The effects of nano silver technology of germination and early growth stages on Thymus kotschyanus L.

In this research the effects of silver nanoparticles behaviors of germination and early growth stages of Thymus kotschyanus L., one invitro experiments, were conducted on CRD with four replicates during summer 2011. The silver nanoparticles treatments were consisted of as follows: 0, 20, , 60, 80 and 100 mg.kg-1 respectively. For germination test, after treating by solutions, the disinfected seeds were placed on Watman paper in Petri-dish, and were located inside the germinator at 20°C. The numbers of germinated seeds were recorded twice a day, in a 14 days period. The germination percentage, germination speed, vigor, the length of rootlet and stem, fresh weight, dry weight were determined. Results showed that the 60 mg.kg-1 of nano-silver particles had the best effect on germination percentage and speed, fresh weight and the length of rootlet in germinator condition. In addition the treated seeds with 60 mg.kg-1of silver nanoparticles showed the highest concentrations of the length of rootlet and stem in greenhouse condition. To prevent the increase of silver in soil and improvement the conditions of germination and early growth of T. kotschyanus, 60 mg.kg-1 of silver nanoparticles is recommended.