Assessment of allelopathic effects of residues of Flaveria bidentis (L.) Kuntze on wheat seedlings |
| |
Authors: | Feng-Juan Zhang Jian-Ying Guo Feng-xin Chen Ai-Ying Guo |
| |
Affiliation: | 1. Research Institute of Wild Plant Resources Application , Hebei Normal University of Science &2. Technology , Qinhuangdao , China;3. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection (South Campus) , Chinese Academy of Agricultural Sciences , Beijing , China;4. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection (South Campus) , Chinese Academy of Agricultural Sciences , Beijing , China;5. Technology , Qinhuangdao , China |
| |
Abstract: | Flaveria bidentis (L.) Kuntze, an invasive plant, poses a serious threat to the structure and function of the native ecosystem in Hebei Provience, China. However, little is known about the allelopathic activity of the residues of this plant species. In this study, the impact of the phytotoxicity of unburnt (UR) and burnt (BR) residues of the exotic invasive weed on the growth of wheat (Triticum aestivvm L.) was assessed. Extracts prepared from both UR and BR reduced the shoot length, root length and dry weight of wheat significantly compared with the control, thereby indicating the presence of some water-soluble allelochemicals in F. bidentis residues. Growth studies conducted in soil amended with UR and BR extracts or residues also revealed phytotoxic effects towards wheat. A significant amount of phenolics was detected in the residue extracts and in residue-incorporated soil. The phenolic content rose with increasing residue concentration, thereby showing their direct involvement in the observed growth inhibition. The inhibition of wheat growth by the burnt residue and its water extracts was similar to that of unburnt residue, so burning it is not a good way to eliminate the allelopathic effects of the residue of F. bidentis on native plants. |
| |
Keywords: | Flaveria bidentis residues wheat seedling allelopathy |
|
|