Figure 2:
Schematic illustration of a typical four-point logistic curve fitted toFv /Fm temperature
response measurement indicating the thermal tolerance variables
extracted. Indicators extracted from the fit are temperatures at which
Fv /Fm declines to 5%,
50% and 95% of the maximum Fv/Fm level expressed as T5 ,T50 and T95 , respectively.
Decline width, DW expressed as T95 –T5 .