A model of plant isoprene emission based on available reducing power captures responses to atmospheric CO2

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Title: A model of plant isoprene emission based on available reducing power captures responses to atmospheric CO2
Authors: Morfopoulos, C
Sperlich, D
Penuelas, J
Filella, I
Llusia, J
Medlyn, BE
Niinemets, U
Possell, M
Sun, Z
Prentice, IC
Item Type: Journal Article
Abstract: We present a unifying model for isoprene emission by photosynthesizing leaves based on the hypothesis that isoprene biosynthesis depends on a balance between the supply of photosynthetic reducing power and the demands of carbon fixation. We compared the predictions from our model, as well as from two other widely used models, with measurements of isoprene emission from leaves of Populus nigra and hybrid aspen (Populus tremula × P. tremuloides) in response to changes in leaf internal CO2 concentration (Ci) and photosynthetic photon flux density (PPFD) under diverse ambient CO2 concentrations (Ca). Our model reproduces the observed changes in isoprene emissions with Ci and PPFD, and also reproduces the tendency for the fraction of fixed carbon allocated to isoprene to increase with increasing PPFD. It also provides a simple mechanism for the previously unexplained decrease in the quantum efficiency of isoprene emission with increasing Ca. Experimental and modelled results support our hypothesis. Our model can reproduce the key features of the observations and has the potential to improve process‐based modelling of isoprene emissions by land vegetation at the ecosystem and global scales.
Issue Date: 1-Jul-2014
Date of Acceptance: 1-Mar-2014
URI: http://hdl.handle.net/10044/1/70436
DOI: https://doi.org/10.1111/nph.12770
ISSN: 0028-646X
Publisher: Wiley
Start Page: 125
End Page: 139
Journal / Book Title: New Phytologist
Volume: 203
Issue: 1
Copyright Statement: © 2014 Owner. This is the accepted version of the following article: Morfopoulos, C. , Sperlich, D. , Peñuelas, J. , Filella, I. , Llusià, J. , Medlyn, B. E., Niinemets, Ü. , Possell, M. , Sun, Z. and Prentice, I. C. (2014), A model of plant isoprene emission based on available reducing power captures responses to atmospheric CO2. New Phytol, 203: 125-139. doi:10.1111/nph.12770, which has been published in final form at https://doi.org/10.1111/nph.12770.
Keywords: Science & Technology
Life Sciences & Biomedicine
Plant Sciences
black poplar (Populus nigra)
hybrid aspen (Populus tremula x P. tremuloides)
isoprene emission
light response
modelling
photosynthetic electron transport
quantum yield
volatile compounds
ASPEN LEAVES
HYBRID ASPEN
IN-VIVO
TROPOSPHERIC CHEMISTRY
VOLATILE ISOPRENOIDS
TEMPERATURE RESPONSE
SYNTHASE ACTIVITY
RATE VARIABILITY
CARBON-DIOXIDE
CLIMATE-CHANGE
black poplar (Populus nigra)
hybrid aspen (Populus tremula × P. tremuloides)
isoprene emission
light response
modelling
photosynthetic electron transport
quantum yield
volatile compounds
Butadienes
Carbon
Carbon Dioxide
Hemiterpenes
Models, Biological
Pentanes
Photosynthesis
Plant Leaves
Populus
Populus
Plant Leaves
Carbon Dioxide
Carbon
Pentanes
Butadienes
Hemiterpenes
Photosynthesis
Models, Biological
Science & Technology
Life Sciences & Biomedicine
Plant Sciences
black poplar (Populus nigra)
hybrid aspen (Populus tremula x P. tremuloides)
isoprene emission
light response
modelling
photosynthetic electron transport
quantum yield
volatile compounds
ASPEN LEAVES
HYBRID ASPEN
IN-VIVO
TROPOSPHERIC CHEMISTRY
VOLATILE ISOPRENOIDS
TEMPERATURE RESPONSE
SYNTHASE ACTIVITY
RATE VARIABILITY
CARBON-DIOXIDE
CLIMATE-CHANGE
Plant Biology & Botany
06 Biological Sciences
07 Agricultural and Veterinary Sciences
Publication Status: Published
Online Publication Date: 2014-03-24
Appears in Collections:Department of Life Sciences



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