AZ 12080282 In our simulation of the temperature stepping

In the simulation, ΔFi values are shifted downward, and ci drops significantly at the highest ΔFi. These trends are due to the fact that at low temperature, because pollen tube neglects the contribution of high-ΔFi STZs, the temperature-stepping method attributes all the recovery to lower ΔFi and thus overestimates ci for small i. By the time the highest temperature is reached, many of the STZs corresponding to i = 5 have already relaxed, leading to an underestimate of c5.