Imperial College London

Professor Iain Colin Prentice

Faculty of Natural SciencesDepartment of Life Sciences (Silwood Park)

Chair in Biosphere and Climate Impacts
 
 
 
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Contact

 

+44 (0)20 7594 2354c.prentice

 
 
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Location

 

1.1Centre for Population BiologySilwood Park

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Summary

 

Publications

Citation

BibTex format

@article{Wang:2020:10.1111/gcb.14980,
author = {Wang, H and Atkin, OK and Keenan, TF and Smith, NG and Wright, IJ and Bloomfield, KJ and Kattge, J and Reich, PB and Prentice, IC},
doi = {10.1111/gcb.14980},
journal = {Global Change Biology},
pages = {2573--2583},
title = {Acclimation of leaf respiration consistent with optimal photosynthetic capacity},
url = {http://dx.doi.org/10.1111/gcb.14980},
volume = {26},
year = {2020}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Plant respiration is an important contributor to the proposed positive global carbon-cycle feedback to climate change. However, as a major component, leaf mitochondrial (‘dark’) respiration (Rd) differs among species adapted to contrasting environments and is known to acclimate to sustained changes in temperature. No accepted theory explains these phenomena or predicts its magnitude. Here we propose that the acclimation of Rd follows an optimal behaviour related to the need to maintain long-term average photosynthetic capacity (Vcmax) so that available environmental resources can be most efficiently used for photosynthesis. To test this hypothesis, we extend photosynthetic co-ordination theory to predict the acclimation of Rd to growth temperaturevia a link to Vcmax, and compare predictions to a global set of measurements from 112 sites spanning all terrestrial biomes. This extended co-ordination theory predicts that field-measured Rd should increase by 3.7% and Vcmax by 5.5% per degree increase in growth temperature. These acclimated responses to 50growth temperature are less steep than the corresponding instantaneous responses, which increase 8.1% and 9.9% per degree of measurement temperature for Rd and Vcmax, respectively. Data-fitted regression slopes proof indistinguishable from the values predicted by our theory, and smaller than the instantaneous slopes. Theory and data are also shown to agree that the basal rates ofboth Rd and Vcmax assessed at 25 C decline by ~ 4.4% per degree increase in growth temperature. These results provide a parsimonious general theory for Rd acclimation to temperature that is simpler – and potentially more reliable – than the plant functional type-based leaf respiration schemes currently employed in most ecosystem and land-surface models.
AU - Wang,H
AU - Atkin,OK
AU - Keenan,TF
AU - Smith,NG
AU - Wright,IJ
AU - Bloomfield,KJ
AU - Kattge,J
AU - Reich,PB
AU - Prentice,IC
DO - 10.1111/gcb.14980
EP - 2583
PY - 2020///
SN - 1354-1013
SP - 2573
TI - Acclimation of leaf respiration consistent with optimal photosynthetic capacity
T2 - Global Change Biology
UR - http://dx.doi.org/10.1111/gcb.14980
UR - https://onlinelibrary.wiley.com/doi/full/10.1111/gcb.14980
UR - http://hdl.handle.net/10044/1/76388
VL - 26
ER -