Fig. 5.

Relationship between protective NPQ (pNPQ) and actinic light intensity taken from all the data points in Figs 2A–4A where qPd >0.98. White circles represent npq1 measurements, grey are WT, and black are npq4. All results appear on approximately the same gradient (see Supplementary Fig. S2A–C at JXB online). An NPQ value of 1 can protect 100% of reaction centres up to 575 μmol m^–2 s^–1 and a value of 2 up to 1050 μmol m^–2 s^–1 (taken from Supplementary Fig. S2A–C).