Le Vang V, Nguyen Ay V, Luu Danh T, Fritschi Felix B, Nguyen Cuong T, Ho Thi L
College of Agriculture Can Tho University Can Tho Vietnam.
Division of Plant Science and Technology University of Missouri Columbia Missouri USA.
Plant Environ Interact. 2024 Nov 3;5(6):e70017. doi: 10.1002/pei3.70017. eCollection 2024 Dec.
-cinnamoyltyramine (NTCT) has been identified from an allelopathic Vietnamese rice accession OM 5930. This study employed bioassays to analyze NTCT's effects on shoot and root growth of multiple test and weed species. NTCT demonstrated potent inhibitory effects on cress, lettuce, canola, palmer amaranth, timothy, barnyardgrass, red sprangletop, and weedy rice, with increasing concentrations leading to substantial reductions in growth in all species. Linear regression analysis of dose response curves revealed ED values for NTCT, providing critical insights into the concentration required for 50% growth inhibition in each species. They revealed high sensitivity of the test species cress and lettuce, intermediate sensitivities of barnyardgrass, red sprangletop, timothy, and amaranth, and comparatively lower sensitivity of two weedy rice accessions. The findings underscore NTCT's efficacy in suppressing the growth of a wide range of weeds, including both grasses and broadleaf species. As such, NTCT may hold promise as a tool for sustainable weed management, particularly in addressing herbicide-resistant weeds in diverse ecological settings.
从具有化感作用的越南水稻品种OM 5930中鉴定出了对香豆酰酪胺（NTCT）。本研究采用生物测定法分析NTCT对多种试验和杂草物种地上部和根部生长的影响。NTCT对水芹、生菜、油菜、苋属植物、梯牧草、稗草、李氏禾和杂草稻表现出强烈的抑制作用，浓度增加导致所有物种的生长大幅减少。剂量反应曲线的线性回归分析揭示了NTCT的有效剂量值，为了解每种物种50%生长抑制所需的浓度提供了关键见解。结果表明，试验物种水芹和生菜敏感性高，稗草、李氏禾、梯牧草和苋属植物敏感性中等，两个杂草稻品种敏感性相对较低。这些发现强调了NTCT在抑制包括禾本科和阔叶物种在内的多种杂草生长方面的功效。因此，NTCT有望成为可持续杂草管理的工具，特别是在应对不同生态环境中的抗除草剂杂草方面。
