Effect of physical and chemical treatments on seed germination of Salvia nemarosa

Abstract

In order to assess the impact of physical and chemical treatments on dormancy and germination ability of medicinal species Salvia nemarosa, two separate experiments were conducted in a completely randomized design in five replications in laboratory of Faculty of Agriculture of Azad University of Isfahan. The treatments included: control 1 (without laser light), red laser light for 15 min, control 2 (without gibberellic acid), gibberellic acid for 24 h. After 21 days, germinated and green seeds were counted and some traits such as germination per cent, fresh weight of rootlet and plumule, dry weight of rootlet and plumule, rootlet and plumule length, the number of germinated and green seeds in 21 days were measured. The results showed that exerted treatments had significant effects on the germination per cent and measuring traits compared to control and treatment of 500 ppm gibberellic acid had the greatest impact on most of the traits. In general, it could be concluded that the impact of chemical treatments was more than physical treatment, but in terms of health and improving agricultural crops, physical treatments were more affordable and were a proper alternative for chemical treatments.