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Effects of growth irradiance on de-epoxidation state of the xanthophyll cycle (A); PSII photochemical charge separation efficiency, as measured by the Chl fluorescence Fv/Fm ratio (B); Pmax of cellular photosynthesis (C); and Φ of photosynthesis (D) in WT (white circles) and zea1 mutant (squares) of D. salina.
