Identification of allelochemical in fallen leaves of Hemalayan Cedar

2015 Fiscal Year Final Research Report

• Project/Area Number: 25450029
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Crop production science
• Research Institution: National Institute for Agro-Environmental Sciences
• Principal Investigator: KAMO Tsunashi 国立研究開発法人 農業環境技術研究所, 生物多様性研究領域, 主任研究員 (60345759)
• Co-Investigator(Kenkyū-buntansha): HIRADATE Syuntaro 国立研究開発法人農業環境技術研究所, 生物多様性研究領域, 上席研究員 (60354099) ; TODOROKI Yasushi 静岡大学, (連合)農学研究科(研究院), 教授 (30324338)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: アレロパシー / アブシジン酸

Outline of Final Research Achievements

Fallen leaves of Hemalayan Cedar inhibit the growth of neiboring plants. We elucidated the chemical structure of the active compound and evaluated its plant growth activity in soils. By spectral analyses, it was idetified as abscisic acid. It showed the activity in the presence of volcanic ash soil, alluvial soil, or calcareous soil. This compound was hardly absorbed by soils, which could be attributed to stereochemical factors rather than the degree of polarity. We quantified the amount of fallen leaves throughout the seasons and confirmed that they reached the maximum between spring and summer. The concentration of abscisic acid in fresh fallen leaves was also the largest in these seasons. These observations implied that abscisic acid might play a role in weed growth inhibition in the field.

Free Research Field

天然物化学