ArticlePhotosynthesis research2026
Exciton structure of LHCII antenna revisited: complex time-dependent Redfield approach.
Article in Photosynthesis research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
We develop the exciton model of the major light-harvesting complex LHCII from higher plants based on complex time-dependent Redfield (ctR) theory. A simultaneous quantitative fit of the absorption, linear dichroism, and fluorescence spectra allowed us to obtain the site energies of 14 chlorophylls (Chl) within monomeric subunit of the trimeric LHCII antenna. These site energies are noticeably different from those defined in the former exciton model of the complex based on modified Redfield (mR) theory. At the same time there are similarities in distribution of the pigment participations to the exciton states in the ctR and mR models. In both models the blue-most is the Chl b606 site, the Chl a604 pigment is a long-lived intermediate peaking between the Chls b and Chls a bands, and the red-most trap is located at Chl a610. We suggest that the site energies and other parameters emerging from the present ctR model should be used in order to get more realistic (comparing to mR) treatment of the spectra and excitation dynamics in LHCII antenna.
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