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Kinetics of deepoxidation in P. tricornutum in HL1 (700 μmol m−2⋅s−1) after 6-h HL1 followed by 45-min LL. Pigments are normalized to Chl a because during 30-min HL1, no increase in Chl a occurred. (A) Deepoxidation of Ddx to Dtx; (B) deepoxidation of Vx via Ax to Zx. Solid lines represent fit to monoexponential decay; dashed lines were calculated assuming stoichiometric conversion between pigments of the corresponding xanthophyll cycle.
