Suppression of plant diseases in seedling production by LED supplementary lighting

• Project/Area Number: 24380139
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Agricultural environmental engineering
• Research Institution: Yamaguchi University
• Principal Investigator: Ibaraki Yasuomi 山口大学, 農学部, 教授 (50242160)
• Co-Investigator(Kenkyū-buntansha): ITO Shinichi 山口大学, 農学部, 教授 (30243629) ; ARAKI Hideki 山口大学, 農学部, 准教授 (90346578)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000); Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2013: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000); Fiscal Year 2012: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
• Keywords: 紫色LED / 補光 / 病害抵抗性 / 一重項酸素 / PSII量子収率 / LED補光 / クロロフィル蛍光 / 紫色光 / LED

Outline of Final Research Achievements

To develop a method to suppress plant diseases in seedling production by irradiation with violet light, a device for supplementary lighting using blue-violet LED lamps was developed and knowledge for the mechanism to induce disease resistance of plants and for optimizing lighting conditions were collected.
The obtained results suggested that blue-violet LED supplementary lighting had a potential for protection of plants from diseases in seedling production but optimization of lighting conditions was essential. In addition, the sensitivity for blue-violet LED light might depend on plant species.

Research Products

• [Journal Article] Development of an Android-tablet-based system for analyzing light intensity distribution on a plant canopy surface (2016)
  • Author(s): Miyoshi T, Ibaraki Y, Sago Y
  • Journal Title: Comput Electron Agric Volume: 122 Pages: 211-218
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 紫色LED光照射時の光化学系の励起バランスに関する基礎的研究 (2015)
  • Author(s): 増田陽介・荊木康臣
  • Journal Title: 中国・四国の農業気象 Volume: 28 Pages: 27-28
  • Acknowledgement Compliant
• [Journal Article] 人工光下の植物群落における光強度分布解析 (2015)
  • Author(s): 三好達也・荊木康臣・佐合悠貴
  • Journal Title: 中国・四国の農業気象 Volume: 28 Pages: 31-32
  • Acknowledgement Compliant
• [Journal Article] 特定波長光の付加照射がムラサキの培養効率に与える影響 (2014)
  • Author(s): 山本晃大・荊木康臣
  • Journal Title: 中国四国の農業気象 Volume: 27 Pages: 14-15
  • Acknowledgement Compliant
• [Journal Article] 405nmLED光補光時のトマト葉における光合成特性の経時変化 (2014)
  • Author(s): 森尾聡・荊木康臣・荒木英樹
  • Journal Title: 中国四国の農業気象 Volume: 27 Pages: 8-9
  • Acknowledgement Compliant
• [Journal Article] 異なるスペクトルをもつ紫色LED光照射下におけるPSII量子収率 (2014)
  • Author(s): 澤谷悠・荊木康臣
  • Journal Title: 中国四国の農業気象 Volume: 27 Pages: 54-55
  • Acknowledgement Compliant
• [Presentation] Singlet oxygen generation in tomato leaves under blue-violet LED irradiation (2016)
  • Author(s): Yosuke Masuda, Yasuomi Ibaraki
  • Organizer: International Symposium on Agricultural Meteorology (ISAM2016)
  • Place of Presentation: 岡山大学（岡山県、岡山市）
  • Year and Date: 2016-03-16
  • Int'l Joint Research
• [Presentation] ＬＥＤ補光による病害防除 (2015)
  • Author(s): 荊木康臣・伊藤真一・吉村和正
  • Organizer: 日本農業気象学会全国大会
  • Place of Presentation: つくば研究交流センター
  • Year and Date: 2015-03-17
  • Invited
• [Presentation] 405nm補光時のトマト葉の光合成特性に関する研究 (2014)
  • Author(s): 森尾聡・荊木康臣・荒木英樹
  • Organizer: 日本生物環境工学会全国大会
  • Place of Presentation: 明治大学（千代田区）
  • Year and Date: 2014-09-11
• [Presentation] Suppression of plant diseases using LED supplementary lighting (2014)
  • Author(s): Ibaraki, Y, Ito, S, Araki, H, Yoshimura, K, and Yoshioka, R
  • Organizer: 国際園芸学会ＩＨＣ2014
  • Place of Presentation: ブリスベン国際コンベンションセンター（オーストラリア）
  • Year and Date: 2014-08-16 – 2014-08-18
• [Presentation] 紫色光照射時の遠赤色光付加照射がPSII量子収率と一重項酸素の発生に与える影響 (2014)
  • Author(s): 廣中健人, 荊木康臣
  • Organizer: 日本農業気象学会全国大会
  • Place of Presentation: 北海道大学