Advanced search
1 file | 1.03 MB Add to list

Isotope ratio laser spectroscopy to disentangle xylem-transported from locally respired CO2 in stem CO2 efflux

(2019) TREE PHYSIOLOGY. 39(5). p.819-830
Author
Organization
Abstract
Respired CO2 in woody tissues radially diffuses to the atmosphere or it is transported upward with the transpiration stream, making the origin of CO2 in stem CO2 efflux (EA) uncertain, which may confound stem respiration (RS) estimates. An aqueous 13C-enriched solution was infused into stems of Populus tremula L. trees, and real-time measurements of 13C-CO2 and 12C-CO2 in EA were performed via Cavity Ring Down Laser Spectroscopy (CRDS). The contribution of locally respired CO2 (LCO2) and xylem-transported CO2 (TCO2) to EA was estimated from their different isotopic composition. Mean daily values of TCO2/EA ranged from 13% to 38%, evidencing the notable role that xylem CO2 transport plays in the assessment of stem respiration. Mean daily TCO2/EA did not differ between treatments of drought stress and light exclusion of woody tissues, but they showed different TCO2/EA dynamics on a sub-daily time scale. Sub-daily CO2 diffusion patterns were explained by a light-induced axial CO2 gradient ascribed to woody tissue photosynthesis, and the resistance to radial CO2 diffusion determined by bark water content. Here, we demonstrate the outstanding potential of CRDS paired with 13C-CO2 labelling to advance in the understanding of CO2 movement at the plant−atmosphere interface and the respiratory physiology in woody tissues.
Keywords
C-13-CO2 enrichment, drought stress, laser spectroscopy, radial CO2 diffusion, stem respiration, xylem CO2 transport, WOODY TISSUE PHOTOSYNTHESIS, HIGH TEMPORAL RESOLUTION, BETWEEN-TREE VARIATION, CARBON-DIOXIDE, PINUS-SYLVESTRIS, SAP FLOW, PLANT RESPIRATION, C-13-LABELED CO2, EXTERNAL FLUXES, DYNAMICS

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 1.03 MB

Citation

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

MLA
Salomon Moreno, Roberto Luis, et al. “Isotope Ratio Laser Spectroscopy to Disentangle Xylem-Transported from Locally Respired CO2 in Stem CO2 Efflux.” TREE PHYSIOLOGY, vol. 39, no. 5, 2019, pp. 819–30, doi:10.1093/treephys/tpy152.
APA
Salomon Moreno, R. L., De Roo, L., Bodé, S., Boeckx, P., & Steppe, K. (2019). Isotope ratio laser spectroscopy to disentangle xylem-transported from locally respired CO2 in stem CO2 efflux. TREE PHYSIOLOGY, 39(5), 819–830. https://doi.org/10.1093/treephys/tpy152
Chicago author-date
Salomon Moreno, Roberto Luis, Linus De Roo, Samuel Bodé, Pascal Boeckx, and Kathy Steppe. 2019. “Isotope Ratio Laser Spectroscopy to Disentangle Xylem-Transported from Locally Respired CO2 in Stem CO2 Efflux.” TREE PHYSIOLOGY 39 (5): 819–30. https://doi.org/10.1093/treephys/tpy152.
Chicago author-date (all authors)
Salomon Moreno, Roberto Luis, Linus De Roo, Samuel Bodé, Pascal Boeckx, and Kathy Steppe. 2019. “Isotope Ratio Laser Spectroscopy to Disentangle Xylem-Transported from Locally Respired CO2 in Stem CO2 Efflux.” TREE PHYSIOLOGY 39 (5): 819–830. doi:10.1093/treephys/tpy152.
Vancouver
1.
Salomon Moreno RL, De Roo L, Bodé S, Boeckx P, Steppe K. Isotope ratio laser spectroscopy to disentangle xylem-transported from locally respired CO2 in stem CO2 efflux. TREE PHYSIOLOGY. 2019;39(5):819–30.
IEEE
[1]
R. L. Salomon Moreno, L. De Roo, S. Bodé, P. Boeckx, and K. Steppe, “Isotope ratio laser spectroscopy to disentangle xylem-transported from locally respired CO2 in stem CO2 efflux,” TREE PHYSIOLOGY, vol. 39, no. 5, pp. 819–830, 2019.
@article{8606411,
  abstract     = {{Respired CO2 in woody tissues radially diffuses to the atmosphere or it is transported upward with the transpiration stream, making the origin of CO2 in stem CO2 efflux (EA) uncertain, which may confound stem respiration (RS) estimates. An aqueous 13C-enriched solution was infused into stems of Populus tremula L. trees, and real-time measurements of 13C-CO2 and 12C-CO2 in EA were performed via Cavity Ring Down Laser Spectroscopy (CRDS). The contribution of locally respired CO2 (LCO2) and xylem-transported CO2 (TCO2) to EA was estimated from their different isotopic composition. Mean daily values of TCO2/EA ranged from 13% to 38%, evidencing the notable role that xylem CO2 transport plays in the assessment of stem respiration. Mean daily TCO2/EA did not differ between treatments of drought stress and light exclusion of woody tissues, but they showed different TCO2/EA dynamics on a sub-daily time scale. Sub-daily CO2 diffusion patterns were explained by a light-induced axial CO2 gradient ascribed to woody tissue photosynthesis, and the resistance to radial CO2 diffusion determined by bark water content. Here, we demonstrate the outstanding potential of CRDS paired with 13C-CO2 labelling to advance in the understanding of CO2 movement at the plant−atmosphere interface and the respiratory physiology in woody tissues.}},
  author       = {{Salomon Moreno, Roberto Luis and De Roo, Linus and Bodé, Samuel and Boeckx, Pascal and Steppe, Kathy}},
  issn         = {{0829-318X}},
  journal      = {{TREE PHYSIOLOGY}},
  keywords     = {{C-13-CO2 enrichment,drought stress,laser spectroscopy,radial CO2 diffusion,stem respiration,xylem CO2 transport,WOODY TISSUE PHOTOSYNTHESIS,HIGH TEMPORAL RESOLUTION,BETWEEN-TREE VARIATION,CARBON-DIOXIDE,PINUS-SYLVESTRIS,SAP FLOW,PLANT RESPIRATION,C-13-LABELED CO2,EXTERNAL FLUXES,DYNAMICS}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{819--830}},
  title        = {{Isotope ratio laser spectroscopy to disentangle xylem-transported from locally respired CO2 in stem CO2 efflux}},
  url          = {{http://dx.doi.org/10.1093/treephys/tpy152}},
  volume       = {{39}},
  year         = {{2019}},
}

Altmetric
View in Altmetric
Web of Science
Times cited: