AI Article Synopsis
- Ligusticum sinense cv. Chuanxiong (L. Chuanxiong), a common traditional Chinese medicine, is facing issues with high cadmium (Cd) levels, which impact its safety and quality for clinical use and international trade.
- A study was conducted under 25 μM Cd stress to examine the plant's physiological and biochemical responses, revealing that this concentration did not hinder growth but actually increased chlorophyll a and root activity, indicating a hormesis effect.
- The research also found that Cd stress led to thickened root cell walls and increased levels of glutathione (GSH), which helped mitigate oxidative stress and suggested mechanisms for Cd absorption and accumulation in L. Chuanxiong.
Article Abstract
Ligusticum sinense cv. Chuanxiong (L. Chuanxiong), one of the widely used traditional Chinese medicines (TCM), is currently facing the problem of excessive cadmium (Cd) content. This problem has significantly affected the quality and safety of L. Chuanxiong and become a vital factor restricting its clinical application and international trade development. Currently, to solve the problem of excessive Cd, it is essential to research the response mechanisms of L. Chuanxiong to Cd stress. However, there are few reports on its physiological and biochemical responses under Cd stress. In this study, we conducted the hydroponic experiment under 25 μM Cd stress, based on the Cd content of the genuine producing areas soil. The results showed that 25 μM Cd stress not only had no significant inhibitory effect on the growth of L. Chuanxiong seedlings but also significantly increased the chlorophyll a content (11.79%) and root activity (51.82%) compared with that of the control, which might be a hormesis effect. Further results showed that the absorption and assimilation of NH increased in seedlings under 25 μM Cd stress, which was associated with high photosynthetic pigments. Here, we initially hypothesized and confirmed that Cd exceedance in the root system of L. Chuanxiong was due to the thickening of the root cell wall, changes in the content of the cell wall components, and chelation of Cd by GSH. There was an increase in cell wall thickness (57.64 %) and a significant increase in cellulose (25.48%) content of roots under 25 μM Cd stress. In addition, L. Chuanxiong reduced oxidative stress caused by 25 μM Cd stress mainly through the GSH/GSSG cycle. Among them, GSH-Px (48.26%) and GR (42.64%) activities were significantly increased, thereby maintaining a high GSH/GSSG ratio. This study preliminarily reveals the response of L. Chuanxiong to Cd stress and the mechanism of Cd enrichment. It provides a theoretical basis for solving the problem of Cd excessive in L. Chuanxiong.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11473752 | PMC |
| http://dx.doi.org/10.1007/s44154-024-00187-5 | DOI Listing |
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