Allelopathic effects of parthenin against two weedy species,Avena fatua and Bidens pilosa |
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| Institution: | 1. Department of Chemistry, National Central University, Chung-Li 32054, Taiwan, ROC;2. Department of Fuel Cell Materials and Advanced Capacitors, Division of Energy Storage Materials and Technology, Material and Chemical Laboratories, Industrial Technology Research Institute, Hsin-Chu 300, Taiwan, ROC;1. Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, Jiangsu 210037, China;2. College of Biology and the Environment, Nanjing Forestry University, Nanjing, Jiangsu 210037, China;3. Department of Botany, Smithsonian Institution, Washington, DC 20013, USA;4. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China;5. Environmental Futures Research Institute, Griffith University, Nathan, Brisbane 4111, Australia;6. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210046, China;7. Soil and Water Science Department, University of Florida, Gainesville, FL 32611, USA |
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| Abstract: | Parthenin is a natural constituent of Parthenium hysterophorus with phytotoxic and allelopathic properties. Its effect on two weedy species viz. Avena fatua and Bidens pilosa was studied with a view to explore its herbicidal potential. Germination of both the weeds was reduced with increasing concentration of parthenin and a dose-response relationship was observed. This provided information on LC50 and Inhibition threshold concentrations of parthenin that could be useful for future studies. Further, parthenin also inhibited the growth of both the weeds in terms of root and shoot length and seedling dry weight. Inhibition of root growth was greater than that of shoot growth. Similar observations were made when the test weeds were grown in soil amended with different concentrations of parthenin. In addition to growth, there was a reduction of chlorophyll content in the growing seedlings. It also caused water loss in the weedy species. The study, therefore, reveals that parthenin exerts an inhibitory effect on the growth and development of both weeds and can be further explored as a herbicide for future weed management strategies. |
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