Relationship between NPQ and CEF
We determined whether high CEF was associated with a stronger capacity for NPQ (Figure 6). All UWO 241 cultures exhibited faster rates of P700+ re-reduction and higher maximum NPQ levels relative to SAG 49.72. A strong negative correlation was observed between NPQ capacity and P700+ re-reduction rate within either the dataset across all experiments or within UWO 241 samples (r 2 = 0.93 and 0.99, respectively). In contrast, SAG 49.72 exhibited a weak positive correlation between NPQ and P700+ re-reduction rate (r 2 = 0.52).