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The validity of optimal leaf traits modelled on environmental conditions
File | Description | Size | Format | |
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Validity of optimal leaf traits Final accepted version, full ms[40].docx | Accepted version | 1.97 MB | Microsoft Word | View/Open |
Title: | The validity of optimal leaf traits modelled on environmental conditions |
Authors: | 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 |
Item Type: | Journal Article |
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 optimisation 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 (δ13 C) measurements. Correlations were stronger in the growing season. Predicted values of photosynthetic traits, including carboxylation capacity (Vcmax ), derived from δ13 C, 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. |
Issue Date: | 1-Feb-2019 |
Date of Acceptance: | 7-Sep-2018 |
URI: | http://hdl.handle.net/10044/1/63241 |
DOI: | https://doi.org/10.1111/nph.15495 |
ISSN: | 0028-646X |
Publisher: | Wiley |
Start Page: | 1409 |
End Page: | 1423 |
Journal / Book Title: | New Phytologist |
Volume: | 221 |
Issue: | 3 |
Copyright Statement: | © 2018 Owner. This is the accepted version of the following article: Bloomfield, K. J., Prentice, I. C., Cernusak, L. A., Eamus, D. , Medlyn, B. E., Rumman, R. , Wright, I. J., Boer, M. M., Cale, P. , Cleverly, J. , Egerton, J. J., Ellsworth, D. S., Evans, B. J., Hayes, L. S., Hutchinson, M. F., Liddell, M. J., Macfarlane, C. , Meyer, W. S., Togashi, H. F., Wardlaw, T. , Zhu, L. and Atkin, O. K. (2019), The validity of optimal leaf traits modelled on environmental conditions. New Phytol, 221: 1409-1423. doi:10.1111/nph.15495, which has been published in final form at https://doi.org/10.1111/nph.15495. |
Sponsor/Funder: | AXA Research Fund |
Funder's Grant Number: | AXA Chair Programme in Biosphere and Climate Impacts |
Keywords: | Science & Technology Life Sciences & Biomedicine Plant Sciences aridity photosynthesis stable isotopes stomatal conductance (g(s)) temperature water-use efficiency CARBON-ISOTOPE DISCRIMINATION WATER-USE EFFICIENCY STOMATAL CONDUCTANCE ATMOSPHERIC CO2 PHOTOSYNTHETIC CAPACITY MESOPHYLL CONDUCTANCE TEMPERATURE RESPONSE OPTIMIZATION THEORY BIOCHEMICAL-MODEL GAS-EXCHANGE aridity photosynthesis stable isotopes stomatal conductance (gs) temperature water-use efficiency aridity photosynthesis stable isotopes stomatal conductance (gs) temperature water-use efficiency Plant Biology & Botany 06 Biological Sciences 07 Agricultural and Veterinary Sciences |
Publication Status: | Published |
Conference Place: | England |
Online Publication Date: | 2018-09-22 |
Appears in Collections: | Department of Life Sciences Faculty of Natural Sciences |