School of Biological Sciences and Biotechnology, College of Natural and Computational Sciences, Haramaya University, Haramaya, P.O. Box 138, Ethiopia.
ScientificWorldJournal. 2023 May 13;2023:6663686. doi: 10.1155/2023/6663686. eCollection 2023.
is a noxious invasive plant that invades agricultural and natural ecosystems. In the current study, phytotoxicity of hexane and ethanolic leaf extracts of in different concentrations and soils invaded by it on were investigated under laboratory conditions. Soil toxicity was evaluated by comparing the growth of on soils sampled from -invaded and -free sites. Results showed that extract concentrations and solvent type and their interaction significantly reduced percent seed germination and seedling growth. Compared to control (distilled water), both hexane and ethanol extracts at 5% w/v concentration significantly reduced percent germination and early seedling growth and completely inhibited seed germination at 10% w/v of hexane leaf extract, suggesting that hexane extract has a greater inhibitory effect than ethanolic extract in all the parameters measured. However, growth performance and seed yield of grown on soil invaded by did not significantly vary from those grown on soils sampled from noninvaded sites. The results of this study generally showed that though leaf extracts have a direct negative allelopathic effect on , soils invaded by have no toxic materials in the soil to directly or indirectly inhibit the growth of . Further field studies on allelopathic effects of on are recommended.
是一种有害的入侵植物，会入侵农业和自然生态系统。在当前的研究中，在实验室条件下研究了不同浓度的正己烷和乙醇叶片提取物以及受其入侵的土壤对 的植物毒性。通过比较从受入侵和未受入侵地点采集的土壤中 的生长情况来评估土壤毒性。结果表明，提取物浓度、溶剂类型及其相互作用显著降低了种子的发芽率和幼苗生长。与对照（蒸馏水）相比，在 5%w/v 浓度下，正己烷和乙醇提取物均显著降低了发芽率和早期幼苗生长，在 10%w/v 正己烷叶提取物中完全抑制了种子发芽，表明正己烷提取物在所有测量参数中比乙醇提取物具有更大的抑制作用。然而，在受入侵土壤上生长的 的生长表现和种子产量与在未受入侵地点采集的土壤上生长的 没有显著差异。本研究的结果表明，尽管 叶片提取物对 具有直接的负化感作用，但受 入侵的土壤中没有有毒物质直接或间接抑制 的生长。建议进一步开展关于 对 的化感作用的田间研究。
