Abstract
Photosynthetic eukaryotes house two photosystems with distinct light absorption spectra. Natural fluctuations in light quality and quantity can lead to unbalanced or excess excitation, compromising photosynthetic efficiency and causing photodamage. Consequently, these organisms have acquired several distinct adaptive mechanisms, collectively referred to as non-photochemical quenching (NPQ) of chlorophyll fluorescence, which modulates the organization and function of the photosynthetic apparatus. The ability to monitor NPQ processes fluorometrically has led to substantial progress in elucidating the underlying molecular mechanisms. However, the relative contribution of distinct NPQ mechanisms to variable light conditions in different photosynthetic eukaryotes remains unclear. Here, we present a mathematical model of the dynamic regulation of eukaryotic photosynthesis using ordinary differential equations. We demonstrate that, for Chlamydomonas, our model recapitulates the basic fluorescence features of short-term light acclimation known as state transitions and discuss how the model can be iteratively refined by comparison with physiological experiments to further our understanding of light acclimation in different species.
| Original language | English |
|---|---|
| Article number | 20130223 |
| Number of pages | 8 |
| Journal | Philosophical Transactions of the Royal Society B: Biological Sciences |
| Volume | 369 |
| Issue number | 1640 |
| DOIs | |
| Publication status | Published - 3 Mar 2014 |
Keywords
- photosynthesis
- light acclimation
- state transitions
- non-photochemical quenching
- Chlamydomonas reinhardtii
- mathematical modelling
- harvesting complex-II
- diatom phaeodactylum-tricornutum
- cytochrome BF complex
- chlamydomonas-Reinhardtii
- in-vivo
- protein-phosphorylation
- excitation-energy
- photosystem-I
- green plants
Cite this
Short-term acclimation of the photosynthetic electron transfer chain to changing light : a mathematical model. / Ebenhoeh, Oliver; Fucile, Geoffrey; Finazzi, Giovanni; Rochaix, Jean-David; Goldschmidt-Clermont, Michel.
In: Philosophical Transactions of the Royal Society B: Biological Sciences, Vol. 369, No. 1640, 20130223, 03.03.2014.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Short-term acclimation of the photosynthetic electron transfer chain to changing light
T2 - a mathematical model
AU - Ebenhoeh, Oliver
AU - Fucile, Geoffrey
AU - Finazzi, Giovanni
AU - Rochaix, Jean-David
AU - Goldschmidt-Clermont, Michel
N1 - M.G.-C. was supported by the SystemsX.ch RTD ‘Plant Growth in a Changing Environment’ and by the Swiss National Foundation (31003A_146300). O.E., G.F. and M.G.-C. benefited from the Marie Curie ITN ‘AccliPhot’ (GA 316 427). J.-D.R. acknowledges a grant from the Swiss National Foundation (3100A0_117712). G.F. was supported by an EMBO Post-Doctoral Fellowship. Mutual visits between Geneva and Aberdeen were funded by the Royal Society through the International Exchanges Grant (ref. IE110263). G.F. acknowledges funding by the French National Foundation Agency (ANR grant phytadapt ANR-NT09_567009) and the Labex GRAL (Grenoble Alliance for Integrated Structural Cell Biology) grants.
PY - 2014/3/3
Y1 - 2014/3/3
N2 - Photosynthetic eukaryotes house two photosystems with distinct light absorption spectra. Natural fluctuations in light quality and quantity can lead to unbalanced or excess excitation, compromising photosynthetic efficiency and causing photodamage. Consequently, these organisms have acquired several distinct adaptive mechanisms, collectively referred to as non-photochemical quenching (NPQ) of chlorophyll fluorescence, which modulates the organization and function of the photosynthetic apparatus. The ability to monitor NPQ processes fluorometrically has led to substantial progress in elucidating the underlying molecular mechanisms. However, the relative contribution of distinct NPQ mechanisms to variable light conditions in different photosynthetic eukaryotes remains unclear. Here, we present a mathematical model of the dynamic regulation of eukaryotic photosynthesis using ordinary differential equations. We demonstrate that, for Chlamydomonas, our model recapitulates the basic fluorescence features of short-term light acclimation known as state transitions and discuss how the model can be iteratively refined by comparison with physiological experiments to further our understanding of light acclimation in different species.
AB - Photosynthetic eukaryotes house two photosystems with distinct light absorption spectra. Natural fluctuations in light quality and quantity can lead to unbalanced or excess excitation, compromising photosynthetic efficiency and causing photodamage. Consequently, these organisms have acquired several distinct adaptive mechanisms, collectively referred to as non-photochemical quenching (NPQ) of chlorophyll fluorescence, which modulates the organization and function of the photosynthetic apparatus. The ability to monitor NPQ processes fluorometrically has led to substantial progress in elucidating the underlying molecular mechanisms. However, the relative contribution of distinct NPQ mechanisms to variable light conditions in different photosynthetic eukaryotes remains unclear. Here, we present a mathematical model of the dynamic regulation of eukaryotic photosynthesis using ordinary differential equations. We demonstrate that, for Chlamydomonas, our model recapitulates the basic fluorescence features of short-term light acclimation known as state transitions and discuss how the model can be iteratively refined by comparison with physiological experiments to further our understanding of light acclimation in different species.
KW - photosynthesis
KW - light acclimation
KW - state transitions
KW - non-photochemical quenching
KW - Chlamydomonas reinhardtii
KW - mathematical modelling
KW - harvesting complex-II
KW - diatom phaeodactylum-tricornutum
KW - cytochrome BF complex
KW - chlamydomonas-Reinhardtii
KW - in-vivo
KW - protein-phosphorylation
KW - excitation-energy
KW - photosystem-I
KW - green plants
U2 - 10.1098/rstb.2013.0223
DO - 10.1098/rstb.2013.0223
M3 - Article
VL - 369
JO - Philosophical Transactions of the Royal Society B: Biological Sciences
JF - Philosophical Transactions of the Royal Society B: Biological Sciences
SN - 0962-8436
IS - 1640
M1 - 20130223
ER -