A theoretical investigation of the photophysical consequences of major plant light-harvesting complex aggregation within the photosynthetic membrane.
Spectroscopic measurements of Arabidopsis leaves have shown that the energy-dependent component of non-photochemical quenching (NPQ), known as qE, is associated with an absorption change at 535 nm (ΔA(535)). Identical measurements on the zeaxanthin-deficient mutant npq1 reveal a similar spectroscopic signature at 525 nm (ΔA(525)). We investigated whether these red-shifts may arise from excitonic interactions among homodimers of xanthophylls, zeaxanthin, and violaxanthin, bound at the peripher...Expand abstract
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