Abstract The chemical profile and phytotoxicity of the essential oil (EO) extracted from the invasive weed Solanum rostratum Dunal was investigated. GC/MS analysis led to the identification of 29 constituents, with phytol, cholesterol trimethylsilyl ether, adipic acid, bis (2-ethylhexyl) ester, and muurola-4, 10(14)‑dien‑1β-ol being abundant in the oil. Phytotoxic assay showed that the EO exhibited significant suppressive action on seed germination and seedling development of test species. Starting from 0.5 mg/mL, seed germination of test plants was significantly affected, and when the concentration reached 5 mg/mL, the EO inhibited seed germination of Poa annua, Amaranthus retroflexus and Medicago sativa by 46.78%, 93.20% and 39.22%, respectively. The EO started to affect root elongation of P. annua, M. sativa and A. retroflexus at 0.5 mg/mL by 12.12%, 18.47% and 44.63%, respectively. At the highest concentration tested, 5 mg/mL, seed germination of A. retroflexus was completely prohibited, whereas the inhibition rate of P. annua and M. sativa were 55.25% and 51.59%, respectively. Our study is the first on the chemical profile and allelopathic potential of S. rostratum EO. Combining the low yield and relatively weak activity of S. rostratum EO, we thus concluded that it is unlikely that volatile allelochemical contribute significantly to the invasion success of S. rostratum.

中文翻译：

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入侵植物 Solanum rostratum Dunal 精油的化学成分和化感作用

摘要 研究了从入侵杂草 Solanum rostratum Dunal 中提取的精油 (EO) 的化学特征和植物毒性。GC/MS 分析鉴定了 29 种成分，其中植醇、胆固醇三甲基甲硅烷基醚、己二酸、双（2-乙基己基）酯和 muurola-4、10(14)-dien-1β-ol 在油中含量丰富. 植物毒性试验表明，EO对试验物种的种子萌发和幼苗发育具有显着的抑制作用。从0.5 mg/mL开始，对受试植物种子萌发有显着影响，当浓度达到5 mg/mL时，EO对早熟禾、反枝苋和苜蓿种子萌发的抑制率分别为46.78%、93.20%和39.22%，分别。EO 在 0 时开始影响 P. annua、M. sativa 和 A. retroflexus 的根伸长。5 mg/mL 分别增加了 12.12%、18.47% 和 44.63%。在测试的最高浓度 5 mg/mL 时，A. retroflexus 的种子萌发被完全抑制，而青蒿和苜蓿的抑制率分别为 55.25% 和 51.59%。我们的研究是第一个关于 S. rostratum EO 的化学特征和化感潜力的研究。结合 S. rostratum EO 的低产量和相对较弱的活性，我们因此得出结论，挥发性化感化学物质不太可能对 S. rostratum 的入侵成功有显着贡献。我们的研究是第一个关于 S. rostratum EO 的化学特征和化感潜力的研究。结合 S. rostratum EO 的低产量和相对较弱的活性，我们因此得出结论，挥发性化感化学物质不太可能对 S. rostratum 的入侵成功有显着贡献。我们的研究是第一个关于 S. rostratum EO 的化学特征和化感潜力的研究。结合 S. rostratum EO 的低产量和相对较弱的活性，我们因此得出结论，挥发性化感化学物质不太可能对 S. rostratum 的入侵成功有显着贡献。