title: Effects of plasma irradiation using various feeding gases on growth of Raphanus sativus L.
abstract: In this work, we have studied the action of dielectric barrier discharge (DBD) plasma irradiation using various feeding gases on seeds of Raphanus sativus L. and analysis their growth. Our experimental data shows that Air, O2, and NO(10%)+N2 feeding gases plasma irradiation enhanced plant growth, whereas N2, He and Ar feeding gases plasma irradiation had little influence on plant growth. Moreover, humid air plasma irradiation was more effective in growth enhancement than dry one. More than 2.3 times faster growth was observed by 3 min air plasma irradiation with 40-90% relative humidity. The reactive species generated by plasma in gas phase were detected using optical emission spectroscopy and in liquid phase by electron spin resonance (ESR) spectroscopy. We concluded that OH and O radicals were key species for plant growth enhancement.
authors.affiliation: Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
authors.forename: Thapanut
authors.initials: T
authors.lastname: Sarinont
authors.affiliation: Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
authors.forename: Takaaki
authors.initials: T
authors.lastname: Amano
authors.affiliation: Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; Plasma Bioscience Research Center/Department of Electrical and Biological Physics, Kwangwoon University, Seoul 139-701, South Korea.
authors.forename: Pankaj
authors.initials: P
authors.lastname: Attri
authors.affiliation: Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
authors.forename: Kazunori
authors.initials: K
authors.lastname: Koga
authors.affiliation: Interdisciplinary Graduate School of Engineering Science, Kyushu University, 6-1 Kasuga-kouen, Fukuoka 816-8580, Japan.
authors.forename: Nobuya
authors.initials: N
authors.lastname: Hayashi
authors.affiliation: Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan. Electronic address: siratani@ed.kyushu-u.ac.jp.
authors.forename: Masaharu
authors.initials: M
authors.lastname: Shiratani
mesh_terms: D000388:Air; D004574:Electromagnetic Fields; D004578:Electron Spin Resonance Spectroscopy; D006813:Humidity; D017665:Hydroxyl Radical / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D058626:Plasma Gases; D031224:Raphanus / Q000254:growth & development*; D017382:Reactive Oxygen Species / Q000737:chemistry; D012639:Seeds / Q000254:growth & development*
chemical_list: D058626:Plasma Gases; D017382:Reactive Oxygen Species; D017665:Hydroxyl Radical; D009584:Nitrogen; D010100:Oxygen
keywords: Gas fumigation; Humidity; Plant growth enhancement; Plasma; Radish sprout; Raphanus sativus L.; Seed