Initial responses to dark-light shift compared to light intensity shift.

Molecular, metabolic and physiological responses after a shift from prolonged darkness (D48) to white light (WL 0.5 h; 100 µmol m−2 s−1) compared to a shift from low light (LL 0.5 h; 35 µmol m−2 s−1) to high light (HL 0.5 h; 500 µmol m−2 s−1) [28].Plus (+) and minus (÷) symbols indicate an increase or decrease in WL (0.5 h) compared to DT48, or HL (0.5 h) compared to LL levels. The abbreviations used are NC: no change; ND: not detected; LHC: light-harvesting complex; PSII: photosystem II; Chl: chlorophyll; Diadino: diadinoxanthin; Diato: Diatoxanthin; ΦPSII_max: maximum quantum yield of charge separation in PSII; rETRmax: maximum relative electron transport rate; α: the slope of the photosynthesis versus irradiance curve.