Journal
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
Volume 369, Issue 1640, Pages -Publisher
ROYAL SOC
DOI: 10.1098/rstb.2013.0223
Keywords
photosynthesis; light acclimation; state transitions; non-photochemical quenching; Chlamydomonas reinhardtii; mathematical modelling
Categories
Funding
- SystemsX.ch RTD 'Plant Growth in a Changing Environment'
- Swiss National Foundation [31003A_146300, 3100A0_117712]
- EMBO
- Royal Society [IE110263]
- French National Foundation Agency (ANR) [phytadapt ANR-NT09_567009]
- Labex GRAL (Grenoble Alliance for Integrated Structural Cell Biology) grants
- Swiss National Science Foundation (SNF) [31003A_146300] Funding Source: Swiss National Science Foundation (SNF)
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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.
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