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Interclonal variation, coordination, and trade-offs between hydraulic conductance and gas exchange in Pinus radiata: consequences on plant growth and wood density.

Publication ,  Journal Article
Rodríguez-Gamir, J; Xue, J; Meason, DF; Clearwater, M; Clinton, PW; Domec, J-C
Published in: Journal of experimental botany
March 2021

Stem growth reflects genetic and phenotypic differences within a tree species. The plant hydraulic system regulates the carbon economy, and therefore variations in growth and wood density. A whole-organism perspective, by partitioning the hydraulic system, is crucial for understanding the physical and physiological processes that coordinately mediate plant growth. The aim of this study was to determine whether the relationships and trade-offs between (i) hydraulic traits and their relative contribution to the whole-plant hydraulic system, (ii) plant water transport, (iii) CO2 assimilation, (iv) plant growth, and (v) wood density are revealed at the interclonal level within a variable population of 10 Pinus radiata (D. Don) clones for these characters. We demonstrated a strong coordination between several plant organs regarding their hydraulic efficiency. Hydraulic efficiency, gas exchange, and plant growth were intimately linked. Small reductions in stem wood density were related to a large increase in sapwood hydraulic efficiency, and thus to plant growth. However, stem growth rate was negatively related to wood density. We discuss insights explaining the relationships and trade-offs of the plant traits examined in this study. These insights provide a better understanding of the existing coordination, likely to be dependent on genetics, between the biophysical structure of wood, plant growth, hydraulic partitioning, and physiological plant functions in P. radiata.

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Published In

Journal of experimental botany

DOI

EISSN

1460-2431

ISSN

0022-0957

Publication Date

March 2021

Volume

72

Issue

7

Start / End Page

2419 / 2433

Related Subject Headings

  • Wood
  • Water
  • Trees
  • Plant Leaves
  • Plant Biology & Botany
  • Pinus
  • 3108 Plant biology
  • 3101 Biochemistry and cell biology
  • 3004 Crop and pasture production
  • 0703 Crop and Pasture Production
 

Citation

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Rodríguez-Gamir, J., Xue, J., Meason, D. F., Clearwater, M., Clinton, P. W., & Domec, J.-C. (2021). Interclonal variation, coordination, and trade-offs between hydraulic conductance and gas exchange in Pinus radiata: consequences on plant growth and wood density. Journal of Experimental Botany, 72(7), 2419–2433. https://doi.org/10.1093/jxb/eraa587
Rodríguez-Gamir, Juan, Jianming Xue, Dean F. Meason, Michael Clearwater, Peter W. Clinton, and Jean-Christophe Domec. “Interclonal variation, coordination, and trade-offs between hydraulic conductance and gas exchange in Pinus radiata: consequences on plant growth and wood density.Journal of Experimental Botany 72, no. 7 (March 2021): 2419–33. https://doi.org/10.1093/jxb/eraa587.
Rodríguez-Gamir J, Xue J, Meason DF, Clearwater M, Clinton PW, Domec J-C. Interclonal variation, coordination, and trade-offs between hydraulic conductance and gas exchange in Pinus radiata: consequences on plant growth and wood density. Journal of experimental botany. 2021 Mar;72(7):2419–33.
Rodríguez-Gamir, Juan, et al. “Interclonal variation, coordination, and trade-offs between hydraulic conductance and gas exchange in Pinus radiata: consequences on plant growth and wood density.Journal of Experimental Botany, vol. 72, no. 7, Mar. 2021, pp. 2419–33. Epmc, doi:10.1093/jxb/eraa587.
Rodríguez-Gamir J, Xue J, Meason DF, Clearwater M, Clinton PW, Domec J-C. Interclonal variation, coordination, and trade-offs between hydraulic conductance and gas exchange in Pinus radiata: consequences on plant growth and wood density. Journal of experimental botany. 2021 Mar;72(7):2419–2433.
Journal cover image

Published In

Journal of experimental botany

DOI

EISSN

1460-2431

ISSN

0022-0957

Publication Date

March 2021

Volume

72

Issue

7

Start / End Page

2419 / 2433

Related Subject Headings

  • Wood
  • Water
  • Trees
  • Plant Leaves
  • Plant Biology & Botany
  • Pinus
  • 3108 Plant biology
  • 3101 Biochemistry and cell biology
  • 3004 Crop and pasture production
  • 0703 Crop and Pasture Production