In order to discover novel plant growth regulators and herbicides with new modes of action for crops production management and improvement, a series of new urea derivatives were designed and synthesized. The bioassay results demonstrated that target compounds exhibited remarkable inhibitory activities in the growth of hypocotyls and taproots and good promoting activity in the generation of lateral roots on Arabidopsis and rice, and compound Y9k showed considerable inhibition effects on germination of Bidens and growth of Abutilon in the herbicidal assay. These results suggested that compound Y9k may be a potential lead structure as a novel plant growth regulator for plant type regulation and weed control.

中文翻译：

---

具有优异植物生长抑制活性的新型尿素衍生物的设计、合成和生物活性

为了发现具有新作用模式的新型植物生长调节剂和除草剂，用于作物生产管理和改良，设计并合成了一系列新型尿素衍生物。生物测定结果表明，目标化合物对拟南芥和水稻的下胚轴和主根的生长具有显着的抑制活性，对拟南芥和水稻侧根的产生具有良好的促进作用，化合物Y9k对拟南芥和水稻中Bidens的萌发和Abutilon的生长有显着的抑制作用。除草剂测定。这些结果表明，化合物 Y9k 可能是一种潜在的先导结构，作为一种用于植物类型调节和杂草控制的新型植物生长调节剂。