Kenichi Ogawa
Kyoto University
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Featured researches published by Kenichi Ogawa.
Planta | 1995
Takashi Ushimaru; Kenichi Ogawa; Norihiro Ishida; Mineo Shibasaka; Sumio Kanematsu; Kozi Asada; Hideo Tsuji
Changes in activities and levels of superoxide dismutase (SOD, EC 1.15.1.1) isoenzymes were studied during air adaptation of submerged rice (Oryza sativa L.) seedlings. Seeds were germinated for 6 d in the dark under water (submerged), and then for another day in air (air-adapted). For a control, seeds were germinated for 6 d throughout in air (aerobic). Staining for activity of SOD of shoot extracts showed a total of five major distinct forms of SOD: one mitochondrial Mn enzyme (mtSOD) and four CuZn enzymes, one of which was plastidic (plSOD) and the other three cytosolic (cytSOD). Activity of plSOD was much lower in submerged seedlings than in aerobic controls and increased after exposure to air. In contrast, mtSOD activity in submerged seedlings was as high as that found in aerobic controls, and did not increase upon exposure to air. One of the cytSODs showed responses similar to those of plSOD. The activities of another two cytSODs were slightly lower in submerged seedlings than those in aerobic controls, but decreased after 24 h of air adaptation. Western blot analysis revealed that these changes in activities of SODs are due to changes in the levels of their enzyme proteins. We also followed changes in the levels of cytochrome c and ferredoxin-NADP+ reductase (EC 1.6.99.4) as indices of the development of mitochondria and plastids, respectively. Organelle SODs were always present at higher levels than would be expected in view of the development of the electron-transport systems of the corresponding organelles during submergence and the subsequent air-adaptation period.
Plant and Cell Physiology | 1995
Kenichi Ogawa; Sumio Kanematsu; Keiji Takabe; Kozi Asada
Plant and Cell Physiology | 1996
Kenichi Ogawa; Sumio Kanematsu; Kozi Asada
Nihon Hōshasen Gijutsu Gakkai zasshi | 2009
Kenichi Ogawa
Nihon Hōshasen Gijutsu Gakkai zasshi | 2004
Atsuko Shiomoto; Hiroyuki Akazawa; Takashi Okada; Shinsuke Yano; Natsuo Oya; Kenichi Ogawa; Ryuichi Komatsu; Miho Morimoto; Toru Takakura
Japanese Journal of Radiological Technology | 2004
Hiroyuki Akazawa; Nobuyuki Nakamori; Atsuko Shiomoto; Shinsuke Yano; Takashi Okada; Kenichi Ogawa; Ryuuichi Komatsu; Miho Morimoto; Tooru Takakura; Yasushi Nagata; Masahiro Hiraoka
Nihon Hōshasen Gijutsu Gakkai zasshi | 2010
Kenichi Ogawa
Japanese Journal of Radiological Technology | 2001
Kenichi Ogawa; Kazuo Yoneda; Noboru Narai; Kazusi Oota; Tomomi Kamiya; Ryuzou Tanaka; Jyunichi Kinoshita; Shigeto Kawase; Masayuki Nakagawa; Yoshio Hitomi
Plant and Cell Physiology | 2000
Kenichi Ogawa; Yoshikazu Tanaka; Masaki Iwabuchi
Japanese Journal of Radiological Technology | 1996
Shigeto Kawase; Shinsuke Yano; Yutaka Yukawa; Akio Nakamori; Kenichi Ogawa; Satoshi Fukumoto; Syuuji Kawano