Impact of salinity and temperature on dimorphic seed germination of Panlcum turgldum

摘要

Panicum turgidum Forssk is a dominant perennial grass in the dry rangelands of Saudi Arabia. It has been reported to grow well in non-saline flat areas (Al-Khateeb 2006).Grasses germinate well in NaCI concentration up to 200 mM (Perez et al 1998). Salinity and temperature have differential effects on seed germination (Khan et al 2003). Seed dimorphism or polymorphism is of selective advantage. It may be allowed to escapefrom negative effects of salinity (Khan et al 1998)