Figure 4:Relationships between PS II maximum quantum yield (F_v /F_m ) breakpoint temperature, T₅ , and decline width, the temperature window of F_v /F_m declines from 95% to 5% of the maximum F_v/F_m level (T₉₅ – T₉₅ ). A) Evergreen trees from Nova Xavantina measured during end of dry and wet seasons and B) Extended analysis using data from an unpublished study from a Cerradão (savannah forest) site in Nova Xavantina (wet season) combined with data from Panama sampled during wet season reanalyzed from data published by Slot et al. (2018) [Error bars in panel A: seasonal variation whereas panel B, variation across individual tree replicates]