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Plasticity in hydraulic architecture of Scots pine across Eurasia

Poyatos, R.; Martínez-Vilalta, J.; Cermák, J.; Ceulemans, R.; Granier, A.; Irvine, J.; Köstner, B.; Lagergren, Fredrik LU ; Meiresonne, L. and Nadezhdina, N., et al. (2007) In Oecologia 153(2). p.245-259
Abstract
Widespread tree species must show physiological and structural plasticity to deal with contrasting water balance conditions. To investigate these plasticity mechanisms, a meta-analysis of Pinus sylvestris L. sap flow and its response to environmental variables was conducted using datasets from across its whole geographical range. For each site, a Jarvis-type, multiplicative model was used to fit the relationship between sap flow and photosynthetically active radiation, vapour pressure deficit (D) and soil moisture deficit (SMD); and a logarithmic function was used to characterize the response of stomatal conductance (G(s)) to D. The fitted parameters of those models were regressed against climatic variables to study the acclimation of... (More)
Widespread tree species must show physiological and structural plasticity to deal with contrasting water balance conditions. To investigate these plasticity mechanisms, a meta-analysis of Pinus sylvestris L. sap flow and its response to environmental variables was conducted using datasets from across its whole geographical range. For each site, a Jarvis-type, multiplicative model was used to fit the relationship between sap flow and photosynthetically active radiation, vapour pressure deficit (D) and soil moisture deficit (SMD); and a logarithmic function was used to characterize the response of stomatal conductance (G(s)) to D. The fitted parameters of those models were regressed against climatic variables to study the acclimation of Scots pine to dry/warm conditions. The absolute value of sap flow and its sensitivity to D and SMD increased with the average summer evaporative demand. However, relative sensitivity of G(s) to D (m/G(s,ref) where m is the slope and G(s,ref) is reference G(s) at D = 1 kPa) did not increase with evaporative demand across populations, and transpiration per unit leaf area at a given D increased accordingly in drier/warmer climates. This physiological plasticity was linked to the previously reported climate- and size-related structural acclimation of leaf to sapwood area ratios. G(s,ref), and its absolute sensitivity to D (m), tended to decrease with age/height of the trees as previously reported for other pine species. It is unclear why Scots pines have higher transpiration rates at drier/warmer sites, at the expense of lower water-use efficiency. In any case, our results suggest that these structural adjustments may not be enough to prevent lower xylem tensions at the driest sites. (Less)
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Contribution to journal
publication status
published
subject
keywords
stomatal conductance, leaf area : sapwood area, hydraulic plasticity, sap flow, Pinus sylvestris
in
Oecologia
volume
153
issue
2
pages
245 - 259
publisher
Springer
external identifiers
  • Scopus:34547781680
ISSN
1432-1939
DOI
10.1007/s00442-007-0740-0
language
English
LU publication?
yes
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6ba85689-559f-47c2-8eea-74c9caeaf66b (old id 642676)
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http://www.springerlink.com/content/01k5130k030r07h2/fulltext.pdf
date added to LUP
2007-12-17 11:01:43
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2016-12-04 04:40:21
@misc{6ba85689-559f-47c2-8eea-74c9caeaf66b,
  abstract     = {Widespread tree species must show physiological and structural plasticity to deal with contrasting water balance conditions. To investigate these plasticity mechanisms, a meta-analysis of Pinus sylvestris L. sap flow and its response to environmental variables was conducted using datasets from across its whole geographical range. For each site, a Jarvis-type, multiplicative model was used to fit the relationship between sap flow and photosynthetically active radiation, vapour pressure deficit (D) and soil moisture deficit (SMD); and a logarithmic function was used to characterize the response of stomatal conductance (G(s)) to D. The fitted parameters of those models were regressed against climatic variables to study the acclimation of Scots pine to dry/warm conditions. The absolute value of sap flow and its sensitivity to D and SMD increased with the average summer evaporative demand. However, relative sensitivity of G(s) to D (m/G(s,ref) where m is the slope and G(s,ref) is reference G(s) at D = 1 kPa) did not increase with evaporative demand across populations, and transpiration per unit leaf area at a given D increased accordingly in drier/warmer climates. This physiological plasticity was linked to the previously reported climate- and size-related structural acclimation of leaf to sapwood area ratios. G(s,ref), and its absolute sensitivity to D (m), tended to decrease with age/height of the trees as previously reported for other pine species. It is unclear why Scots pines have higher transpiration rates at drier/warmer sites, at the expense of lower water-use efficiency. In any case, our results suggest that these structural adjustments may not be enough to prevent lower xylem tensions at the driest sites.},
  author       = {Poyatos, R. and Martínez-Vilalta, J. and Cermák, J. and Ceulemans, R. and Granier, A. and Irvine, J. and Köstner, B. and Lagergren, Fredrik and Meiresonne, L. and Nadezhdina, N. and Zimmermann, R. and Llorens, P. and Mencuccini, M.},
  issn         = {1432-1939},
  keyword      = {stomatal conductance,leaf area : sapwood area,hydraulic plasticity,sap flow,Pinus sylvestris},
  language     = {eng},
  number       = {2},
  pages        = {245--259},
  publisher    = {ARRAY(0x8725058)},
  series       = {Oecologia},
  title        = {Plasticity in hydraulic architecture of Scots pine across Eurasia},
  url          = {http://dx.doi.org/10.1007/s00442-007-0740-0},
  volume       = {153},
  year         = {2007},
}