Allelopathic Potential and Active Substances from Wedelia Chinensis (Osbeck)
Kawsar Hossen1,2, Krishna Rany Das1,2,3, Shun Okada1,2
1Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki, Kagawa 761-0795, Japan.
Foods (Basel, Switzerland)
|November 5, 2020
Summary
Wedelia chinensis exhibits phytotoxic effects on various plant species. Vanillic acid and gallic acid were identified as the key compounds responsible for this growth inhibition.
Area of Science:
- Plant Science
- Biochemistry
- Ecology
Background:
- Wedelia chinensis is a medicinal plant with known pharmaceutical properties.
- Its phytotoxic potential and allelopathic effects have not been previously investigated.
- Understanding allelopathy is crucial for agricultural and ecological management.
Purpose of the Study:
- To investigate the allelopathic effects of Wedelia chinensis.
- To identify the specific phytotoxic substances produced by the plant.
- To determine the impact of these substances on the growth of various plant species.
Main Methods:
- Extraction and purification of compounds from Wedelia chinensis.
- Allelopathic assays using extracts on multiple plant species (cress, alfalfa, rapeseed, etc.).
- Isolation and spectral analysis to identify phytotoxic compounds, including vanillic acid and gallic acid.
Main Results:
- Wedelia chinensis extracts demonstrated significant inhibitory activity on root and shoot growth across tested species.
- Vanillic acid and gallic acid were isolated and identified as the primary phytotoxic agents.
- Specific inhibitory concentrations (I50 values) for vanillic acid and gallic acid on cress and Italian ryegrass were determined.
Conclusions:
- Vanillic acid and gallic acid are the principal compounds mediating the phytotoxic effects of Wedelia chinensis.
- These findings contribute to understanding plant-plant interactions and the ecological role of Wedelia chinensis.
- The identified compounds may have implications for weed management strategies.
