Non-photochemical quenching (NPQ) of aureo1a-15 (grey triangles) and aureo1a-50 (white circles) P. tricornutum cultures depending on the incident light intensity in the measuring cuvette; corresponding WT data of Schellenberger Costa et al.
 (black squares) are included for better comparison. Algae were cultivated at a QPhar of 10 µmol absorbed photons m−2 s−1 (LL) under illumination with blue (A) and red light (B) and further at a QPhar of 30 µmol absorbed photons m−2 s−1 (ML) under illumination with blue (C) and red light (D). Mean values are shown with standard deviation (n = 9). The maximum NPQ of each culture condition was tested for the occurrence of significant differences between WT and aureochrome 1a silenced using a one-way ANOVA followed by a Holms-Sidak pair-wise comparison test with the WT as control group. Significant differences are marked with asterisks (p<0.05).