[8p-E311-1~19] 8.4 Plasma life sciences

6:00 PM - 6:15 PM JST(9:00 AM - 9:15 AM UTC)

[8p-E311-17] Distribution of Long-Lived RONS in Onion Bulbs Following Atmospheric-Pressure Air Plasma Irradiation

〇(M1C)Ryota Nakajima¹, Kensei Miki², Rie Mukai², Retsuo Kawakami¹ (1.Science and Engineering, Tokushima Univ., 2.Bioscience and Bioindustry, Tokushima Univ)

Keywords:

air plasma,onion polyphenol,RONS

In this study, the concentration distributions of long-lived reactive oxygen and nitrogen species (RONS), including NO₃^-, NO₂^-, and H₂O₂, were investigated to clarify the mechanism underlying the increase in polyphenol content in onions induced by atmospheric-pressure air plasma irradiation. The results showed that NO₃^- and H₂O₂ penetrated approximately 2-3 cm from the irradiated surface, whereas NO₂^- reached depths of approximately 3-4 cm. In addition, no significant increase in RONS concentration was observed outside the irradiation axis. The deeper penetration of NO₂^- is suggested to be due to differences in transport pathways within plant tissues.