Fig. 3
Effect of sub-zero temperatures on the freezing tolerance of four
selected accessions. Freezing tolerance of acclimated and non-acclimated
samples was evaluated by measuring electrolytic leakage after exposing
detached leaves to sub-zero temperatures. Acclimation occurred at 4°C.
The graphs show estimates of LT50 andLT100 values which are derived from a logistic
function fitted to the measured data (shown by data points). Empty
points present measured data, filled points show mean values of measured
data. Dotted lines indicate the LT50 values