Department of Weed Science, Division of Phytomedicine, University of Zagreb Faculty of Agriculture, Zagreb, Croatia.
Department of Animal Nutrition, Division of Animal Science, University of Zagreb Faculty of Agriculture, Zagreb, Croatia.
PLoS One. 2024 Sep 27;19(9):e0308825. doi: 10.1371/journal.pone.0308825. eCollection 2024.
With the increasing demand for non-chemical weed control methods, phenolic acids have shown promise due to their natural weed inhibitory potential. In this study, the inhibitory effect of ferulic acid, vanillic acid and p-coumaric acid was investigated on Ambrosia artemisiifolia L. and the selectivity of Zea mays L. against these phenolic acids was tested. The seeds of A. artemisiifolia and Z. mays were treated in vitro with three phenolic acids at doses of 200-600 × 10-7 mol and in vivo foliar on A. artemisiifolia and Z. mays plants. While all phenolic acids had effects on the early growth of A. artemisiifolia, p-coumaric acid significantly reduced the length of radicle and hypocotyl by more than 60% while the effects on Z. mays were minimal. In vivo assessments using chlorophyll fluorescence and multispectral imaging showed selective stress responses in A. artemisiifolia but not in Z. mays after foliar application. The in vitro results show that p-coumaric acid is a promising compound for the control of A. artemisiifolia. However, these phenolic acids at these doses led to an insufficient reduction in photochemical efficiency. Therefore, these natural compounds need to be combined with other methods of weed control.
随着对非化学除草方法需求的增加，由于其天然的除草抑制潜力，酚酸类物质显示出了前景。本研究调查了阿魏酸、香草酸和对香豆酸对豚草属植物的抑制作用，并测试了这些酚酸类物质对玉米的选择性。用三种酚酸（浓度为 200-600×10-7mol）对豚草属植物和玉米的种子进行离体处理，对豚草属植物和玉米植株进行叶面处理。虽然所有的酚酸类物质都对豚草属植物的早期生长有影响，但对香豆酸显著降低了根和下胚轴的长度，超过 60%，而对玉米的影响则最小。体内使用叶绿素荧光和多光谱成像评估显示，叶面处理后，豚草属植物出现了选择性胁迫反应，但玉米则没有。体外研究结果表明，对香豆酸是控制豚草属植物的一种很有前途的化合物。然而，在这些剂量下，这些酚酸类物质导致光化学效率的降低不足。因此，这些天然化合物需要与其他除草方法结合使用。
