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Acclimation of leaf hydraulic conductance and stomatal conductance of Pinus taeda (loblolly pine) to long-term growth in elevated CO(2) (free-air CO(2) enrichment) and N-fertilization.

Publication ,  Journal Article
Domec, J-C; Palmroth, S; Ward, E; Maier, CA; Thérézien, M; Oren, R
Published in: Plant, cell & environment
November 2009

We investigated how leaf hydraulic conductance (K(leaf)) of loblolly pine trees is influenced by soil nitrogen amendment (N) in stands subjected to ambient or elevated CO(2) concentrations (CO(2)(a) and CO(2)(e), respectively). We also examined how K(leaf) varies with changes in reference leaf water potential (Psi(leaf-ref)) and stomatal conductance (g(s-ref)) calculated at vapour pressure deficit, D of 1 kPa. We detected significant reductions in K(leaf) caused by N and CO(2)(e), but neither treatment affected pre-dawn or midday Psi(leaf). We also detected a significant CO(2)(e)-induced reduction in g(s-ref) and Psi(leaf-ref). Among treatments, the sensitivity of K(leaf) to Psi(leaf) was directly related to a reference K(leaf) (K(leaf-ref) computed at Psi(leaf-ref)). This liquid-phase response was reflected in a similar gas-phase response, with g(s) sensitivity to D proportional to g(s-ref). Because leaves represented a substantial component of the whole-tree conductance, reduction in K(leaf) under CO(2)(e) affected whole-tree water use by inducing a decline in g(s-ref). The consequences of the acclimation of leaves to the treatments were: (1) trees growing under CO(2)(e) controlled morning leaf water status less than CO(2)(a) trees resulting in a higher diurnal loss of K(leaf); (2) the effect of CO(2)(e) on g(s-ref) was manifested only during times of high soil moisture.

Duke Scholars

Published In

Plant, cell & environment

DOI

EISSN

1365-3040

ISSN

0140-7791

Publication Date

November 2009

Volume

32

Issue

11

Start / End Page

1500 / 1512

Related Subject Headings

  • Plant Transpiration
  • Plant Stomata
  • Plant Leaves
  • Plant Biology & Botany
  • Pinus taeda
  • Nitrogen
  • Fertilizers
  • Droughts
  • Dehydration
  • Carbon Dioxide
 

Citation

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Domec, J.-C., Palmroth, S., Ward, E., Maier, C. A., Thérézien, M., & Oren, R. (2009). Acclimation of leaf hydraulic conductance and stomatal conductance of Pinus taeda (loblolly pine) to long-term growth in elevated CO(2) (free-air CO(2) enrichment) and N-fertilization. Plant, Cell & Environment, 32(11), 1500–1512. https://doi.org/10.1111/j.1365-3040.2009.02014.x
Domec, Jean-Christophe, Sari Palmroth, Eric Ward, Chris A. Maier, M. Thérézien, and Ram Oren. “Acclimation of leaf hydraulic conductance and stomatal conductance of Pinus taeda (loblolly pine) to long-term growth in elevated CO(2) (free-air CO(2) enrichment) and N-fertilization.Plant, Cell & Environment 32, no. 11 (November 2009): 1500–1512. https://doi.org/10.1111/j.1365-3040.2009.02014.x.
Domec, Jean-Christophe, et al. “Acclimation of leaf hydraulic conductance and stomatal conductance of Pinus taeda (loblolly pine) to long-term growth in elevated CO(2) (free-air CO(2) enrichment) and N-fertilization.Plant, Cell & Environment, vol. 32, no. 11, Nov. 2009, pp. 1500–12. Epmc, doi:10.1111/j.1365-3040.2009.02014.x.
Journal cover image

Published In

Plant, cell & environment

DOI

EISSN

1365-3040

ISSN

0140-7791

Publication Date

November 2009

Volume

32

Issue

11

Start / End Page

1500 / 1512

Related Subject Headings

  • Plant Transpiration
  • Plant Stomata
  • Plant Leaves
  • Plant Biology & Botany
  • Pinus taeda
  • Nitrogen
  • Fertilizers
  • Droughts
  • Dehydration
  • Carbon Dioxide