Zabalza Ana, Zulet-González Ainhoa, Barco-Antoñanzas Maria, Eceiza Mikel V, Gil-Monreal Miriam, Royuela Mercedes
Institute for Multidisciplinary Research in Applied Biology (IMAB), Universidad Pública de Navarra, Campus Arrosadia s/n, 31006 Pamplona, Spain.
Plants (Basel). 2020 Sep 16;9(9):1215. doi: 10.3390/plants9091215.
Quinate (1,3,4,5-tetrahydroxycyclohexanecarboxylate) is a compound synthesized in plants through a side-branch of the shikimate biosynthesis pathway, which is accumulated after glyphosate and acetolactate synthase inhibiting herbicides (ALS-inhibitors) and has phytotoxic potential. The objective of this study was to evaluate the phytotoxicity of quinate on several weed species. Among the species evaluated, , , , , and , was the most sensitive, and its growth was controlled with quinate concentrations above 100 mM at the phenological stage of 6-8 true leaves. A physiological study, including the shikimate pathway and the physiological markers of ALS-inhibitors (carbohydrates and amino acids), was performed in the sensitive and resistant plants treated with sulfonylureas or quinate. The typical physiological effects of ALS-inhibitors were detected in the sensitive population (free amino acid and carbohydrate accumulation) and not detected in the resistant population. The mode of action of quinate appeared to be related to general perturbations in their carbon/nitrogen metabolism rather than to specific changes in the shikimate pathway. These results suggest the possibility of using quinate in the weed control management of .
奎尼酸（1,3,4,5 - 四羟基环己烷羧酸）是植物通过莽草酸生物合成途径的一个侧支合成的化合物，在草甘膦和乙酰乳酸合酶抑制型除草剂（ALS抑制剂）作用后会积累，且具有植物毒性潜力。本研究的目的是评估奎尼酸对几种杂草物种的植物毒性。在所评估的物种中，[此处原文缺失具体物种名称]对奎尼酸最为敏感，在6 - 8片真叶的物候期，奎尼酸浓度高于100 mM时就能抑制其生长。在用磺酰脲类或奎尼酸处理的敏感和抗性植物中进行了一项生理研究，包括莽草酸途径以及ALS抑制剂的生理标志物（碳水化合物和氨基酸）。在敏感种群中检测到了ALS抑制剂的典型生理效应（游离氨基酸和碳水化合物积累），而在抗性种群中未检测到。奎尼酸的作用模式似乎与其碳/氮代谢的总体紊乱有关，而非与莽草酸途径的特定变化有关。这些结果表明在[此处原文缺失具体植物名称]的杂草控制管理中使用奎尼酸的可能性。
