Huang Huayan, Liang Ke, Shangguan Yuxian, Tao Shan, Guo Yong, Liu Huakang, Sun Zaijin, Xu Heng
Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China.
Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China.
Chemosphere. 2024 Dec;369:143848. doi: 10.1016/j.chemosphere.2024.143848. Epub 2024 Dec 3.
Cadmium (Cd) pollution in Chinese herbal medicines poses a serious risk to medication safety. Regulating Cd uptake, transport, and accumulation in plants through ion-ion interactions offers a novel, environmentally sustainable, and practical approach to address this issue. However, the effects and underlying mechanisms of coexisting divalent cations zinc (Zn), magnesium (Mg), and manganese (Mn) on Cd uptake by Ligusticum sinense cv. Chuanxiong (L. chuanxiong) have not been comprehensively studied or well understood. In this study, the application of coexisting these cations (Zn, Mg, Mn) could significantly promote the growth of L. chuanxiong (21.11%-36.04%) and change the mobility of Cd in the soil-crop system. Specifically, adding Zn decreased Cd content in soil and plants by 18.23% and 20.62%, respectively, while Mg increased it by 10.99% and 62.27%. Mn addition, however, had no significant effect. Similar trends in soil enzyme activity were also observed with Zn, Mg, and Mn treatments. Simultaneously, the findings explore how coexisting divalent cations influence plant physiological responses, including photosynthesis and antioxidant capacities, enabling L. chuanxiong to better manage Cd stress. This study underscores the potential of ion-to-ion interactions as an effective approach to mitigate Cd accumulation, offering a practical and sustainable solution for enhancing the safety of Chinese herbal medicines. Additionally, the effects of mixed cation applications on Cd dynamics are complex, shaped by interactions between ion types, dosages, and their specific properties. These insights provide a foundation for developing more effective remediation strategies for Cd-contaminated soils, particularly in the cultivation of medicinal plants.
中药材中的镉（Cd）污染对用药安全构成严重风险。通过离子-离子相互作用来调控植物对镉的吸收、转运和积累，为解决这一问题提供了一种新颖、环境可持续且实用的方法。然而，共存的二价阳离子锌（Zn）、镁（Mg）和锰（Mn）对川芎镉吸收的影响及潜在机制尚未得到全面研究或充分理解。在本研究中，共存这些阳离子（Zn、Mg、Mn）的应用可显著促进川芎生长（21.11%-36.04%），并改变土壤-作物系统中镉的迁移性。具体而言，添加锌分别使土壤和植物中的镉含量降低了18.23%和20.62%，而镁则使其分别增加了10.99%和62.27%。然而，添加锰没有显著影响。在锌、镁和锰处理中也观察到了类似的土壤酶活性趋势。同时，研究结果探讨了共存二价阳离子如何影响植物的生理反应，包括光合作用和抗氧化能力，使川芎能够更好地应对镉胁迫。本研究强调了离子-离子相互作用作为减轻镉积累的有效方法的潜力，为提高中药材安全性提供了一种实用且可持续的解决方案。此外，混合阳离子应用对镉动态的影响是复杂的，受离子类型、剂量及其特定性质之间相互作用的影响。这些见解为开发更有效的镉污染土壤修复策略奠定了基础，特别是在药用植物种植方面。
