Figure 3.

Relationship between half-viability time (P₅₀) and τ_R for Typha pollen. Half-viability times were determined under conditions of different temperatures (5, 15, 25, 35, and 45°C) and various mcs (indicated values in g/g). Data were plotted on a double logarithmic scale {log y = a + b log x}. Mcs, constants, and correlation coefficients of the linear regressions are: ●, 0.12 g/g (a = −4.80, b = 4.41, r² = 0.943); ◊, 0.09 g/g (a = −8.39, b = 5.31, r² = 0.971); and ▴, 0.07 g/g (a = −11.32, b = 6.47, r²=0.980). Half-viability times were obtained by interpolation of previously determined data (12).