A study of the regeneration from stem fragments of an invasive species, Alternanthera philoxeroides, development of its extermination methods, and utilization as a fertilizer

2018 Fiscal Year Final Research Report

• Project/Area Number: 15K14672
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Plant protection science
• Research Institution: Toho University
• Principal Investigator: TAKAHASHI Hidenori 東邦大学, 理学部, 准教授 (70318210)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Keywords: ナガエツルノゲイトウ / 特定外来生物

Outline of Final Research Achievements

Alternanthera philoxeroides regenerated shoots and roots from not only its stem fragments but also its root fragments. Hormonal control of shoot development from stem fragments resembles that from normal plant bodies. Regeneration of shoot needed light, indicating that sheet-shading is useful for the extermination of A. philoxeroides. Furthermore, N-(Phosphonomethyl)glycine 2-propylamine lowered the photosynthesis activity and chlorophyll content, and suppressed the shoot regeneration from stem fragments.

Free Research Field

植物生理学

Academic Significance and Societal Importance of the Research Achievements

特定外来生物のナガエツルノゲイトウは回収駆除の過程で断片化して流失し、芽・根を発生させ、漂着先で個体群を形成する。こうして河川や水田等で繁殖域を広げ、世界中で生態系・農水産業に悪影響を与えている。茎断片からの個体再生の仕組みの一端を解明し、遮光シート法とN-(Phosphonomethyl)glycine 2-propylamineの効果も証明できたことは、効果的駆除方法の普及と開発につながり、社会的意義が大きい。一方、茎断片からの個体再生は栄養繁殖の一例でもあり、その仕組みの解明には学術的意義もある。