2.5. Temperature regimes
Germination and emergence experiments were conducted in incubators set at constant temperatures which ranged from 4 °C to 44 °C with 4 °C increments, under continuous darkness. All experiments were incubated over a period of 14 days (336 h). In all experiments seeds were exposed to normal light during observations. All treatments were replicated four times with 50 seeds per treatment. Replicates were arranged in a completely randomized design in controlled incubators/growth chambers. Seeds that showed signs of fungal growth were removed from the population. Germinated or emerged seeds were counted, removed and expressed as a percentage of the total number of tested seeds.