The validity of optimal leaf traits modelled on environmental conditions

File Description SizeFormat 
Validity of optimal leaf traits Final accepted version, full ms[40].docxAccepted version1.97 MBMicrosoft WordView/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:Faculty of Natural Sciences
Department of Life Sciences



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Creative Commons