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. 2019 May 31;10:609. doi: 10.3389/fpls.2019.00609

FIGURE 8.

FIGURE 8

Images of chlorophyll fluorescence parameters made in leaves of S. capitata exposed to different levels of atmospheric [CO2] and temperature at maximum PPFD (784 μmol photons m-2 s-1). (A–D) Coefficient of photochemical quenching (lake model) (qL). (E–H) Coefficient of photochemical quenching (puddle model) (qP). (I–L) Effective PSII quantum yield Y(II). (M–P) Quantum yield of non-regulated energy dissipation Y(NO). (Q–T) Quantum yield of regulated energy dissipation Y(NPQ). Measurement was performed at 66th day of experiment. [CO2] levels: ambient (aCO2) and elevated (eCO2, 600 μmol mol-1). Temperature levels: ambient (aT) and elevated (eT, +2°C above ambient canopy temperature). Different letters in the same row indicate statistical differences between treatments determined by t-test. Relative values of each parameter in the images have been mapped to a color palette ranging from 0 to 1 and displayed using an identical false color scale (bar is at the bottom of image).