A kinetic model of rapidly reversible nonphotochemical quenching
作者： J. Zaks , K. Amarnath , D. M. Kramer , K. K. Niyogi , G. R. Fleming
关键词:
摘要: Oxygen-evolving photosynthetic organisms possess nonphotochemical quenching (NPQ) pathways that protect against photo-induced damage. The majority of NPQ in plants is regulated on a rapid timescale by changes the pH thylakoid lumen. In order to quantify rapidly reversible component NPQ, called qE, we developed mathematical model pH-dependent chlorophyll excitations Photosystem II. Our expression for qE depends protonation PsbS and deepoxidation violaxanthin deepoxidase. able simulate kinetics at low high light intensities. simulations suggest lumen, which activates not itself affected qE. provides framework testing hypothesized mechanisms assessing role improving plant fitness variable intensity.
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