AVS 64th International Symposium & Exhibition
    Plasma Processing for Biomedical Applications Focus Topic Monday Sessions
       Session PB+BI+PS-MoA

Invited Paper PB+BI+PS-MoA1
Control for Plant Disease and Development by Atmospheric Pressure Plasma

Monday, October 30, 2017, 1:40 pm, Room 12

Session: Plasma Agriculture & Processing of Biomaterials
Presenter: Gyungsoon Park, Kwangwoon University, Republic of Korea
Correspondent: Click to Email
Previously, we observed that seeds contaminated with Fusarium fujikuroi (a fungus causing rice bakanae disease) were more effectively disinfected in water by arc discharge plasma than ozone. Efficiency of disinfection was decreased when the distance between seeds and electrodes becomes greater. This indicates that shockwave from arc plasma may play an important role in seed sterilization, and we measured about 50-60 atm shockwave pressure. In addition, seed surface became more hydrophillic after plasma than ozone treatment indicating that water containing ROS and RNS can more easily get inside hull. Ozone level in water was decreased when seeds were present. This is probably due to the chemical reaction of ozone with seed surface molecules and will eventually cause the decrease in efficiency of seed disinfection. We also analyzed the effect of water and buffer treated with microwave plasma generated gas containing nitric oxide (PGNO) on development of spinach. The real time level of nitric oxide in water and phosphate buffer was increased to about 100 µM after treatment with PGNO for 50 min. Spinach treated with PGNO water seems to become more tolerant to drought stress. Our work was supported by the National Research Foundation of Korea (NRF) grant (No. 2010-0027963), Rural Development Administration (RDA) grant (No. PJ009891) and National Fusion Research Institute (NFRI) grant.