Mutation of a stromal C-terminal threonine residue of Photosystem II subunit S slows down NPQ induction and speeds up relaxation.
In order to prevent damage by excess light, light harvesting antennae can switch to an energy dissipative mode (termed non-photochemical quenching, NPQ). In higher plants, this switch is facilitated by the presence of Photosystem II subunit S (PsbS) protein, which was discovered 25 years ago. While the role of PsbS in...