A model of plant isoprene emission based on available reducing power captures responses to atmospheric CO2
File(s)
Accepted version
Supporting information
Author(s)
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.
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.
Date Issued
2014-07-01
Date Acceptance
2014-03-01
Citation
New Phytologist, 2014, 203 (1), pp.125-139
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.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000336970200015&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
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
Publication Status
Published
Date Publish Online
2014-03-24