Impact evaluation of UV-B radiation toward plants based on the nondestructive epidermal optical transmittance measurement of leaves.

2016 Fiscal Year Final Research Report

• Project/Area Number: 26340054
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental impact assessment
• Research Institution: Kisarazu National College of Technology
• Principal Investigator: FUKUCHI Ken'ichi 木更津工業高等専門学校, 基礎学系, 教授 (00218942)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ラッカセイ葉 / 樹木葉 / 表皮の分光透過率 / UV-Bストレス / 蛍光スペクトル / 蛍光画像 / クロロフィル蛍光 / 葉内色素変化

Outline of Final Research Achievements

We developed a device to measure fluorescence spectra and images simultaneously excited by multiple wavelength (300 - 400 nm), and were successful in analyzing epidermal optical transmittance and fluorescence distribution in leaves nondestructively.
Ultraviolet-B irradiation to a peanut leaf caused optical holes on the leaf surface so that the transmittance in ultraviolet region increased exponentially. It’s shown that the monitor of the transmittance is extremely effective for the early detection and the quantitative evaluation of the UV-B impact to the plant leaves. Besides, seasonal variation of chlorophyll contents, anthocyanin contents and the epidermal transmittance were investigated in 30 kinds of trees. The results are that the epidermal transmittance characteristics of tree leaves differ according to both the species and the season, and are closely related to the photosynthesis activity and the pigments of leaves.

Free Research Field

光応用計測，環境影響評価