Energy-dependent quenching adjusts the excitation diffusion length to regulate photosynthetic light harvesting
Open Access
- 20 September 2018
- journal article
- research article
- Published by National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 115 (41) , E9523-E9531
Abstract
Significance: Plants’ photosynthetic mechanism adjusts to fluctuations in light intensity. Intermittent bright sunlight can damage light-harvesting proteins; to preempt this, plants dissipate excess absorbed excitation energy as heat. Energy-dependent quenching (qE) of excitations occurs on the seconds to minutes timescale through conformational changes in antenna proteins. Using a multiscale model of photosystem II, we show that changes in light harvesting due to qE can be explained using a single parameter, the excitation diffusion length, which decreases as qE activates. These findings have implications for the interpretation of pulse amplitude-modulated fluorescence, a common noninvasive measurement of photosynthetic activity in leaves.Keywords
All Related Versions
Funding Information
- U.S. Department of Energy (DE-SC0001088)
- U.S. Department of Energy (DE-AC02-05CH11231)
- Canadian Institute for Advanced Research (BioInspired Solar Energy Program)
- U.S. Department of Energy (DEAC03-76SF000098)
- U.S. Department of Energy (DE-AC02-05CH11231)
This publication has 48 references indexed in Scilit:
- Models and measurements of energy-dependent quenchingPhotosynthesis Research, 2013
- Controlled Disorder in Plant Light-Harvesting Complex II Explains Its Photoprotective RoleBiophysical Journal, 2012
- Intra- and inter-monomeric transfers in the light harvesting LHCII complex: the Redfield–Förster picturePhysical Chemistry Chemical Physics, 2011
- Effect of Antenna-Depletion in Photosystem II on Excitation Energy Transfer in Arabidopsis thalianaBiophysical Journal, 2010
- Functional architecture of higher plant photosystem II supercomplexesThe EMBO Journal, 2009
- Lutein Can Act as a Switchable Charge Transfer Quencher in the CP26 Light-harvesting ComplexJournal of Biological Chemistry, 2009
- Far‐red fluorescence: A direct spectroscopic marker for LHCII oligomer formation in non‐photochemical quenchingFEBS Letters, 2008
- Chlorophyll Fluorescence: A Probe of Photosynthesis In VivoAnnual Review of Plant Biology, 2008
- Crystal structure of spinach major light-harvesting complex at 2.72 Å resolutionNature, 2004
- Theory on Rates of Excitation-Energy Transfer between Molecular Aggregates through Distributed Transition Dipoles with Application to the Antenna System in Bacterial PhotosynthesisThe Journal of Physical Chemistry B, 1998