Analysis of water state in leaf by using visible, NIR and THz spectroscopy and imaging

• Project/Area Number: 26850163
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Agricultural environmental engineering/Agricultural information engineering
• Research Institution: Tohoku University
• Principal Investigator: ISHIKAWA DAITARO 東北大学, 農学研究科, 助教 (20610869)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2016: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: 水ストレス / 可視・近赤外スペクトル / イメージング / 可視・近赤外分光 / スペクトル解析

Outline of Final Research Achievements

This study presents a method for evaluating water content change in a leaf by using visible, NIR and THz spectral analysis. The spectral behaviors corresponding to the drought of water in the sample leaves were investigated. The band in the 1400-1460 nm were shifted to longer wavelength during water drought and the imaging showed the inhomogeneity of drying of leaf. Baseline shifted of THz spectra corresponded to the water contents in leaf. Thus the fundamental result of the band behavior under water stress was provided by this study, moreover water activity might enhanced the evaluation of stress by using non-descriptive methods.

Research Products

• [Presentation] Monitoring of Water Activity in the Vicinity of Meat Surface under Drying Process with NIR Spectroscopy (2016)
  • Author(s): Daitaro Ishikawa, Genjiro Ueno and Tomoyuki Fujii
  • Organizer: 20th International drying symposium
  • Place of Presentation: Nagaragawa convention center (岐阜県岐阜市)
  • Year and Date: 2016-08-07
• [Presentation] 分光分析化学的手法を用いた葉のストレス評価法に関する研究 (2015)
  • Author(s): 石川大太郎・藤井智幸
  • Organizer: 農業環境工学関連5学会2015年合同大会
  • Place of Presentation: 岩手大学(岩手県盛岡市)
  • Year and Date: 2015-09-15
• [Presentation] 分光分析化学的手法の農学分野への応用 (2015)
  • Author(s): 石川大太郎
  • Organizer: 日本分析化学会東北支部若手交流会
  • Place of Presentation: パルセいいざか(福島県福島市)
  • Year and Date: 2015-07-17
  • Invited
• [Presentation] Development of the Evaluation Method for Leaf Water Contents by using Spectroscopic Technology (2014)
  • Author(s): ISHIKAWA D., OZAKI Y. and FUJII T.
  • Organizer: FACSS2014
  • Place of Presentation: Nevada, USA
  • Year and Date: 2014-09-28 – 2014-10-03
• [Presentation] A study on Evaluation of Water Contents Change in Leaves by using Non-Destructive Method (2014)
  • Author(s): ISHIKAWA D., OZAKI Y. and FUJII T
  • Organizer: International Symposyum on Frontier of Terahertz Science
  • Place of Presentation: 沖縄科学技術大学(沖縄県国頭郡恩納村)
  • Year and Date: 2014-08-04 – 2014-08-06