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. 2017 Mar 15;8:404. doi: 10.3389/fmicb.2017.00404

FIGURE 1.

FIGURE 1

Dynamics of NPQ (non-photochemical quenching) under contrasting light and P (phosphorus) conditions in Karlodinium veneficum. The dark-adapted algal cells were exposed to actinic light for 10 min to induce the NPQ and then the actinic light was turned off for another 10 min. Fm’ was measured at the end of each minute. (A) Induction and relaxation of NPQ of K. veneficum cells exposed to different actinic light intensities. Open triangles, actinic light of 50 μmol photons m-2 s-1; open squares, actinic light of 200 μmol photons m-2 s-1; closed squares, actinic light of 300 μmol photons m-2 s-1; closed triangles, actinic light of 600 μmol photons m-2 s-1. (B) Induction and relaxation of NPQ of K. veneficum cells grown under +P and –P conditions and an actinic light intensity of 700 μmol photons m-2 s-1. Closed circles, P-replete condition; open circles, P-depleted condition. Data shown are means ± SD (error bars) from the triplicated measurements.