Biological Effects on Perilla frutescens Seed Treated with Magnetic Field

In this research,Perilla frutescens seeds were treated by the magnetic field of 83. 5mT with different processing time. At the same time,the seed germination,seedling growth,root activity and POD activity of seedlings were investigated to provide the theoretical basis of exploring the mechanism of plant seeds with magnetic treatment. The results showed that when Perilla seeds were treated by the magnetic field for 1 to 5 hours,seed germination rate,germination energy,true leaves expansion rate,plant height,root length,root number and root activity increased at first,then decreased following with the different treatment time. Among them germination energy and true leaves expansion rate reached the significant level under 3 hours treatment,germination rate was the highest at 3 hours and reached 97. 3%,and plant height,root length and root number also reached maximum at 3 hours. When the magnetic treatment time was 3 hours,the root activity reached 0. 76TTF mg / root·h while the POD and nitrate reductase activity increased obviously after the magnetic treatment for 2 hours. From this research,it was tested that the magnetic treatment of 83. 5mT for 3 hours was the optimum treatment time to stimulate Perilla frutescens seed vigor,promote seed germination and seedling growth.