The validity of optimal leaf traits modelled on environmental conditions

Keith J. Bloomfield, I. Colin Prentice, Lucas A. Cernusak, Derek Eamus, Belinda E. Medlyn, Rizwana Rumman, Ian J. Wright, Matthias M. Boer, Peter Cale, James Cleverly, John J. G. Egerton, David S. Ellsworth, Bradley J. Evans, Lucy S. Hayes, Michael F. Hutchinson, Michael J. Liddell, Craig Macfarlane, Wayne S. Meyer, Henrique F. Togashi, Tim Wardlaw & 2 others Lingling Zhu, Owen K. Atkin

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The ratio of leaf intercellular to ambient CO2 (χ) is modulated by stomatal conductance (gs). These quantities link carbon (C) assimilation with transpiration, and along with photosynthetic capacities (Vcmax and Jmax) are required to model terrestrial C uptake. We use optimization criteria based on the growth environment to generate predicted values of photosynthetic and water-use efficiency traits and test these against a unique dataset.

Leaf gas-exchange parameters and carbon isotope discrimination were analysed in relation to local climate across a continental network of study sites. Sun-exposed leaves of 50 species at seven sites were measured in contrasting seasons.

Values of χ predicted from growth temperature and vapour pressure deficit were closely correlated to ratios derived from C isotope (δ13C) measurements. Correlations were stronger in the growing season. Predicted values of photosynthetic traits, including carboxylation capacity (Vcmax), derived from δ13C, growth temperature and solar radiation, showed meaningful agreement with inferred values derived from gas-exchange measurements. Between-site differences in water-use efficiency were, however, only weakly linked to the plant's growth environment and did not show seasonal variation. 
These results support the general hypothesis that many key parameters required by Earth system models are adaptive and predictable from plants’ growth environments.
LanguageEnglish
Pages1409-1423
Number of pages15
JournalNew Phytologist
Volume221
Issue number3
Early online date22 Sep 2018
DOIs
Publication statusPublished - Feb 2019

Fingerprint

environmental factors
water use efficiency
gas exchange
isotopes
Growth
plant growth
leaves
carbon
carboxylation
vapor pressure
Gases
stomatal conductance
assimilation (physiology)
Carbon Isotopes
transpiration
temperature
solar radiation
Vapor Pressure
seasonal variation
growing season

Keywords

  • aridity
  • photosynthesis
  • stable isotopes
  • stomatal conductance (gs)
  • temperature
  • water-use efficiency

Cite this

Bloomfield, K. J., Prentice, I. C., Cernusak, L. A., Eamus, D., Medlyn, B. E., Rumman, R., ... Atkin, O. K. (2019). The validity of optimal leaf traits modelled on environmental conditions. New Phytologist, 221(3), 1409-1423. https://doi.org/10.1111/nph.15495
Bloomfield, Keith J. ; Prentice, I. Colin ; Cernusak, Lucas A. ; Eamus, Derek ; Medlyn, Belinda E. ; Rumman, Rizwana ; Wright, Ian J. ; Boer, Matthias M. ; Cale, Peter ; Cleverly, James ; Egerton, John J. G. ; Ellsworth, David S. ; Evans, Bradley J. ; Hayes, Lucy S. ; Hutchinson, Michael F. ; Liddell, Michael J. ; Macfarlane, Craig ; Meyer, Wayne S. ; Togashi, Henrique F. ; Wardlaw, Tim ; Zhu, Lingling ; Atkin, Owen K. / The validity of optimal leaf traits modelled on environmental conditions. In: New Phytologist. 2019 ; Vol. 221, No. 3. pp. 1409-1423.
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Bloomfield, KJ, Prentice, IC, Cernusak, LA, Eamus, D, Medlyn, BE, Rumman, R, Wright, IJ, Boer, MM, Cale, P, Cleverly, J, Egerton, JJG, Ellsworth, DS, Evans, BJ, Hayes, LS, Hutchinson, MF, Liddell, MJ, Macfarlane, C, Meyer, WS, Togashi, HF, Wardlaw, T, Zhu, L & Atkin, OK 2019, 'The validity of optimal leaf traits modelled on environmental conditions', New Phytologist, vol. 221, no. 3, pp. 1409-1423. https://doi.org/10.1111/nph.15495

The validity of optimal leaf traits modelled on environmental conditions. / Bloomfield, Keith J.; Prentice, I. Colin; Cernusak, Lucas A.; Eamus, Derek; Medlyn, Belinda E.; Rumman, Rizwana; Wright, Ian J.; Boer, Matthias M.; Cale, Peter; Cleverly, James; Egerton, John J. G.; Ellsworth, David S.; Evans, Bradley J.; Hayes, Lucy S.; Hutchinson, Michael F.; Liddell, Michael J.; Macfarlane, Craig; Meyer, Wayne S.; Togashi, Henrique F.; Wardlaw, Tim; Zhu, Lingling; Atkin, Owen K.

In: New Phytologist, Vol. 221, No. 3, 02.2019, p. 1409-1423.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Rumman, Rizwana

AU - Wright, Ian J.

AU - Boer, Matthias M.

AU - Cale, Peter

AU - Cleverly, James

AU - Egerton, John J. G.

AU - Ellsworth, David S.

AU - Evans, Bradley J.

AU - Hayes, Lucy S.

AU - Hutchinson, Michael F.

AU - Liddell, Michael J.

AU - Macfarlane, Craig

AU - Meyer, Wayne S.

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AU - Wardlaw, Tim

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Bloomfield KJ, Prentice IC, Cernusak LA, Eamus D, Medlyn BE, Rumman R et al. The validity of optimal leaf traits modelled on environmental conditions. New Phytologist. 2019 Feb;221(3):1409-1423. https://doi.org/10.1111/nph.15495