The effect of some treatments on seed dormancy, germination and antioxidant enzymes of Kelussia odoratissima mozaff seeds

Seed dormancy provides a mechanism for plants to delay germination until conditions are optimal for survival of the next generation. Dormancy release is regulated by a combination of environmental and endogenous signals with both synergistic and competing effects.In many cases viable seeds are called dormant when they are simply not germinating. Kelussia odoratissima mozaff is a medicinal plants of umbelliferus that dormancy. Thus shortening the dormancy and increasing germination with laboratory methods can be effective in restoring the plant. The objective of this research was to evaluate the effect different methods of breaking of dormancy on germination of kelussia odoratissima mozaff. Experiments include were stratification (۰, ۳, ۶, ۹ and ۱۲ week), stratification and gibberellin and stratification and nitrate potassium. Results showed that stratification, stratification and gibberellin and stratification and nitrate potassium increasing germination characteristics and catalase and ascorbate peroxidase activity. The highest germination percentage, seedling length, seedling dry weight and catalase and ascorbate peroxidase activity were attained from stratification and gibberellin ۵۰۰ ppm and stratification and nitrate potassium ۱%. In general Results showed stratification and gibberellic acid (۵۰۰ ppm) is the best treatment for breaking of Kelussia odoratissima mozaff seed dormancy and in seeds anti-oxidant enzymes could trigger germination.