<b>Inhibitory Effects of </b><b><i>N-trans</i></b><b>-Cinnamoyltyramine</b>

N-trans-cinnamoyltyramine (NTCT), identified from the allelopathic Vietnamese rice accession OM 5930, was studied for its effects on the growth of shoots and roots in various plant species, including weeds. Bioassays showed that NTCT strongly inhibited the growth of cress, lettuce, canola, and several weed species, including barnyardgrass and weedy rice, with higher concentrations leading to greater growth reductions. ED50 values were determined through linear regression analysis, highlighting the varying sensitivities of the species, with cress and lettuce being the most sensitive, and weedy rice showing the least sensitivity. These findings suggest that NTCT has significant potential as an eco-friendly herbicide, especially for managing herbicide-resistant weeds. Further research is needed to explore its mechanisms and field applications.本研究针对从化感越南水稻种质OM 5930中鉴定得到的反式肉桂酰酪胺（N-trans-cinnamoyltyramine, NTCT），探究了其对包括杂草在内的多种植物的地上部与根系生长的影响。生物测定结果显示，NTCT可强烈抑制水芹、莴苣、油菜以及稗草、杂草稻等多种杂草的生长，且浓度越高，生长抑制效果越显著。研究通过线性回归分析测定了各供试物种的半数有效剂量（median effective dose, ED50）值，结果表明不同物种对NTCT的敏感性存在显著差异：水芹与莴苣敏感性最高，杂草稻敏感性最低。上述研究结果表明，NTCT作为环保型除草剂具有巨大应用潜力，尤其适用于抗除草剂杂草的防控。未来仍需开展进一步研究以阐明其作用机制并推进其田间应用。