| Autor: |
Sothearith Y; Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwai-cho 3-5-8, Fuchu 183-8509, Tokyo, Japan.; Ministry of Environment, Morodok Techcho (Lot 503) Tonle Bassac, Chamkarmorn, Phnom Penh 120101, Cambodia., Appiah KS; Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwai-cho 3-5-8, Fuchu 183-8509, Tokyo, Japan.; Department of Crop Science, University of Ghana, Legon, Accra P.O. Box LG 44, Ghana., Sophea C; Ministry of Environment, Morodok Techcho (Lot 503) Tonle Bassac, Chamkarmorn, Phnom Penh 120101, Cambodia.; Centre for Biodiversity Conservation, Royal University of Phnom Penh, Russian Federation Boulevard, Toul Kork, Phnom Penh 120404, Cambodia., Smith J; Forest Research Institute, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia., Samal S; Ministry of Environment, Morodok Techcho (Lot 503) Tonle Bassac, Chamkarmorn, Phnom Penh 120101, Cambodia.; Ministry of Land Management, Urban and Construction, Lot 2005, Street 307, Sangkat Khmuonh, Khan Sen Sok, Phnom Penh 120803, Cambodia., Motobayashi T; Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwai-cho 3-5-8, Fuchu 183-8509, Tokyo, Japan., Fujii Y; Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwai-cho 3-5-8, Fuchu 183-8509, Tokyo, Japan. |
| Abstrakt: |
Iris pallida Lam., also known as Sweetie Iris, is a perennial ornamental and medicinal plant that produces a wide range of secondary metabolites. The Sweetie Iris was recently reported to have high allelopathic properties with the potential to be explored in sustainable weed management. This study aimed to identify and evaluate the contributions of compounds involved in the inhibitory effects of the rhizome of Sweetie Iris. High-performance liquid chromatography (HPLC) analysis was used to determine the content of β -ionone in the rhizome of Sweetie Iris. The phytotoxicity of β -ionone was evaluated on lettuce ( Lactuca sativa L.) and other test plants. The content of β -ionone in the crude extract of Sweetie Iris rhizome was found to be 20.0 mg g -1 by HPLC analysis. The phytotoxicity bioassay showed that β -ionone had strong inhibitory activity on the growth of lettuce ( Lactuca sativa L.) and the other test plants, including Taraxacum officinale , Stellaria media , Eleusine indica , Amaranthus hybridus , Vicia villosa, and Brassica napus . At a concentration of 23.0 µg mL -1 , β -ionone inhibited the growth of all test plant species treated. Therefore, β -ionone is an active compound among the other allelopathic substances contained in the rhizome of Sweetie Iris. |
