Does the promotion of the nitrate reductase activity under blue light lead to the decrease of the nitrate content in leafy vegetables?

• Project/Area Number: 20780180
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Agricultural environmental engineering
• Research Institution: The University of Tokyo
• Principal Investigator: KANEKO Keiko The University of Tokyo, 学術研究所, 准教授 (50332599)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2008: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 生物環境調節 / 青色光 / 発光ダイオード / 硝酸 / ホウレンソウ / 品質 / レタス

Research Abstract

Blue light promotes NADH-specific nitrate reductase (NADH-NR) activity in the leaves of the spinach plants more than red light. This promotion might be caused by the increase of the nitrate content in the xylem sap. The release of nitrate from the vacuole might not relate to the promotion of NADH-NR activity. These mean that nitrate stored in the vacuole of spinach leaves was not depleted. Therefore, it was difficult to control the nitrate content of the spinach leaves by blue light irradiation.

Research Products

• [Journal Article] Low-light Irradiation at the beginning or the end of the daily dark period accelerates leaf expansion and growth in Spinacia oleracea L. (2010)
  • Author(s): Keiko Ohashi-Kaneko, Masahide Takase, Kenji Kurata
  • Journal Title: Environ.Control Biol. 48(4) Pages: 161-173
  • Peer Reviewed
• [Presentation] 人工光環境下における光質と光合成 (2010)
  • Author(s): 松田怜, 大橋(兼子)敬子
  • Organizer: 日本生物環境工学会スプリングフォーラム2010光合成:植物工場発展のキーワード
  • Place of Presentation: 東京
  • Year and Date: 2010-03-20
• [Presentation] Gas exchange characteristics and nitrogen utilization in rice and spinach leaves under blue light and red light (2009)
  • Author(s): Keiko OHASHI-KANEKO
  • Organizer: 6th International Symposium on Light in Horticulture
  • Place of Presentation: Tsukuba International Congress Center (Tsukuba)
  • Year and Date: 2009-11-19
• [Presentation] Gas Exchange Characteristics and Nitrogen Utilization in Rice and Spinach Leaves under Blue Light and Red Light (2009)
  • Author(s): Keiko Ohashi-Kaneko, R.Matsuda, M.Takase, K.Kakoi, K.Kurata
  • Organizer: 6th International Symposium on Light in Horticulture
  • Place of Presentation: Tukuba
  • Year and Date: 2009-11-18
• [Presentation] 短期的な赤色光および青色光照射下におけるイネとホウレンウの光合成ガス交換特性と窒素利用特性 (2009)
  • Author(s): 大橋(兼子)敬子
  • Organizer: 日本植物生理学会2009年年会
  • Place of Presentation: 名古屋
  • Year and Date: 2009-03-22
• [Presentation] 短期的な赤色光および青色光照射下におけるイネとホウレンソウの光合成ガス交換特性と窒素利用特性 (2009)
  • Author(s): 大橋敬子, 松田怜, 栫建二, 高瀬将英, 蔵田憲次
  • Organizer: 日本植物生理学会年会
  • Place of Presentation: 名古屋
• [Remarks] ホームページ等特になし