ANNALI DI BOTANICA, cilt.9, sa.1, 2019 (SCI-Expanded)
Darnel ryegrass (Lolium temulentum L.) is an annual long-day plant belonging to the Poaceae family, that is common in grain fields worldwide. L. temulentum is a valuable model grass species for studying stress in forage and turf grasses. This study was conducted to assess the impact of critical environmental factors (temperature, light, pH, and salinity) on the seed biology of L. temulentum. The findings of this study indicated that the seeds of this weed germinate after three days at temperatures between 20 degrees C and 30 degrees C, 14 days at 10 to 15 degrees C, and 28 days at 5 degrees C. Furthermore, at a temperature of 35 degrees C to 40 degrees C, the seeds did not germinate for 28 days. After 14 days, this species' most significant germination percentage was 91.6 % at 10 degrees C and 20 degrees C. Seeds did not germinate when incubated for 14 days under continuous darkness, whereas germinated at 32.5 % when subjected to light for 12 h daily. Also, the results showed no significant effect of examined pH (4-10) and salinity (0, 25, 50, 100, 150, 200, and 250) levels on seed germination of L. temulentum. The information gained from the analysis will provide a valuable biological plant germination resource that will be used to develop approaches as to how the plant can improve under abiotic stress factors.