Current research was conducted to explore the effects of liquiritoside on the growth and physiochemical features of Chinese flowering cabbage (Brassica rapa subsp. parachinensis) under lead (Pb) stress. Lead stressed B. rapa plants exhibited decreased growth parameters, chlorophyll, and carotenoid contents. Moreover, Pb toxicity escalated the synthesis of malondialdehyde (MDA), hydrogen peroxide (H2O2), flavonoids, phenolics, and proline in treated plants. Nevertheless, foliar application of liquiritoside mitigated Pb toxicity by decreasing oxidative stress by reducing cysteine, H2O2, and MDA contents in applied plants. Liquiritoside significantly increased plant height, shoot fresh weight and dry weight, number of leaves, and marketable value of Chinese flowering cabbage plants exposed to Pb toxicity. This biotic elicitor also enhanced the proline, glutathione, total phenolics, and flavonoid contents in Chinese flowering cabbage plants exposed to Pb stress compared with the control. Additionally, total glucosinolate content, phytochelatins (PCs), and non-protein thiols were effectively increased in plants grown under Pb regimes compared with the control plants. Overall, foliar application of liquiritoside can markedly alleviate Pb stress by restricting Pb translocation in Chinese flowering cabbage.

中文翻译：

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Liquiritoside 减轻了芸苔亚种中铅引起的应激。Parachinensis：硫代葡萄糖苷含量的调节和一些理化属性。

目前的研究旨在探讨甘草苷对铅 (Pb) 胁迫下大白菜 (Brassica rapa subsp. parachinensis) 生长和理化特性的影响。铅胁迫 B. rapa 植物表现出降低的生长参数、叶绿素和类胡萝卜素含量。此外，Pb 毒性增加了处理过的植物中丙二醛 (MDA)、过氧化氢 (H2O2)、黄酮类化合物、酚类物质和脯氨酸的合成。尽管如此，甘草苷的叶面施用通过减少施用植物中的半胱氨酸、H2O2 和 MDA 含量来降低氧化应激，从而减轻了 Pb 毒性。Liquiritoside 显着增加了暴露于铅毒性的大白菜植株的株高、枝条鲜重和干重、叶数和销售价值。与对照相比，这种生物诱导剂还提高了暴露于铅胁迫的大白菜植株的脯氨酸、谷胱甘肽、总酚和黄酮类化合物的含量。此外，与对照植物相比，在铅方案下生长的植物中总硫代葡萄糖苷含量、植物螯合素 (PC) 和非蛋白质硫醇有效增加。总体而言，甘草苷叶面喷施可以通过限制大白菜中铅的易位来显着缓解铅胁迫。