CO2 labelling, carbon allocation, CO2 diffusion, CO2 recycling, plant respiration, stem CO2 efflux, woody tissue photosynthesis, xylem CO2 transport, RESPIRED CO2, TISSUE PHOTOSYNTHESIS, C-13-LABELED CO2, CARBON-DIOXIDE, RESPIRATION, TRANSPIRATION, DIFFUSION, FLUXES, FATE, SAP

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Citation

Please use this url to cite or link to this publication:

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, vol. 44, no. 11, 2021, pp. 3494–508, 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, 44(11), 3494–3508. 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 44 (11): 3494–3508. 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 44 (11): 3494–3508. 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;44(11):3494–508.
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, vol. 44, no. 11, pp. 3494–3508, 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 C-13-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 (CO2)-C-13 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 the 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.}},
  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}},
  keywords     = {{C-CO2 labelling,carbon allocation,CO2 diffusion,CO2 recycling,plant respiration,stem CO2 efflux,woody tissue photosynthesis,xylem CO2 transport,RESPIRED CO2,TISSUE PHOTOSYNTHESIS,C-13-LABELED CO2,CARBON-DIOXIDE,RESPIRATION,TRANSPIRATION,DIFFUSION,FLUXES,FATE,SAP}},
  language     = {{eng}},
  number       = {{11}},
  pages        = {{3494--3508}},
  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}},
  volume       = {{44}},
  year         = {{2021}},
}

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